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Dr Grant Webber

Senior Lecturer

School of Engineering (Chemical Engineering)

Career Summary

Biography

Although only a junior academic, I have made significant contributions to the fields of polymeric surface coatings and atomic force microscope (AFM) colloid probe force measurements, as evidenced by my solid record of publishing in international journals of high impact factor. I pioneered the use of AFM to image in-situ the development of films of polymer micelles adsorbed from aqueous solution onto solid substrates. I was the lead author of the first report to observe in-situ morphological changes in an adsorbed film of copolymer micelles in response to a change in aqueous solution pH. A subsequent article, again as lead author, was the first-ever report of reversible stimulus-responsive behaviour of micellar thin-films where the behaviour was in reaction to a simple aqueous solution based trigger. The novelty of this work in the context of coatings for controlled surface interactions cannot be underestimated.

My research methodolgy for understanding the properties of polymer adsorption is the combined application of a number of specialised scientific methods, such as atomic force microscopy, quartz crystal microbalance, electrophoretic mobility, contact angle and surface tension, and dynamic and static light scattering. This holistic approach has extracted significant new knowledge on the fundamental processes of polymer adsorption, and has enabled rigourous investigation of the link between microscopic changes in the morphology of polymer films and macroscopic properties such as wettability. I have recently started investigating ionic liquids. Ionic liquids are composed entirely of ions, and yet are liquid at room temperature, offering intriguing properties such as a wide solubility window and a high degree of molecular ordering when confined at a solid interface. Along with Dr Rob Atkin, for the Chemistry department at the University of Newcastle, we are investigating the properties of colloidal dispersions is ionic liquids, and probing important frictional and hydrodynamic forces. Previous work at the University of Melbourne focused on the use of atomic force microscopy to measure the interactions between deformable interfaces. Here I overcame the extreme technical difficulties of using an oil drop as a colloid probe, demonstrating my skills as an experimentalist.

I am skilled in atomic force microscopy, both imaging and colloidal probe force measurements, quartz crystal microbalance, dynamic light scattering, and electrophoretic mobility and rheological measurements. My current H-Index is 8, I have over 230 citations, and I have three articles with 40 or more citations (ISI Web of Science, February 2010). Below is a shortlist of some of my most important publications: 1. Webber, Grant B., Wanless, Erica J., Armes, Steven P., Baines, Fiona L., Biggs, Simon, Adsorption of Amphiphilic Diblock Copolymer Micelles at the Mica/Solution Interface. Langmuir, 17, 5551-5561 (2001) 2. Webber, Grant B., Wanless, Erica J., Bütün, Vural, Armes, Steven P., Biggs, Simon, Self-Organized Monolayer Films of Stimulus-Responsive Micelles. Nano Letters, 2, 1307-1313 (2002) 3. Webber, Grant B., Wanless, Erica J., Armes, Steven P., Tang, Yiqing, Li, Yuting, Biggs, Simon, Nano-anemones: Stimulus-responsive copolymer-micelle surfaces. Advanced Materials, 16, 1794-1798 (2004) 4. Webber, Grant B., Manica, Rogerio, Edwards, Scott A., Carnie, Steven L., Stevens, Geoffrey W., Grieser, Franz, Dagastine, Raymond R., Chan, Derek Y. C., Dynamic Forces between a Moving Particle and a Deformable Drop. Journal of Physical Chemistry C, 112, 567-574 (2008) 5. Smith, Jacob A., Werzer, Oliver, Webber, Grant B., Warr, Gregory G. and Atkin, Rob, Surprising particle stability and rapid sedimentation rates in an ionic liquid. Journal of Physical Chemistry Letters, 1, 64-68 (2010)

Research Expertise
My research uses engineered surfaces and interfaces to control material properties. By combining the disciplines of chemical engineering and physical chemistry my research aims to solve real-world problems through the application of fundamental science. I have an extensive track record in the production and characterisation of stimulus-responsive polymer thin-film coatings. These coatings change their structure at a molecular level in response to external stimuli such as solution pH, temperature or salt concentration. The nanoscale switches in morphology impact macroscale behaviour, such as contact angle and wettability. Recent research has investigated the production of stimulus-responsive polymer coatings via a process known as surface initiated polymerisation. This process is water-based, has low energy requirements, and offers enhanced control of the three-dimensional structure of the coating. In this way we are able to better engineer a surface or interface to meet a specific end-use application, such as a temperature dependent rheology modifier. Another are of research is examining the effect of mixed stabilisers on the stability and rheology of emulsions, in particular highly-concentrated emulsions. Here, a combination of surfactant and particles are used to stabilise the oil-water interface. We are using dynamic and equilibrium surface tension measurements to characterise structure of the interface and relating this to emulsion stability during shear. I have recently started working in an exciting emerging field; ionic liquids. Ionic liquids have quite unusual physical and chemical properties, and are seen by many as ideal designer solvents for a range of industrial applications. My research is investigating the properties of dispersions of microscale solid particles in ionic liquids; a proposed application of ionic liquids is as solvents for catalytic reactions. We have discovered some unusual behaviour, such as high stability in conjunction with rapid settling, and are using a combination of friction, hydrodynamic and rheological measurements to further understand these remarkable class of materials. My research spans a wide range of length scales, from the nano- to micro- and up to the macroscale. As such I use an array of instruments and techniques in the course of my research: - atomic force microscopy for imaging, including soft-contact imaging in fluids, and force work - quartz crystal microbalance and optical reflectometry techniques to quantify adsorption of material at solid interfaces - dynamic and static light scattering for measuring particle sizes - electrophoretic techniques to measure particle surface charge (zeta potential) - surface and interfacial tension - contact angle - rheology

Teaching Expertise
I am course coordinator and sole lecturer for the 2nd year chemical engineering course Particle Processing. This course covers are range of topic related to particle and mineral processing, from small scale inter-particle interactions to industrial scale unit operations. I introduce students to the fundamental processes that control the interactions between two particles, such as the Deryagin-Landau and Verwey-Overbeek (DLVO) theory that quantifies the effect of surface charge and van der Waals forces. We also examine the effect of surfactant and polymer adsorption at surfaces and interfaces, and discuss the stability and application of emulsions. The course also details unit operations important to particle processing, such as crushing and grinding, pneumatic conveying, storage hopper design, and fluidised beds. I am also strongly committed to ensuring that our chemical engineering students have adequate laboratory and practical skills, coupled with the ability to prepare coherent technical reports. To this I am course coordinator of the 2nd year laboratory course. This course uses bench-scale equipment to give the student practical demonstrations of theories they have learnt in lecture courses. These experiments include a forced air cooling tower, fluidised bed, and concentric tube heat exchanger. In this course the students are also expected to prepare technical reports, from which extensive feedback is provided so that the students are able to improve their skills in this often underrated component of engineering.

Administrative Expertise
Since starting at the University of Newcastle in late 2007 I have been a member of the Faculty of Engineering and Built Environment (FEBE) Marketing Committee. I see this role as an important component of my job as a Chemical Engineering academic, as I believe there is great scope for increasing the profile of chemical engineering in the wider community. I am particularly dedicated to educating secondary students of the role of chemical engineers in todays society. To this I organise regular visits of my academic colleagues to high schools, as well as attending larger events, such as Careers Days, where I am able to reach a broader range of potential students. I have recently become a member of the FEBE Research Committee, which meets regularly to discuss issues that impact on research-active members of the Faculty.

Collaborations
My research uses engineered surfaces and interfaces to control material properties. By combining the disciplines of chemical engineering and physical chemistry my research aims to solve real-world problems through the application of fundamental science. I have an extensive track record in the production and characterisation of stimulus-responsive polymer thin-film coatings. These coatings change their structure at a molecular level in response to external stimuli such as solution pH, temperature or salt concentration. The nanoscale switches in morphology impact macroscale behaviour, such as contact angle and wettability. Recent research has investigated the production of stimulus-responsive polymer coatings via a process known as surface initiated polymerisation. This process is water-based, has low energy requirements, and offers enhanced control of the three-dimensional structure of the coating. In this way we are able to better engineer a surface or interface to meet a specific end-use application, such as a temperature dependent rheology modifier. Another are of research is examining the effect of mixed stabilisers on the stability and rheology of emulsions, in particular highly-concentrated emulsions. Here, a combination of surfactant and particles are used to stabilise the oil-water interface. We are using dynamic and equilibrium surface tension measurements to characterise structure of the interface and relating this to emulsion stability during shear. I have recently started working in an exciting emerging field; ionic liquids. Ionic liquids have quite unusual physical and chemical properties, and are seen by many as ideal designer solvents for a range of industrial applications. My research is investigating the properties of dispersions of microscale solid particles in ionic liquids; a proposed application of ionic liquids is as solvents for catalytic reactions. We have discovered some unusual behaviour, such as high stability in conjunction with rapid settling, and are using a combination of friction, hydrodynamic and rheological measurements to further understand these remarkable class of materials. My research spans a wide range of length scales, from the nano- to micro- and up to the macroscale. As such I use an array of instruments and techniques in the course of my research: - atomic force microscopy for imaging, including soft-contact imaging in fluids, and force work - quartz crystal microbalance and optical reflectometry techniques to quantify adsorption of material at solid interfaces - dynamic and static light scattering for measuring particle sizes - electrophoretic techniques to measure particle surface charge (zeta potential) - surface and interfacial tension - contact angle - rheology


Qualifications

  • PhD, University of Newcastle
  • Bachelor of Mathematics, University of Newcastle
  • Bachelor of Science (Honours), University of Newcastle
  • Bachelor of Science, University of Newcastle

Keywords

  • Atomic Force Microscope
  • Chemical Engineering
  • Chemistry
  • Colloid
  • Functional
  • Interface
  • Laboratory
  • Particle
  • Particle Processing
  • Surface

Fields of Research

CodeDescriptionPercentage
030603Colloid and Surface Chemistry50
090406Powder and Particle Technology10
091499Resources Engineering and Extractive Metallurgy not elsewhere classified40

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
1/01/2015 - Senior LecturerUniversity of Newcastle
School of Engineering
Australia

Academic appointment

DatesTitleOrganisation / Department
1/11/2007 - LecturerUniversity of Newcastle
School of Engineering
Australia
1/11/2005 - 1/11/2007Post-Doctoral Research FellowThe University of Melbourne
Particulate Fluids Processing Centre
Australia
1/05/2004 - 1/10/2005Post-Doctoral Research FellowUniversity of Leeds
Institute of Particle Science and Engineering
United Kingdom
1/05/2003 - 1/05/2004Royal Academy of Engineering Anglo-Australian Post-Doctoral Research FellowUniversity of Leeds
Institute of Particle Science and Engineering
United Kingdom
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (42 outputs)

YearCitationAltmetricsLink
2015McLean B, Li H, Stefanovic R, Wood RJ, Webber GB, Ueno K, et al., 'Nanostructure of [Li(G4)] TFSI and [Li(G4)] NO3 solvate ionic liquids at HOPG and Au(111) electrode interfaces as a function of potential', PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 17 325-333 (2015)
DOI10.1039/c4cp04522jAuthor URL
CitationsScopus - 1
Co-authorsRob Atkin
2015Willott JD, Humphreys BA, Murdoch TJ, Edmondson S, Webber GB, Wanless EJ, 'Hydrophobic effects within the dynamic pH-response of polybasic tertiary amine methacrylate brushes.', Phys Chem Chem Phys, 17 3880-3890 (2015)
DOI10.1039/c4cp05292gAuthor URL
CitationsWeb of Science - 1
Co-authorsErica Wanless
2015Willott JD, Murdoch TJ, Humphreys BA, Edmondson S, Wanless EJ, Webber GB, 'Anion-specific effects on the behavior of pH-sensitive polybasic brushes.', Langmuir, 31 3707-3717 (2015)
DOI10.1021/acs.langmuir.5b00116Author URL
Co-authorsErica Wanless
2015Chen Z, Kobayashi Y, Webber GB, Ueno K, Watanabe M, Warr GG, Atkin R, 'Adsorption of Polyether Block Copolymers at Silica-Water and Silica-Ethylammonium Nitrate Interfaces.', Langmuir, (2015)
DOI10.1021/acs.langmuir.5b01500Author URL
Co-authorsRob Atkin
2014Willott JD, Murdoch TJ, Humphreys BA, Edmondson S, Webber GB, Wanless EJ, 'Critical salt effects in the swelling behavior of a weak polybasic brush.', Langmuir, 30 1827-1836 (2014) [C1]
DOI10.1021/la4047275Author URL
CitationsScopus - 6Web of Science - 7
Co-authorsErica Wanless
2014Sweeney J, Webber GB, Rutland MW, Atkin R, 'Effect of ion structure on nanoscale friction in protic ionic liquids.', Phys Chem Chem Phys, 16 16651-16658 (2014) [C1]
DOI10.1039/c4cp02320jAuthor URL
CitationsScopus - 3Web of Science - 4
Co-authorsRob Atkin
2014Morse AJ, Tan SY, Giakoumatos EC, Webber GB, Armes SP, Ata S, Wanless EJ, 'Arrested coalescence behaviour of giant Pickering droplets and colloidosomes stabilised by poly(tert-butylaminoethyl methacrylate) latexes.', Soft Matter, 10 5669-5681 (2014) [C1]
DOI10.1039/c4sm00801dAuthor URL
CitationsScopus - 1Web of Science - 2
Co-authorsSeher Ata, Erica Wanless
2014Smith JA, Webber GB, Warr GG, Zimmer A, Atkin R, Werzer O, 'Shear dependent viscosity of poly(ethylene oxide) in two protic ionic liquids', Journal of Colloid and Interface Science, 430 56-60 (2014) [C1]

Steady shear viscosity measurements have been performed on 100. kDa poly(ethylene oxide) (PEO) dissolved in the protic ionic liquids ethylammonium nitrate (EAN) and propylammonium nitrate (PAN) and in water. The zero shear viscosity in all three solvents increases with polymer concentration, falling into three concentration regimes corresponding to dilute, semi-dilute and network solutions. Huggins plots reveal three distinct solvent conditions: good (water), good-theta (EAN) and theta (PAN). However, differences in the transition concentrations, power law behaviour of the viscosities, and relaxation times arising from shear thinning in the two ILs can be directly related to the effects of solvent nanostructure. © 2014 Elsevier Inc.

DOI10.1016/j.jcis.2014.05.006
CitationsScopus - 2
Co-authorsRob Atkin
2014Liyanaarachchi KR, Webber GB, van Netten K, Moreno-Atanasio R, Galvin KP, 'Selective collection of fine particles by water drops', Advanced Powder Technology, (2014) [C1]

This study was concerned with the interaction between a gaseous dispersion of fine particles travelling in the horizontal direction and discrete drops of water falling vertically through the dispersion. A simple analytical model of the particle-drop collision was developed to describe the particle recovery by the drops as a function of the water flux, covering two extremes of relative velocity between the particles and drops. The Discrete Element Method was used to validate the analytical model. Further validation of the model and insights were obtained through experimental studies. The physical process of wetting was observed to be important in influencing the tendency of particles to become engulfed by the drops of water, or to either adhere to the drops or by-pass the drops altogether. Hydrophilic particles were readily engulfed while hydrophobic particles, at best, adhered to the surface of the drop, or failed to attach. Moreover, the recovery of the hydrophilic silica particles was significantly higher than the recovery of hydrophobic coal particles, with the selectivity ratio approximately 1.5. Spherical ballotini particles were the most sensitive, with a notable increase in recovery when cleaned, and evidence of increased recovery with increasing particle size. The recovery of irregular shaped silica flour particles, however, was largely independent of the particle size. A similar result was observed for irregular coal particles, though the recoveries were all lower than relatively more hydrophilic ballotini or silica flour. Crown Copyright © 2014.

DOI10.1016/j.apt.2014.03.009
Co-authorsRoberto Moreno-Atanasio, Kevin Galvin
2014Murphy T, Varela LM, Webber GB, Warr GG, Atkin R, 'Nanostructure-thermal conductivity relationships in protic ionic liquids', Journal of Physical Chemistry B, 118 12017-12024 (2014) [C1]

The thermal conductivities of nine protic ionic liquids (ILs) have been investigated between 293 and 340 K. Within this range, the thermal conductivities are between 0.18 and 0.30 W·m-1·K-1. These values are higher than those typically associated with oils and aprotic ILs, but lower than those of strongly hydrogen bonding solvents like water. Weak linear decreases in thermal conductivity with temperature are noted, with the exception of ethanolammonium nitrate (EtAN) where the thermal conductivity increases with temperature. The dependence of thermal conductivity on IL type is analyzed with use of the Bahe-Varela pseudolattice theory. This theory treats the bulk IL as an array of ordered domains with intervening domains of uncorrelated structure which enable and provide barriers to heat propagation (respectively) via allowed vibrational modes. For the protic ILs investigated, thermal conductivity depends strongly on the IL cation alkyl chain length. This is because the cation alkyl chain controls the dimensions of the IL bulk nanostructure, which consists of charged (ordered domains) and uncharged regions (disordered domains). As the cation alkyl chain controls the dimensions of the disordered domains, it thus limits the thermal conductivity. To test the generality of this interpretation, the thermal conductivities of propylammonium nitrate (PAN) and PAN-octanol mixtures were examined; water selectively swells the PAN charged domain, while octanol swells the uncharged regions. Up to a certain concentration, adding water increases thermal conduction and octanol decreases it, as expected. However, at high solute concentrations the IL nanostructure is broken. When additional solvent is added above this concentration the rate of change in thermal conductivity is greatly reduced. This is because, in the absence of nanostructure, the added solvent only serves to dilute the salt solution.

DOI10.1021/jp507408r
Co-authorsRob Atkin
2014Addicoat MA, Stefanovic R, Webber GB, Atkin R, Page AJ, 'Assessment of the density functional tight binding method for protic ionic liquids', Journal of Chemical Theory and Computation, 10 4633-4643 (2014) [C1]

Density functional tight binding (DFTB), which is ~100-1000 times faster than full density functional theory (DFT), has been used to simulate the structure and properties of protic ionic liquid (IL) ions, clusters of ions and the bulk liquid. Proton affinities for a wide range of IL cations and anions determined using DFTB generally reproduce G3B3 values to within 5-10 kcal/mol. The structures and thermodynamic stabilities of n-alkyl ammonium nitrate clusters (up to 450 quantum chemical atoms) predicted with DFTB are in excellent agreement with those determined using DFT. The IL bulk structure simulated using DFTB with periodic boundary conditions is in excellent agreement with published neutron diffraction data.

DOI10.1021/ct500394t
CitationsScopus - 1Web of Science - 1
Co-authorsRob Atkin, Alister Page
2014Smith J, Webber GB, Warr GG, Atkin R, 'Silica particle stability and settling in protic ionic liquids', Langmuir, 30 1506-1513 (2014) [C1]

Silica particle suspensions of 10 wt % have been investigated in the protic ionic liquids (ILs) ethylammonium nitrate (EAN), ethanolammonium nitrate (EtAN), propylammonium nitrate (PAN), and dimethylethylammonium formate (DMEAF). Static and dynamic light scattering reveal that single particles coexist in dynamic equilibrium with flocculated networks at room temperature. These types of systems are classified as weakly flocculated and are quite rare. As weakly flocculated systems generally exist only within a narrow range of conditions, the effect of temperature was probed. When temperature is increased, the thermal motion of suspended particles increases, favoring dispersion, but in ILs suspensions, heating reduces the stabilizing effect of the interfacial structure of the IL. When subjected to a small increase in temperature, particle suspensions in ILs become unstable, indicated by the absence of a peak corresponding to single particles in the light scattering data. For EAN and DMEAF, further increasing temperatures above 40 C returns the systems to a weakly flocculated state in which thermal energy is sufficient to break particles away from aggregates. Weakly flocculated suspensions in EAN and EtAN settle more rapidly than predicted by the Stokes equation, as the particles spend a significant portion of time in large, rapidly settling flocs. Surprisingly, suspensions in PAN and DMEAF settle slower than predicted. Oscillatory rheology indicates that these suspensions are viscoelastic, due to a persistent, long-range structure in the suspension that slows settling. In aggregated systems, settling is very rapid. © 2014 American Chemical Society.

DOI10.1021/la403978b
CitationsScopus - 1Web of Science - 1
Co-authorsRob Atkin
2013Liyanaarachchi KR, Ireland PM, Webber GB, Galvin KP, 'Electrostatic formation of liquid marbles and agglomerates', APPLIED PHYSICS LETTERS, 103 (2013) [C1]
DOI10.1063/1.4817586Author URL
CitationsScopus - 1Web of Science - 1
Co-authorsKevin Galvin, Peter Ireland
2013Cheesman BT, Neilson AJG, Willott JD, Webber GB, Edmondson S, Wanless EJ, 'Effect of Colloidal Substrate Curvature on pH-Responsive Polyelectrolyte Brush Growth', LANGMUIR, 29 6131-6140 (2013) [C1]
DOI10.1021/la4004092Author URL
CitationsScopus - 7Web of Science - 7
Co-authorsErica Wanless
2013Elbourne A, Sweeney J, Webber GB, Wanless EJ, Warr GG, Rutland MW, Atkin R, 'Adsorbed and near-surface structure of ionic liquids determines nanoscale friction', CHEMICAL COMMUNICATIONS, 49 6797-6799 (2013) [C1]
DOI10.1039/c3cc42844cAuthor URL
CitationsScopus - 15Web of Science - 17
Co-authorsErica Wanless, Rob Atkin
2013Cheesman BT, Smith EG, Murdoch TJ, Guibert C, Webber GB, Edmondson S, Wanless EJ, 'Polyelectrolyte brush pH-response at the silica-aqueous solution interface: a kinetic and equilibrium investigation', PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 15 14502-14510 (2013) [C1]
DOI10.1039/c3cp52281dAuthor URL
CitationsScopus - 3Web of Science - 4
Co-authorsErica Wanless
2013Smith JA, Webber GB, Warr GG, Atkin R, 'Rheology of Protic Ionic Liquids and Their Mixtures', JOURNAL OF PHYSICAL CHEMISTRY B, 117 13930-13935 (2013) [C1]
DOI10.1021/jp407715eAuthor URL
CitationsScopus - 9Web of Science - 9
Co-authorsRob Atkin
2012Wakeham D, Eschebach DS, Webber GB, Atkin R, Warr GG, 'Surface composition of mixtures of ethylammonium nitrate, ethanolammonium nitrate, and water', Australian Journal of Chemistry, 65 1554-1556 (2012) [C1]
CitationsScopus - 6Web of Science - 6
Co-authorsRob Atkin
2012Carstens T, Hayes RL, Abedin SZE, Corr BJ, Webber GB, Borisenko N, et al., 'In situ STM, AFM and DTS study of the interface 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate/Au(1 1 1)', Electrochimica Acta, 82 48-59 (2012) [C1]
DOI10.1016/j.electacta.2012.01.111
CitationsScopus - 17Web of Science - 16
Co-authorsRob Atkin
2012Sweeney JT, Hausen F, Hayes RL, Webber GB, Endres F, Rutland MW, et al., 'Control of nanoscale friction on gold in an ionic liquid by a potential-dependent ionic lubricant layer', Physical Review Letters, 109 155502 (2012) [C1]
DOI10.1103/PhysRevLett.109.155502
CitationsScopus - 46Web of Science - 42
Co-authorsRob Atkin
2012Thompson KL, Giakoumatos EC, Ata S, Webber GB, Armes SP, Wanless EJ, 'Direct observation of giant pickering emulsion and colloidosome droplet interaction and stability', Langmuir, 28 16501-16511 (2012) [C1]
CitationsScopus - 10Web of Science - 10
Co-authorsSeher Ata, Erica Wanless
2012MacPherson SA, Webber GB, Moreno-Atanasio R, 'Aggregation of nanoparticles in high ionic strength suspensions: Effect of Hamaker constant and particle concentration', Advanced Powder Technology, 23 478-484 (2012) [C1]
CitationsScopus - 4Web of Science - 3
Co-authorsRoberto Moreno-Atanasio
2012Hayes RL, Borisenko N, Corr BJ, Webber GB, Endres F, Atkin R, 'Effect of dissolved LiCl on the ionic liquid-Au(111) electrical double layer structure', Chemical Communications, 48 10246-10248 (2012) [C1]
CitationsScopus - 22Web of Science - 21
Co-authorsRob Atkin
2012Cheesman BT, Willott JD, Webber GB, Edmondson S, Wanless EJ, 'pH-responsive brush-modified silica hybrids synthesized by surface-initiated ARGET ATRP', ACS Macro Letters, 1 1161-1165 (2012) [C1]
DOI10.1021/mz3003566
CitationsScopus - 12Web of Science - 12
Co-authorsErica Wanless
2010Smith JA, Werzer O, Webber GB, Warr GG, Atkin R, 'Surprising particle stability and rapid sedimentation rates in an ionic liquid', Journal of Physical Chemistry Letters, 1 64-68 (2010) [C1]
DOI10.1021/jz9000642
CitationsScopus - 36Web of Science - 34
Co-authorsRob Atkin
2010Dagastine RR, Webber GB, Manica R, Stevens GW, Grieser F, Chan DYC, 'Viscosity Effects on Hydrodynamic Drainage Force Measurements Involving Deformable Bodies', LANGMUIR, 26 11921-11927 (2010) [C1]
DOI10.1021/la1012473Author URL
CitationsScopus - 16Web of Science - 16
2008Webber GB, Edwards SA, Stevens GW, Grieser F, Dagastine RR, Chan DYC, 'Measurements of dynamic forces between drops with the AFM: novel considerations in comparisons between experiments and theory.', Soft Matter, 4 1270-1278 (2008) [C1]
DOI10.1039/b717303b
CitationsScopus - 30Web of Science - 29
2008Webber GB, Manica R, Edwards SA, Carnie SL, Stevens GW, Grieser F, et al., 'Dynamic Forces between a Moving Particle and a Deformable Drop.', The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 112 567-574 (2008) [C1]
DOI10.1021/jp076215d
CitationsScopus - 16Web of Science - 16
2008Sakai K, Webber GB, Vo C-D, Wanless EJ, Vamvakaki M, Butun V, et al., 'Characterization of layer-by-layer self-assembled multilayer films of diblock copolymer micelles', Langmuir, 24 116-123 (2008) [C1]
DOI10.1021/la7021006
CitationsScopus - 23Web of Science - 22
Co-authorsErica Wanless
2008Webber GB, Stevens GW, Grieser F, Dagastine RR, Chan DYC, 'Variations in properties of atomic force microscope cantilevers fashioned from the same wafer.', Nanotechnology, 19 1-6 (2008) [C1]
DOI10.1088/0957-4484/19/10/105709
CitationsScopus - 9Web of Science - 8
2007Biggs S, Labarre M, Hodges C, Walker LM, Webber GB, 'Polymerized rodlike micelle adsorption at the solid-liquid interface', LANGMUIR, 23 8094-8102 (2007) [C1]
DOI10.1021/1a700708gAuthor URL
CitationsWeb of Science - 7
2007Biggs S, Sakai K, Addison T, Schmid A, Armes SP, Vamvakaki M, et al., 'Layer-by-layer formation of smart particle coatings using oppositely charged block copolymer micelles', ADVANCED MATERIALS, 19 247-+ (2007) [C1]
DOI10.1002/adma.200601553Author URL
CitationsWeb of Science - 54
2007Smith EG, Webber GB, Sakai K, Biggs S, Armes SP, Wanless EJ, 'Direct visualization of a self-organized multilayer film of low T g diblock copolymer micelles', Journal of Physical Chemistry B, 111 5536-5541 (2007) [C1]
DOI10.1021/jp072231z
CitationsScopus - 16Web of Science - 16
Co-authorsErica Wanless
2007Sakai K, Smith EG, Webber GB, Baker MJ, Wanless EJ, Butun V, et al., 'pH-responsive behavior of selectively quaternized diblock copolymers adsorbed at the silica/aqueous solution interface', Journal of Colloid and Interface Science, 314 381-388 (2007) [C1]
DOI10.1016/j.jcis.2007.06.018
CitationsScopus - 13Web of Science - 13
Co-authorsErica Wanless
2006Sakai K, Smith EG, Webber GB, Wanless EJ, Butun V, Armes SP, Biggs S, 'Effects of copolymer concentration and chain length on the pH-responsive behavior of diblock copolymer micellar films', Journal of Colloid and Interface Science, 303 372-379 (2006) [C1]
DOI10.1016/j.jcis.2006.07.077
CitationsScopus - 10Web of Science - 10
Co-authorsErica Wanless
2006Sakai K, Smith EG, Webber GB, Baker MJ, Wanless EJ, Butun V, et al., 'Characterizing the pH-responsive behavior of thin films of diblock copolymer micelles at the silica/aqueous solution interface', Langmuir, 22 8435-8442 (2006) [C1]
DOI10.1021/la061708f
CitationsScopus - 31Web of Science - 31
Co-authorsErica Wanless
2006Sakai K, Smith EG, Webber GB, Schatz C, Wanless EJ, Butun V, et al., 'pH-responsive diblock copolymer micelles at the silica/aqueous solution interface: Adsorption kinetics and equilibrium studies', Journal of Physical Chemistry B, 110 14744-14753 (2006) [C1]
DOI10.1021/jp062830q
CitationsScopus - 24Web of Science - 24
Co-authorsErica Wanless
2006Sakai K, Smith EG, Webber GB, Schatz C, Wanless EJ, Butun V, et al., 'Comparison of the adsorption of cationic diblock copolymer micelles from aqueous solution onto mica and silica', Langmuir, 22 5328-5333 (2006) [C1]
DOI10.1021/la060662n
CitationsScopus - 26Web of Science - 24
Co-authorsErica Wanless
2005Webber GB, Wanless EJ, Armes SP, Biggs S, 'Tunable diblock copolymer micelles-adapting behaviour via subtle chemical modifications', FARADAY DISCUSSIONS, 128 193-209 (2005) [C1]
DOI10.1039/b403180fAuthor URL
CitationsScopus - 28Web of Science - 25
Co-authorsErica Wanless
2004Webber GB, Wanless EJ, Armes SP, Tang Y, Li Y, Biggs S, 'Nano-Anemones: Stimulus-Responsive Copolymer-Micelle Surfaces', Advanced Materials, 16 1794-1798 (2004) [C1]
DOI10.1002/adma.200400086
CitationsScopus - 70Web of Science - 68
Co-authorsErica Wanless
2002Webber GB, Wanless EJ, Butun V, Armes S, Biggs SR, 'Self-organized monolayer films of stimulus-responsive micelles', Nano Letters, 2 1307-1313 (2002) [C1]
CitationsScopus - 56Web of Science - 57
Co-authorsErica Wanless
2001Webber GB, Wanless EJ, Armes SP, Baines FL, Biggs S, 'Adsorption of amphiphilic diblock copolymer micelles at the mica/solution interface', Langmuir, 17 5551-5561 (2001) [C1]
DOI10.1021/la010335+
CitationsScopus - 53Web of Science - 54
Co-authorsErica Wanless
Show 39 more journal articles

Conference (14 outputs)

YearCitationAltmetricsLink
2014Jarrett ED, Galvin KP, Ireland PM, Webber GB, 'Collection of Fine Particles by a Water Droplet under an Applied Electric Field.', Chemeca 2014: Processing excellence; Powering our future, Perth (2014)
2014Wanless EJ, Smith J, Bournival G, Tan SY, Webber GB, Ata S, 'High speed video observations of alumina-coated air bubble coalescence', Chemeca 2014: Processing excellence; Powering our future, Perth (2014) [E1]
Co-authorsSeher Ata, Erica Wanless
2014Morse AJ, Tan S-Y, Giakoumatos EC, Webber GB, Armes SP, Ata S, Wanless EJ, 'Coalescence behavior of giant Pickering droplets and colloidosomes stabilized by poly(tert-butylaminoethyl methacrylate) latexes', ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, San Francisco, CA (2014) [E3]
Author URL
Co-authorsSeher Ata, Erica Wanless
2014Atkin R, Li H, Sweeney J, Elbourne A, Webber G, Rutland M, Warr GG, 'Effect of surface nanostructure and ion structure on the nanotribology of the graphite: Ionic liquid interface', ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, San Francisco, CA (2014) [E3]
Author URL
Co-authorsRob Atkin
2014Liyanaarachchi KR, Webber GB, Van Netten K, Moreno-Atanasio R, Galvin KP, 'Selective collection of fine particles by water drops', Advanced Powder Technology (2014)

This study was concerned with the interaction between a gaseous dispersion of fine particles travelling in the horizontal direction and discrete drops of water falling vertically through the dispersion. A simple analytical model of the particle-drop collision was developed to describe the particle recovery by the drops as a function of the water flux, covering two extremes of relative velocity between the particles and drops. The Discrete Element Method was used to validate the analytical model. Further validation of the model and insights were obtained through experimental studies. The physical process of wetting was observed to be important in influencing the tendency of particles to become engulfed by the drops of water, or to either adhere to the drops or by-pass the drops altogether. Hydrophilic particles were readily engulfed while hydrophobic particles, at best, adhered to the surface of the drop, or failed to attach. Moreover, the recovery of the hydrophilic silica particles was significantly higher than the recovery of hydrophobic coal particles, with the selectivity ratio approximately 1.5. Spherical ballotini particles were the most sensitive, with a notable increase in recovery when cleaned, and evidence of increased recovery with increasing particle size. The recovery of irregular shaped silica flour particles, however, was largely independent of the particle size. A similar result was observed for irregular coal particles, though the recoveries were all lower than relatively more hydrophilic ballotini or silica flour.

DOI10.1016/j.apt.2014.03.009
Co-authorsKevin Galvin, Roberto Moreno-Atanasio
2013Asencio RA, Cranston ED, Wakeham D, Niga P, Werzer O, Sweeney J, et al., 'Nanotribology: Tribotronics, ionic liquids and control of surface interactions', 5th World Tribology Congress, WTC 2013 (2013)

The interfacial ordering of Ionic liquids leads to interesting nanotribological properties as revealed by colloid probe studies. The first of these is the clear correlation between the number of ion pairs trapped in the tribological contact and the friction coefficient displayed. The second is the fact that the surface electrical potential can be used to control the composition of the boundary layer and thus tune the friction. Thirdly, the interfacial ordering appears to significantly affect the fluid dynamics over large distances.

Co-authorsRob Atkin
2012Liyanaarachchi KR, Webber GB, Galvin KP, 'Selective collection of fine particles by water drops', 2012 AIChE Annual Meeting, Pittsburgh, Pennsylvania (2012) [E3]
Co-authorsKevin Galvin, Roberto Moreno-Atanasio
2011Webber GB, MacPherson SA, Moreno-Atanasio R, 'The kinetics of colloidal aggregation - Effect of bimodal Hamaker constant distribution and Brownian forces', Abstract Booklet. UK Colloids 2011: An international Colloid & Surface Science Symposium, Canary Wharf, London, United Kingdom (2011) [E3]
Co-authorsRoberto Moreno-Atanasio
2011MacPherson SA, Webber GB, Moreno-Atanasio R, 'The kinetics of colloidal aggregation: Influence of the van der Waals forces', Chemeca 2011: Engineering a Better World, Sydney (2011) [E1]
Co-authorsRoberto Moreno-Atanasio
2011Neville FC, Murphy TI, Webber GB, Wanless EJ, Jameson GJ, 'Fabrication and characterisation of biomimetic silicate nanoparticles', Chemeca 2011: Engineering a Better World, Sydney (2011) [E1]
Co-authorsGraeme Jameson, Erica Wanless, Frances Neville
2010Galvin KP, Webber GB, Mason M, Liyanaarachchi KR, 'Inverse flotation - A new method of fine particle beneficiation', Chemeca 2010: Proceedings of the 40th Australasian Chemical Engineering Conference, Adelaide, Australia (2010) [E1]
Co-authorsKevin Galvin
2006Harbottle D, Webber GB, Fairweather M, Rhodes D, Biggs S, 'Applying the quartz crystal microbalance technique to determine the stability of colloidal suspensions.', Conference Proceedings of the AIChE Spring National Meeting, Orlando, Florida, United States (2006) [E1]
2005Webber GB, Sakai K, Wanless EJ, Armes SP, Vamvakaki M, Butun V, Biggs S, 'Preparation, Characterisation and utilisation of Diblock Copolymer Michelle Thin-Films and Multilayers', Proceedings of 7th World Congress of Chemical Engineering, Glasgow, Scotland (2005) [E1]
Co-authorsErica Wanless
2005Sakai K, Webber GB, Butun V, Vamvakaki M, Armes SP, Biggs S, 'Self-assembled diblock copolymers as nanomaterial building blocks', Proceedings of the 7th World Congress of Chemical Engineering, Glasgow (2005) [E1]
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Grants and Funding

Summary

Number of grants17
Total funding$1,437,862

Click on a grant title below to expand the full details for that specific grant.


20145 grants / $160,001

Surface and Colloid Characterisation Facility$60,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamProfessor Vincent Craig, Dr Shannon Notley, Doctor Grant Webber, Professor Peter Kingshott, Professor Erica Wanless, Professor Sally McArthur, Professor Rob Atkin, Associate Professor Paul Stoddart, Associate Professor Andrew Clayton
SchemeEquipment Grant
RoleLead
Funding Start2014
Funding Finish2014
GNoG1300566
Type Of FundingInternal
CategoryINTE
UONY

Surface and Colloid Characterisation Facility$41,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Vincent Craig, Dr Shannon Notley, Doctor Grant Webber, Professor Peter Kingshott, Professor Erica Wanless, Professor Sally McArthur, Professor Rob Atkin, Associate Professor Paul Stoddart, Associate Professor Andrew Clayton
SchemeLinkage Infrastructure Equipment & Facilities (LIEF)
RoleLead
Funding Start2014
Funding Finish2014
GNoG1400581
Type Of FundingInternal
CategoryINTE
UONY

Surface and Colloid Characterisation Facility$41,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Vincent Craig, Dr Shannon Notley, Doctor Grant Webber, Professor Peter Kingshott, Professor Erica Wanless, Professor Sally McArthur, Professor Rob Atkin, Associate Professor Paul Stoddart, Associate Professor Andrew Clayton
SchemeLinkage Infrastructure Equipment & Facilities (LIEF)
RoleLead
Funding Start2014
Funding Finish2014
GNoG1400581
Type Of FundingScheme excluded from IGS
CategoryEXCL
UONY

Controlled Interactions in Multiphase Fluids$10,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Grant Webber, Professor Erica Wanless
SchemeNear Miss Grant
RoleLead
Funding Start2014
Funding Finish2014
GNoG1301393
Type Of FundingInternal
CategoryINTE
UONY

Critical salt effects in polymer brushes$8,001

Funding body: AINSE (Australian Institute of Nuclear Science & Engineering)

Funding bodyAINSE (Australian Institute of Nuclear Science & Engineering)
Project TeamProfessor Erica Wanless, Doctor Grant Webber
SchemeAINSE Award
RoleInvestigator
Funding Start2014
Funding Finish2014
GNoG1401383
Type Of FundingAust Competitive - Non Commonwealth
Category1NS
UONY

20132 grants / $335,000

Functional mesostructured materials in ionic liquids$180,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Gregory Warr, Professor Rob Atkin, Doctor Grant Webber
SchemeDiscovery Projects
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1300041
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

Nano-Optical Microscopy, Characterization and Fabrication Facility$155,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Andrew Fleming, Doctor John Holdsworth, Doctor Grant Webber, Professor Erich Kisi, Professor Dirk Van Helden
SchemeEquipment Grant
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1200167
Type Of FundingInternal
CategoryINTE
UONY

20121 grants / $1,200

International Association of Colloid and Interface Scientists (IACIS) Conference, Sendai, Japan, 13 - 18 May 2012$1,200

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Grant Webber
SchemeTravel Grant
RoleLead
Funding Start2012
Funding Finish2012
GNoG1200614
Type Of FundingInternal
CategoryINTE
UONY

20116 grants / $640,800

Next-generation polymer films for control of material interactions$300,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Erica Wanless, Doctor Grant Webber, Dr Steve Edmondson
SchemeDiscovery Projects
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1000042
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

Interfacial Mapping Facility$180,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Paul Dastoor, Laureate Professor Graeme Jameson, Professor Erica Wanless, Doctor Grant Webber, Professor Rob Atkin, Professor Ewa Goldys, Professor Deborah Kane, Dr James Downes, Dr Gregory Wilson, Doctor Chris Fell
SchemeLinkage Infrastructure Equipment & Facilities (LIEF)
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1000635
Type Of FundingScheme excluded from IGS
CategoryEXCL
UONY

Interfacial Mapping Facility$90,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamProfessor Paul Dastoor, Professor Erica Wanless, Doctor Grant Webber
SchemeEquipment Grant
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1000466
Type Of FundingInternal
CategoryINTE
UONY

Interfacial Mapping Facility$40,000

Funding body: CSIRO - Commonwealth Scientific and Industrial Research Organisation

Funding bodyCSIRO - Commonwealth Scientific and Industrial Research Organisation
Project TeamProfessor Paul Dastoor, Laureate Professor Graeme Jameson, Professor Erica Wanless, Doctor Grant Webber, Professor Rob Atkin, Professor Ewa Goldys, Professor Deborah Kane, Dr James Downes, Dr Gregory Wilson, Doctor Chris Fell
SchemeLinkage Infrastructure Equipment & Facilities (LIEF) Partner funding
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1100411
Type Of FundingOther Public Sector - Commonwealth
Category2OPC
UONY

Interfacial Mapping Facility$30,000

Funding body: Macquarie University

Funding bodyMacquarie University
Project TeamProfessor Paul Dastoor, Laureate Professor Graeme Jameson, Professor Erica Wanless, Doctor Grant Webber, Professor Rob Atkin, Professor Ewa Goldys, Professor Deborah Kane, Dr James Downes, Dr Gregory Wilson, Doctor Chris Fell
SchemeLinkage Infrastructure Equipment & Facilities (LIEF) Partner funding
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1100872
Type Of FundingScheme excluded from IGS
CategoryEXCL
UONY

UK Colloids, Canary Wharf, London UK, 4 - 6 July 2011$800

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Grant Webber
SchemeTravel Grant
RoleLead
Funding Start2011
Funding Finish2011
GNoG1100777
Type Of FundingInternal
CategoryINTE
UONY

20103 grants / $300,861

A Step Change in Fine Particle Beneficiation - Inverse Flotation$136,400

Funding body: Australian Coal Research Limited

Funding bodyAustralian Coal Research Limited
Project TeamLaureate Professor Kevin Galvin, Doctor Grant Webber, Professor John Ralston, Dr Catherine Whitby
SchemeAustralian Coal Association Research Program (ACARP)
RoleInvestigator
Funding Start2010
Funding Finish2010
GNoG1000115
Type Of FundingAust Competitive - Non Commonwealth
Category1NS
UONY

Soft matter and responsive materials characterisation facility$135,535

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamDr Raymond Dagastine, Laureate Professor Graeme Jameson, Doctor Grant Webber, Professor Rob Atkin, Professor Erica Wanless
SchemeLinkage Infrastructure Equipment & Facilities (LIEF)
RoleInvestigator
Funding Start2010
Funding Finish2010
GNoG1000397
Type Of FundingScheme excluded from IGS
CategoryEXCL
UONY

A new combined Atomic Force Microscopy and computer-simulation approach for improved modelling of particulate solids behaviour $28,926

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Roberto Moreno-Atanasio, Doctor Grant Webber
SchemePilot Grant
RoleLead
Funding Start2010
Funding Finish2010
GNoG0900065
Type Of FundingInternal
CategoryINTE
UONY
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Research Supervision

Current Supervision

CommencedResearch Title / Program / Supervisor Type
2015Bulk and Interfacial Structure in Solvate Ionic Liquids
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2015Polymeric Materials as Additives to Low Melting Point Salt Lubricants
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2015Large Scale Removal of NO From Process Gases
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Understanding Structural Changes in Responsive Polymer Brushes
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2013Next-Generation Polymer Films for Control of Material Interactions
Chemical Sciences, Faculty of Science and Information Technology
Co-Supervisor
2012IoNanofluids for Heat Transfer
Chemical Sciences, Faculty of Science and Information Technology
Co-Supervisor
2012The Impact of Surface-Induced Molecular Ordering on the Friction and Fluid Dynamics in Ionic Liquid Systems
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor

Past Supervision

YearResearch Title / Program / Supervisor Type
2015Selective Collection of Fine Particles by Water Drops
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Molecular Structure, Flow Properties and Particle Stability in Protic Ionic Liquids
Chemical Sciences, Faculty of Science and Information Technology
Co-Supervisor
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Dr Grant Webber

Position

Senior Lecturer
School of Engineering
Faculty of Engineering and Built Environment

Focus area

Chemical Engineering

Contact Details

Emailgrant.webber@newcastle.edu.au
Phone(02) 4033 9067
Fax(02) 4033 9095

Office

RoomA238
BuildingNIER - A Block
LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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