Dr Vicki Keast

Associate Professor

School of Mathematical and Physical Sciences (Physics)

Career Summary

Biography

Research Expertise
Physics

Qualifications

  • PhD, Lehigh University - USA
  • Bachelor of Science (Honours), University of Sydney
  • Master of Science, Lehigh University - USA

Keywords

  • Electron Microscopy
  • Physics
  • Solid state physics

Fields of Research

Code Description Percentage
020401 Condensed Matter Characterisation Technique Development 55
029999 Physical Sciences not elsewhere classified 30
091299 Materials Engineering not elsewhere classified 15

Professional Experience

UON Appointment

Title Organisation / Department
Associate Professor University of Newcastle
School of Mathematical and Physical Sciences
Australia

Academic appointment

Dates Title Organisation / Department
1/01/2005 - 1/06/2006 Senior Lecturer The University of Sydney
Electron Microscope Unit
Australia
1/01/2002 - 1/09/2006 Secretary Australian Microscopy and Microanalysis Society
Australia
1/01/2002 - 1/12/2005 Lecturer The University of Sydney
Electron Microscope Unit
Australia
1/08/1998 - 1/12/2001 Research Fellow University of Cambridge
Department of Materials Science and Metallurgy
United Kingdom

Membership

Dates Title Organisation / Department
Member - Australian Microscopy and Microanalysis Society Australian Microscopy and Microanalysis Society
Australia
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Chapter (3 outputs)

Year Citation Altmetrics Link
2006 Zou J, Liao X, Keast V, Cockayne DJH, 'Advanced Transmission Electron Microscopy Characterisation of Semiconductor Quantum Structures', Handbook of Semiconductor Nanostructures and Nanodevices, American Scientific Publishers, Stevenson Ranch, California, USA 61-92 (2006) [B2]
2003 Williams DB, Watanabe M, Li C, Keast VJ, 'Nanochemical and Nanostructural studies of the Brittle Failure of Alloys', Nano and microstructural design of advanced materials : a commemorative volume on Professor G. Thomas' seventieth birthday, Elsevier Ltd., Kidlington, Oxford, United Kingdom 11-22 (2003) [B1]
2003 Simpson AM, Sikorski A, Ringer SP, Keast VJ, 'Recent Advances in Specimen Preparation for the Materials Sciences', Science, Technology and Education of Microscopy: an Overview, Formatex, Madrid, Spain 34-42 (2003) [B2]

Journal article (55 outputs)

Year Citation Altmetrics Link
2015 De Silva KSB, Gentle A, Arnold M, Keast VJ, Cortie MB, 'Dielectric function and its predicted effect on localized plasmon resonances of equiatomic Au-Cu', Journal of Physics D: Applied Physics, 48 (2015)

Equiatomic (Au,Cu) solid solution orders below 658 K to form a tetragonal AuCu (I) phase with significant changes in physical properties and the crystal structure. The effect of o... [more]

Equiatomic (Au,Cu) solid solution orders below 658 K to form a tetragonal AuCu (I) phase with significant changes in physical properties and the crystal structure. The effect of ordering on the dielectric function of the material is controversial however, with inconsistent results reported in the literature. Since the nature of any localized surface plasmon resonance (LSPR) in the nanostructures is very sensitive to the dielectric function, this uncertainty hinders the use of AuCu in plasmonic devices or structures. Therefore, we re-examine the question using a combination of measurements and computations. We find that no significant change in the dielectric function occurs when this material becomes ordered, at least over the range of photon energies relevant to LSPRs. The likely properties of LSPRs in plasmonic devices made of AuCu are analyzed. Use of the alloy offers some advantages over pure Cu, however pure Au would still be the superior option in most situations.

DOI 10.1088/0022-3727/48/21/215304
2015 Keast VJ, Ewald J, De Silva KSB, Cortie MB, Monnier B, Cuskelly D, Kisi EH, 'Optical properties and electronic structure of the Cu-Zn brasses', Journal of Alloys and Compounds, 647 129-135 (2015)

The color of Cu-Zn brasses range from the red of copper through bright yellow to grey-silver as the Zn content increases. Here we examine the mechanism by which these color change... [more]

The color of Cu-Zn brasses range from the red of copper through bright yellow to grey-silver as the Zn content increases. Here we examine the mechanism by which these color changes occur. The optical properties of this set of alloys has been calculated using density functional theory (DFT) and compared to experimental spectroscopy measurements. The optical response of the low Zn content a-brasses is shown to have a distinctly different origin to that in the higher content ß', ¿ and e-brasses. The response of ß'-brass is unique in that it is strongly influenced by an overdamped plasmon excitation and this alloy will also have a strong surface plasmon response.

DOI 10.1016/j.jallcom.2015.06.136
Co-authors Erich Kisi
2015 Fletcher G, Arnold MD, Pedersen T, Keast VJ, Cortie MB, 'Multipolar and dark-mode plasmon resonances on drilled silver nano-triangles.', Opt Express, 23 18002-18013 (2015)
2014 McPherson DJ, Supansomboon S, Zwan B, Keast VJ, Cortie DL, Gentle A, et al., 'Strategies to control the spectral properties of Au-Ni thin films', THIN SOLID FILMS, 551 200-204 (2014) [C1]
DOI 10.1016/j.tsf.2013.11.115
Citations Scopus - 2Web of Science - 2
2014 Keast VJ, Barnett RL, Cortie MB, 'First principles calculations of the optical and plasmonic response of Au alloys and intermetallic compounds', JOURNAL OF PHYSICS-CONDENSED MATTER, 26 (2014) [C1]
DOI 10.1088/0953-8984/26/30/305501
Citations Scopus - 1Web of Science - 1
2014 Burgess RW, Keast VJ, 'TDDFT study of the optical absorption spectra of bare gold clusters', Journal of Physical Chemistry C, 118 3194-3201 (2014) [C1]

Time-dependent density functional theory (TDDFT) was used to calculate the optical absorption spectra of gold clusters of 20-171 atoms. The spectra for the smallest clusters agree... [more]

Time-dependent density functional theory (TDDFT) was used to calculate the optical absorption spectra of gold clusters of 20-171 atoms. The spectra for the smallest clusters agree with previous results, and the spectra for the largest clusters show features consistent with classical Mie theory. The systematic exploration of particles of sizes within these two extremes has allowed the trends linking optical absorption spectra and particle size and symmetry to be identified. A transition from molecular-like spectra to a more classical response is observed. © 2014 American Chemical Society.

DOI 10.1021/jp408545c
Citations Scopus - 10Web of Science - 10
2013 Keast VJ, Zwan B, Supansomboon S, Cortie MB, Persson POÅ, 'AuAl2 and PtAl2 as potential plasmonic materials', Journal of Alloys and Compounds, 577 581-586 (2013) [C1]
DOI 10.1016/j.jallcom.2013.06.161
Citations Scopus - 5Web of Science - 4
2013 Keast VJ, 'An introduction to the calculation of valence EELS: Quantum mechanical methods for bulk solids', MICRON, 44 93-100 (2013) [C1]
DOI 10.1016/j.micron.2012.08.001
Citations Scopus - 4Web of Science - 3
2013 Cortie MB, Coutts MJ, Ton-That C, Dowd A, Keast VJ, McDonagh AM, 'On the Coalescence of Nanoparticulate Gold Sinter Ink', JOURNAL OF PHYSICAL CHEMISTRY C, 117 11377-11384 (2013) [C1]
DOI 10.1021/jp401815b
Citations Scopus - 3Web of Science - 2
2012 Keast VJ, 'Application of EELS in materials science', Materials Characterization, 73 1-7 (2012) [C2]
Citations Scopus - 2Web of Science - 2
2012 Bosman M, Anstis GR, Keast VJ, Clarke JD, Cortie MB, 'Light splitting in nanoporous gold and silver', ACS Nano, 6 319-326 (2012) [C1]
Citations Scopus - 11Web of Science - 12
2011 Burgess RW, Keast VJ, 'TDDFT study of the optical absorption spectra of bare and coated Au(55) and Au(69) clusters', Journal of Physical Chemistry C, 115 21016-21021 (2011) [C1]
DOI 10.1021/jp207070n
Citations Scopus - 10Web of Science - 12
2011 Keast VJ, Legge KA, Koch CT, Supansomboon S, Cortie MB, 'The role of plasmons and interband transitions in the color of AuAl(2), AuIn(2), and AuGa(2)', Applied Physics Letters, 99 111908 (2011) [C1]
DOI 10.1063/1.3638061
Citations Scopus - 5Web of Science - 4
2011 Keast VJ, Gladys MJ, Petersen TC, Dwyer C, Koch CT, Haber T, Kothleitner G, 'Energy-filtered phase retrieval using the transport of intensity equation', Applied Physics Letters, 99 (2011) [C1]
Co-authors Michael Gladys
2009 Bosman M, Tang LJ, Ye JD, Tan ST, Zhang Y, Keast VJ, 'Nanoscale band gap spectroscopy on ZnO and GaN-based compounds with a monochromated electron microscope', Applied Physics Letters, 95 101110 (2009) [C1]
DOI 10.1063/1.3222974
Citations Scopus - 8Web of Science - 6
2009 Bosman M, Keast VJ, Watanabe M, McCulloch DG, Shakerzadeh M, Teo EHT, Tay BK, 'Quantitative, nanoscale mapping of sp2 percentage and crystal orientation in carbon multilayers', Carbon, 47 94-101 (2009) [C1]
DOI 10.1016/j.carbon.2008.09.033
Citations Scopus - 16Web of Science - 16
2009 Keast VJ, Harris S, Smith DK, 'Prediction of the stability of the Mn+1AXn phases from first principles', Physical Review B, 80 214113 (2009) [C1]
DOI 10.1103/PhysRevB.80.214113
Citations Scopus - 15Web of Science - 16
2008 Petersen TC, Bosman M, Keast VJ, Anstis GR, 'Plasmon resonances and electron phase shifts near Au nanospheres', Applied Physics Letters, 93 101909 (2008) [C1]
DOI 10.1063/1.2980505
Citations Scopus - 5Web of Science - 4
2008 Zeng A, Bilek MMM, McKenzie DR, Lay PA, La Fontaine A, Keast VJ, 'Correlation between film structures and potential limits for hydrogen and oxygen evolutions at a-C : N film electrochemical electrodes', Carbon, 46 663-670 (2008) [C1]
DOI 10.1016/j.carbon.2008.01.022
Citations Scopus - 10Web of Science - 10
2008 Keast VJ, Bosman M, 'Applications and theoretical simulation of low-loss electron energy-loss spectra', Materials Science and Technology, 24 651-659 (2008) [C1]
DOI 10.1179/174328408x270310
Citations Scopus - 5Web of Science - 5
2008 Petersen TC, Keast VJ, Paganin DJ, 'Quantitative TEM-based phase retrieval of MgO nano-cubes using the transport of intensity equation', Ultramicroscopy, 108 805-815 (2008) [C1]
DOI 10.1016/j.ultramic.2008.01.001
Citations Scopus - 19Web of Science - 17
2008 Bosman M, Keast VJ, 'Optimizing EELS acquisition', Ultramicroscopy, 108 837-846 (2008) [C1]
DOI 10.1016/j.ultramic.2008.02.003
Citations Scopus - 24Web of Science - 23
2008 Field MR, McCulloch DG, Lim SNH, Anders A, Keast VJ, Burgess RW, 'The electronic structure of tungsten oxide thin films prepared by pulsed cathodic arc deposition and plasma-assisted pulsed magnetron sputtering', Journal of Physics: Condensed Matter, 20 175216 (2008) [C1]
DOI 10.1088/0953-8984/20/17/175216
Citations Scopus - 4Web of Science - 3
2007 Petersen TC, Keast VJ, 'Astigmatic intensity equation for electron microscopy based phase retrieval', Ultramicroscopy, 107 635-643 (2007) [C1]
DOI 10.1016/j.ultramic.2006.12.005
Citations Scopus - 5Web of Science - 5
2007 Bosman M, Keast VJ, Watanabe M, Maaroof AI, Cortie MB, 'Mapping surface plasmons at the nanometre scale with an electron beam', Nanotechnology, 18 (2007) [C1]
DOI 10.1088/0957-4484/18/16/165505
Citations Scopus - 95Web of Science - 114
2007 Keast VJ, Bosman M, 'New developments in electron energy loss spectroscopy', Microscopy Research and Technique, 70 211-219 (2007) [C1]
DOI 10.1002/jemt.20407
Citations Scopus - 14Web of Science - 14
2007 Keast VJ, La Fontaine A, Du Plessis J, 'Variability in the segregation of bismuth between grain boundaries in copper', Acta Materialia, 55 5149-5155 (2007) [C1]
DOI 10.1016/j.actamat.2007.05.034
Citations Scopus - 14Web of Science - 13
2007 Petersen TC, Keast VJ, Johnson K, Duvall S, 'TEM-based phase retrieval of p-n junction wafers using the transport of intensity equation', Philosophical Magazine, 87 3565-3578 (2007) [C1]
DOI 10.1080/14786430701361388
Citations Web of Science - 10
2007 Bosman M, Keast VJ, Garcia-Munoz JL, D'Alfonso AJ, Findlay SD, Allen LJ, 'Two-dimensional mapping of chemical information at atomic resolution', Physical Review Letters, 99 (2007) [C1]
DOI 10.1103/physrevlett.99.086102
Citations Scopus - 142Web of Science - 123
2007 Anders A, Pasaja N, Lim SHN, Petersen TC, Keast VJ, 'Plasma biasing to control the growth conditions of diamond-like carbon', SURFACE & COATINGS TECHNOLOGY, 201 4628-4632 (2007) [C1]
DOI 10.1016/j.surfcoat.2006.09.313
Citations Scopus - 10Web of Science - 13
2007 Anders A, Pasaja N, Lim SHN, Petersen TC, Keast VJ, 'Plasma biasing to control the growth conditions of diamond-like carbon (vol 201, pg 4628, 2007)', SURFACE & COATINGS TECHNOLOGY, 202 414-415 (2007)
DOI 10.1016/j.surfcoat.2007.06.019
Citations Scopus - 1Web of Science - 1
2006 Bosman M, Watanabe M, Alexander DTL, Keast VJ, 'Mapping chemical and bonding information using multivariate analysis of electron energy-loss spectrum images', ULTRAMICROSCOPY, 106 1024-1032 (2006) [C1]
DOI 10.1016/j.ultramic.2006.04.016
Citations Scopus - 104Web of Science - 101
2006 Ma WJ, Ruys AJ, Zreiqat H, Mason R, Ringer SP, Liu ZW, et al., 'The biocompatibility of diamond-like carbon nano films', Proceedings of the 2006 International Conference on Nanoscience and Nanotechnology, ICONN, 274-277 (2006)

the sp3 (diamond like bonding) fraction and surface properties are the important determining factors among all structural and compositional characteristics which control the bioco... [more]

the sp3 (diamond like bonding) fraction and surface properties are the important determining factors among all structural and compositional characteristics which control the biocompatibility of diamond-like carbon (DLC) coating. Previous reports in this area have not adequately correlated these factors with coating optimization for specific biomedical applications. The present work is aimed at studying the effect of the structural and compositional properties on the biocompatibity of both hydrogenated and unhydrogenated tetrahedral DLC films produced by commercial deposition methods. Electron energy loss spectroscopy (EELS) and X-Ray photoelectron spectroscopy (XPS) were used for structural and compositional characterization. The human bone derived cells (HBDC) 3 day cell-culture showed good attachment to the DLC surfaces but no significant difference in morphology on different types of DLC. Blood protein adsorption study showed an increased albumin to fibrinogen ratio as the sp 3 fraction increases. © 2006 IEEE.

DOI 10.1109/ICONN.2006.340605
2006 La Fontaine A, Keast VJ, 'Compositional distributions in classical and lead-free brasses', MATERIALS CHARACTERIZATION, 57 424-429 (2006) [C1]
DOI 10.1016/j.matchar.2006.02.005
Citations Scopus - 34Web of Science - 16
2005 Keast VJ, 'Ab initio calculations of plasmons and interband transitions in the low-loss electron energy-loss spectrum', JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 143 97-104 (2005)
DOI 10.1016/j.elspec.2004.04.005
Citations Scopus - 35Web of Science - 35
2004 Bosman M, Sitarz M, Sikorski AZ, Keast VJ, 'Measurements of composition and electronic structure in an operating light-emitting diode using analytical electron microscopy', APPLIED PHYSICS LETTERS, 84 1371-1373 (2004) [C1]
DOI 10.1063/1.1649798
Citations Scopus - 2Web of Science - 2
2004 Stevens KJ, Levi T, Minchington I, Briggs N, Keast V, Bulcock S, 'Transmission electron microscopy of high pressure metal dusted 316 stainless steel', MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 385 292-299 (2004) [C1]
DOI 10.1016/j.msea.2004.06.057
Citations Scopus - 13Web of Science - 10
2004 Yeoh WK, Horvat J, Dou SX, Keast V, 'Strong pinning and high critical current density in carbon nanotube doped MgB2', SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 17 S572-S577 (2004) [C1]
DOI 10.1088/0953-2048/17/9/022
Citations Scopus - 38Web of Science - 33
2004 Keast VJ, 'Bandstructure calculations for the simulation of low-loss EELS and plasmon energies', Microscopy and Microanalysis, 10 854-855 (2004)
DOI 10.1017/S1431927604881029
2003 Keast VJ, Kappers MJ, Humphreys CJ, 'Electron energy-loss near edge structure (ELNES) of InGaN quantum wells', JOURNAL OF MICROSCOPY-OXFORD, 210 89-93 (2003) [C1]
DOI 10.1046/j.1365-2818.2003.01180.x
Citations Scopus - 13Web of Science - 14
2002 Keast VJ, Scott AJ, Kappers MJ, Foxon CT, Humphreys CJ, 'Electronic structure of GaN and InxGa1-xN measured with electron energy-loss spectroscopy', PHYSICAL REVIEW B, 66 (2002) [C1]
DOI 10.1103/PhysRevB.66.125319
Citations Scopus - 45Web of Science - 44
2001 Keast VJ, 'Experimental verification of the electronic structure of MgB2 using electron energy-loss spectroscopy', APPLIED PHYSICS LETTERS, 79 3491-3493 (2001)
DOI 10.1063/1.1419051
Citations Scopus - 6Web of Science - 6
2001 Keast VJ, Scott AJ, Brydson R, Williams DB, Bruley J, 'Electron energy-loss near-edge structure - a tool for the investigation of electronic structure on the nanometre scale', JOURNAL OF MICROSCOPY, 203 135-175 (2001) [C1]
DOI 10.1046/j.1365-2818.2001.00898.x
Citations Scopus - 98Web of Science - 93
2001 Keast VJ, Misra A, Kung H, Mitchell TE, 'Compositional distributions in nanoscale metallic multilayers studied using x-ray mapping', JOURNAL OF MATERIALS RESEARCH, 16 2032-2038 (2001) [C1]
DOI 10.1557/JMR.2001.0278
Citations Scopus - 5Web of Science - 3
2001 Keast V, 'Electronic Structure of MgB2 measured using electron energy-loss spectroscopy', Applied Physics Letters, 79 3491-3493 (2001) [C1]
2001 Keast VJ, Williams DB, 'Grain boundary chemistry', CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE, 5 23-30 (2001)
DOI 10.1016/S1359-0286(00)00029-2
Citations Scopus - 11Web of Science - 12
2001 Keast V, Williams DB, 'Grain Boundary Segregation', Current Opinion in Solid State and Materials Science, 5 23-30 (2001) [C1]
2000 Keast VJ, Williams DB, 'Quantification of boundary segregation in the analytical electron microscope', JOURNAL OF MICROSCOPY, 199 45-55 (2000) [C1]
DOI 10.1046/j.1365-2818.2000.00694.x
Citations Scopus - 34Web of Science - 34
1999 Williams DB, Carpenter DT, Keast V, 'Can analytical electron microscopy tell us why materials break?', Microscopy and Analysis, 73 17-19 (1999) [C1]
1999 Ozkaya D, Zhou WZ, Thomas JM, Midgley P, Keast VJ, Hermans S, 'High-resolution imaging of nanoparticle bimetallic catalysts supported on mesoporous silica', CATALYSIS LETTERS, 60 113-120 (1999) [C1]
DOI 10.1023/A:1019046705386
Citations Scopus - 43Web of Science - 45
1999 Keast VJ, Williams DB, 'Quantitative compositional mapping of Bi segregation to grain boundaries in Cu', ACTA MATERIALIA, 47 3999-4008 (1999) [C1]
DOI 10.1016/S1359-6454(99)00260-8
Citations Scopus - 58Web of Science - 53
1999 Bruley J, Keast VJ, Williams DB, 'An EELS study of segregation-induced grain-boundary embrittlement of copper', ACTA MATERIALIA, 47 4009-4017 (1999) [C1]
DOI 10.1016/S1359-6454(99)00261-X
Citations Scopus - 18Web of Science - 16
1998 Keast VJ, Bruley J, Rez P, Maclaren JM, Williams DB, 'Chemistry and bonding changes associated with the segregation of Bi to grain boundaries in Cu', ACTA MATERIALIA, 46 481-490 (1998) [C1]
DOI 10.1016/S1359-6454(97)00262-0
Citations Scopus - 30Web of Science - 32
1996 Bruley J, Keast V, Williams DB, 'Measurement of the localised electronic structure associated with bismuth segregation to copper grain boundaries', Journal of Physics D: Applied Physics, 29 1730-1739 (1996) [C1]
Citations Scopus - 20Web of Science - 23
1994 Davis CA, Yin Y, McKenzie DR, Hall LE, Kravtchinshaia E, Keast V, et al., 'The structure of Boron-,Phosphorus- and Nitrogen-doped tetrahedral amorphous carbon deposited by cathodic arc', Journal of Non-Crystalline Solids, 170 46-50 (1994) [C1]
Citations Scopus - 38Web of Science - 39
Show 52 more journal articles

Conference (26 outputs)

Year Citation Altmetrics Link
2014 Shahcheraghi N, Dowd A, McDonagh A, Cortie MB, Keast V, 'Multimode plasmon resonances on double- and triple-decker stacks of silver nanotriangles', Proceedings of the 2014 International Conference on Nanoscience and Nanotechnology, ICONN 2014 (2014) [E1]
DOI 10.1109/ICONN.2014.6965261
2011 Keast VJ, Burgess RW, 'Atomic structure, electronic structure and optical response of metal nanoparticles', Book of Abstracts. XXII International Congress and General Assembly of the International Union of Crystallography, Madrid, Spain (2011) [E3]
2009 Keast VJ, Bosman M, Petersen TC, 'Measuring and mapping surface plasmons with nanometre scale resolution in the electron microscope', Nanophotonics Down Under 2009: Devices and Applications: Program, Melbourne, VIC (2009) [E2]
2008 Allen LJ, D'Alfonso AJ, Bosman M, Findlay SD, Oxley MP, Keast VJ, et al., 'Simulation of atomic resolution images in STEM', Microscopy and Microanalysis, Albuquerqe, New Mexico (2008) [E3]
DOI 10.1017/s1431927608082019
2008 Allen LJ, D'Alfonso AJ, Findlay SD, Oxley MP, Bosman M, Keast VJ, et al., 'Theoretical interpretation of electron energy-loss spectroscopic images', Electron Microscopy and Multiscale Modeling: Proceedings of the EMMM-2007 International Conference, Moscow, Russia (2008) [E1]
DOI 10.1063/1.2918115
Citations Scopus - 2Web of Science - 2
2006 Keast VJ, Bosman M, 'DFT Calculations in Electron Energy Loss Spectroscopy (EELS): The low-loss part of the spectrum and optical properties', Density Functional Theory in Electron Microscopy, Vienna, Austria (2006) [E3]
2006 Ma MJ, Ruys AJ, Mason R, Zreiqat H, Cheung WY, Wong SP, et al., 'Effect of composition of diamond-like carbon films on surface properties and biocompatibility', Proceedings of the Fourth IASTED International Conference on Biomedical Engineering, Innsbruck, Austria (2006) [E1]
2006 Ma WJ, Ruyst AJ, Zreiqat H, Masont R, Ringert SP, Liut ZW, et al., 'The biocompatibility of diamond-like carbon nano films', 2006 INTERNATIONAL CONFERENCE ON NANOSCIENCE AND NANOTECHNOLOGY, VOLS 1 AND 2, Brisbane, AUSTRALIA (2006) [E1]
2006 Keast VJ, Bosman M, 'Electron energy-loss spectroscopy: Measuring optical properties at the nanometre scale', 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings (2006) [E1]

Electron energy-loss spectroscopy (EELS) is widely used to study the composition and electronic structure of materials at the nanometre scale. The low-loss region of the EEL spect... [more]

Electron energy-loss spectroscopy (EELS) is widely used to study the composition and electronic structure of materials at the nanometre scale. The low-loss region of the EEL spectrum (< ~50 eV) is of particular interest for the study of optical properties. Examples of the applications of EELS to measure the optical properties, and, in particular, of individual nanoparticles will be presented. Comparison to calculations of optical properties and EEL spectra using density functional theory will be given.

2001 Keast VJ, Scott AJ, Kappers MJ, Humphreys CJ, 'Electronic structure of GaN studied with electron energy loss spectroscopy and density functional theory', ELECTRON MICROSCOPY AND ANALYSIS 2001, UNIV DUNDEE, DUNDEE, SCOTLAND (2001) [E1]
2001 Keast VJ, Sharma N, Humphreys CJ, 'Energy-loss spectroscopy of GaN alloys and quantum wells', MICROSCOPY OF SEMICONDUCTING MATERIALS 2001, UNIV OXFORD, OXFORD, ENGLAND (2001) [E1]
2000 Sharma N, Tricker D, Keast V, Hooper S, Heffernan J, Barnes J, et al., 'Effect of the buffer layer on the structure, mobility and photoluminescence of MBE grown GaN' (2000) [E1]
2000 Keast VJ, Kung H, Misra A, Mitchell TE, 'Compositional mapping of nanolayered metal composites', MICROBEAM ANALYSIS 2000, PROCEEDINGS, KAILUA KONA, HI (2000)
2000 Williams DB, Keast VJ, 'Tailoring grain-boundary segregation to control mechanical properties', INTERFACIAL ENGINEERING FOR OPTIMIZED PROPERTIES II, BOSTON, MA (2000) [E1]
1999 Keast VJ, Midgley PA, Lloyd SJ, Thomas PJ, Weyland M, Boothroyd CB, Humphreys CJ, 'Composition of grain boundaries and interfaces: A comparison of modern analytical techniques using a 300 kV FEGTEM', ELECTRON MICROSCOPY AND ANALYSIS 1999, UNIV SHEFFIELD, SHEFFIELD, ENGLAND (1999) [E1]
Citations Web of Science - 1
1999 Keast VJ, Misra A, Kung H, Mitchell TE, Humphreys CJ, 'Compositional mapping of nanoscale metallic multilayers: a comparison of techniques', ELECTRON MICROSCOPY AND ANALYSIS 1999, UNIV SHEFFIELD, SHEFFIELD, ENGLAND (1999) [E1]
Citations Web of Science - 2
1999 Sharma N, Keast VJ, Iwayama TS, Boyd I, Humphreys CJ, 'Characterisation of silicon nanocrystals in silica and correlation with luminescence', ELECTRON MICROSCOPY AND ANALYSIS 1999, UNIV SHEFFIELD, SHEFFIELD, ENGLAND (1999) [E1]
1999 Humphreys CJ, Botton GA, Pankhurst DA, Keast VJ, Temmerman WM, 'Electronic structure, charge transfer and bonding in intermetallics using EELS and density functional theory', Materials Research Society Symposium - Proceedings (1999) [E1]

Electron energy loss spectroscopy and density functional theory have been used to show that there is a covalent component to the bonding in NiAl, CoAl and FeAl, between the transi... [more]

Electron energy loss spectroscopy and density functional theory have been used to show that there is a covalent component to the bonding in NiAl, CoAl and FeAl, between the transition metal atom and Al. There is no charge transfer and no ionic component to the bonding in NiAl and probably not in CoAl and FeAl. The bonding in non-stoichiometric NiAl is studied. Preliminary results are given for a £3 boundary in NiAl. © 1999 Materials Research Society.

1998 Williams DB, Keast VJ, Watanabe M, Carpenter DT, 'Segregation to interfaces in metals and alloys', ELECTRON MICROSCOPY 1998, VOL 2, CANCUN, MEXICO (1998)
1998 Keast VJ, Williams DB, 'Application of high resolution X-ray mapping to grain boundary segregation', ELECTRON MICROSCOPY 1998, VOL 2, CANCUN, MEXICO (1998)
1998 Keast VJ, Kung H, Mitchell TE, Misra A, 'Elemental mapping of nanoscale Cu/Nb multilayers', ELECTRON MICROSCOPY 1998, VOL 3, CANCUN, MEXICO (1998)
1998 Williams DB, Watanabe M, Carpenter DT, Keast V, Ito Y, 'Nanometer-scale microanalysis of interfaces in thin films' (1998) [E1]
1997 Voelkl E, Allard LF, Bruley J, Keast V, Williams DB, 'The teaching of TEM by telepresence microscopy over the internet' (1997) [E1]
Citations Web of Science - 1
1997 Keast V, Bruley J, Williams DB, 'Investigations of the bonding changes associated with grain boundary embrittlement' (1997) [E1]
1997 Keast V, Williams DB, 'Investigations of grain boundary embrittlement in the STEM' (1997) [E1]
1995 BRULEY J, WILLIAMS DB, KEAST V, 'Electron energy-loss fine structure studies of interfaces', MICROBEAM ANALYSIS 1995, BRECKENRIDGE, CO (1995)
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Grants and Funding

Summary

Number of grants 11
Total funding $3,082,152

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


20121 grants / $90,000

Quest for zero optical loss$90,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Professor Michael Cortie, Doctor Vicki Keast
Scheme Discovery Projects
Role Lead
Funding Start 2012
Funding Finish 2012
GNo G1101208
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

20092 grants / $720,000

20073 grants / $687,152

New nanolaminate ternary and quaternary alloy phases by thin film synthesis$614,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team
Scheme Discovery Projects
Role Investigator
Funding Start 2007
Funding Finish 2007
GNo
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

New nanolaminate ternary and quaternary alloy phases by thin film synthesis$61,500

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Doctor Vicki Keast, Professor Marcela Bilek, Dr Richard Tarrant, Professor Jochen Schneider
Scheme Discovery Projects
Role Lead
Funding Start 2007
Funding Finish 2007
GNo G0187799
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

Predicting surface plasmons and optical properties at metal surfaces and nanostructures$11,652

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Doctor Vicki Keast
Scheme New Staff Grant
Role Lead
Funding Start 2007
Funding Finish 2007
GNo G0187336
Type Of Funding Internal
Category INTE
UON Y

20062 grants / $239,714

Development of a Novel and Quantitative Approach to Phase Imaging with Applications to Fuctional Nanomaterials$229,714

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Doctor Vicki Keast
Scheme Linkage Projects
Role Lead
Funding Start 2006
Funding Finish 2006
GNo G0187282
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

Mapping electronic structure and material properties with atomic resolution.$10,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Doctor Vicki Keast
Scheme Discovery Projects
Role Lead
Funding Start 2006
Funding Finish 2006
GNo G0187213
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

20042 grants / $1,018,286

Advanced Spectroscopy for Nano-characterisation of Materials Chemistry and Properties$897,000

Funding body: Australian Research Council

Funding body Australian Research Council
Project Team
Scheme Linkage Infrastructure Equipment & Facilities (LIEF)
Role Lead
Funding Start 2004
Funding Finish 2004
GNo
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

Development of a novel and quantitative approach to phase imaging with applications to functional nanomaterials.$121,286

Funding body: Australian Research Council

Funding body Australian Research Council
Project Team
Scheme Unknown
Role Lead
Funding Start 2004
Funding Finish 2006
GNo
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

20031 grants / $327,000

Mapping electronic structure and material properties with atomic resolution.$327,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team
Scheme Discovery Projects
Role Lead
Funding Start 2003
Funding Finish 2006
GNo
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y
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Research Supervision

Current Supervision

Commenced Research Title / Program / Supervisor Type
2007 Predicting Surface Plasmons
Physics, University of Newcastle
Sole Supervisor
2003 Mapping Material Properties with EEL spectrum images
Physics, University of Sydney
Principal Supervisor

Past Supervision

Year Research Title / Program / Supervisor Type
2012 A TDDFT Study of the Optical Absorption Spectra of Gold and Silver Clusters
Physics, Faculty of Science and Information Technology
Principal Supervisor
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Dr Vicki Keast

Position

Associate Professor
School of Mathematical and Physical Sciences
Faculty of Science and Information Technology

Focus area

Physics

Contact Details

Email vicki.keast@newcastle.edu.au
Phone (02) 4921 6653
Fax (02) 4921 6907

Office

Room P115
Building Physics
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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