Dr Michael Ruppert

Dr Michael Ruppert

Research Associate

School of Electrical Engineering and Computing

Career Summary

Biography

Michael Ruppert received the Dipl.-Ing. Degree with excellence in automation technology in production, with a specialization in systems theory and automatic control, from the University of Stuttgart, Germany, in 2013. In 2017, he received the Ph.D. degree in electrical engineering from The University of Newcastle, Australia where he is now a Postdoctoral Research Associate with the School of Electrical Engineering and Computing. As a Visiting Researcher, he was with the Mechanical Engineering Department, University of Texas at Dallas, USA. His research interests include the control, estimation and self-sensing of microelectromechanical (MEMS) systems such as piezoelectric microcantilever and nanopositioning systems for multifrequency and single-chip atomic force microscopy.

Dr. Ruppert received the Academic Merit Scholarship from the University of Stuttgart, the Baden-Württemberg Scholarship, and held Postgraduate Research Scholarships with the University of Newcastle and with the CSIRO, Clayton, VIC, Australia. Dr. Ruppert's research has been recognized with the 2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM) Best Conference Paper Finalist Award and with The University of Newcastle FEBE Postgraduate Research Prize in 2014 and 2016.


Qualifications

  • Doctor of Philosophy, University of Newcastle
  • Master of Science, University of Stuttgart - Germany

Keywords

  • Atomic Force Microscopy
  • Control Systems
  • Mechatronics
  • Microelectromechanical systems (MEMS)
  • Nanotechnology
  • Signal Processing
  • Smart Structures

Languages

  • German (Mother)
  • English (Fluent)
  • French (Working)

Fields of Research

Code Description Percentage
091304 Dynamics, Vibration and Vibration Control 40
091306 Microelectromechanical Systems (MEMS) 40
090699 Electrical and Electronic Engineering not elsewhere classified 20

Professional Experience

UON Appointment

Title Organisation / Department
Research Associate

Design, fabrication and instrumentation of piezoelectric microcantilevers for multifrequency atomic force microscopy and high-resolution mass-sensing. High-bandwidth, low-noise demodulation techniques for multifrequency atomic force microscopy.

University of Newcastle
School of Electrical Engineering and Computing
Australia
Casual Academic University of Newcastle
School of Electrical Engineering and Computing
Australia

Academic appointment

Dates Title Organisation / Department
1/08/2015 - 1/08/2016 Visiting Researcher

Fabrication of piezoelectric microcantilevers and nanotips in the clean room. Research and development of a MEMS-based on-chip atomic force microscope. Analysis of process stability of a scanning tunneling microscope enabled nanolithography in collaboration with industry.Planning and setup of the Laboratory for Dynamics and Control of Nanosystems (LDCN).

University of Texas Dallas
Erik Jonsson School of Engineering and Computer Science
United States

Awards

Award

Year Award
2016 FEBE Postgraduate Research Prize
Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
2014 FEBE Postgraduate Research Prize
Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
2013 Best Student Paper Finalist
IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
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Publications

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


Journal article (11 outputs)

Year Citation Altmetrics Link
2017 Moore SI, Ruppert MG, Yong YK, 'Multimodal cantilevers with novel piezoelectric layer topology for sensitivity enhancement', BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 8 358-371 (2017) [C1]
DOI 10.3762/bjnano.8.38
Citations Scopus - 1Web of Science - 1
Co-authors Yuenkuan Yong
2017 Ragazzon MRP, Ruppert MG, Harcombe DM, Fleming AJ, Tommy Gravdahl J, 'Lyapunov Estimator for High-Speed Demodulation in Dynamic Mode Atomic Force Microscopy', IEEE Transactions on Control Systems Technology, (2017)

In dynamic mode atomic force microscopy (AFM), the imaging bandwidth is governed by the slowest component in the open-loop chain consisting of the vertical actuator, cantilever, a... [more]

In dynamic mode atomic force microscopy (AFM), the imaging bandwidth is governed by the slowest component in the open-loop chain consisting of the vertical actuator, cantilever, and demodulator. While the common demodulation method is to use a lock-in amplifier (LIA), its performance is ultimately bounded by the bandwidth of the postmixing low-pass filters. This brief proposes an amplitude and phase estimation method based on a strictly positive real Lyapunov design approach. The estimator is designed to be of low complexity while allowing for high bandwidth. In addition, suitable gains for high performance are suggested such that no tuning is necessary. The Lyapunov estimator is experimentally implemented for amplitude demodulation and shown to surpass the LIA in terms of tracking bandwidth and noise performance. High-speed AFM images are presented to corroborate the results.

DOI 10.1109/TCST.2017.2692721
Citations Scopus - 1
Co-authors Andrew Fleming
2017 Ruppert MG, Harcombe DM, Ragazzon MRP, Moheimani SOR, Fleming AJ, 'A review of demodulation techniques for amplitude-modulation atomic force microscopy', BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 8 1407-1426 (2017) [C1]
DOI 10.3762/bjnano.8.142
Co-authors Reza Moheimani, Andrew Fleming
2017 Ruppert MG, Yong YK, 'Note: Guaranteed collocated multimode control of an atomic force microscope cantilever using on-chip piezoelectric actuation and sensing', Review of Scientific Instruments, 88 (2017) [C1]

© 2017 Author(s). The quality (Q) factor is an important parameter of the resonance of the microcantilever as it determines both imaging bandwidth and force sensitivity. The abil... [more]

© 2017 Author(s). The quality (Q) factor is an important parameter of the resonance of the microcantilever as it determines both imaging bandwidth and force sensitivity. The ability to control the Q factor of multiple modes is believed to be of great benefit for atomic force microscopy techniques involving multiple eigenmodes. In this paper, we propose a novel cantilever design employing multiple piezoelectric transducers which are used for separated actuation and sensing, leading to guaranteed collocation of the first eight eigenmodes up to 3 MHz. The design minimizes the feedthrough usually observed with these systems by incorporating a guard trace on the cantilever chip. As a result, a multimode Q controller is demonstrated to be able to modify the quality factor of the first two eigenmodes over up to four orders of magnitude without sacrificing robust stability.

DOI 10.1063/1.4990451
Co-authors Yuenkuan Yong
2017 Ruppert MG, Fowler AG, Maroufi M, Moheimani SOR, 'On-chip dynamic mode atomic force microscopy: A silicon-on-insulator MEMS approach', Journal of Microelectromechanical Systems, 26 215-225 (2017)

© 1992-2012 IEEE. The atomic force microscope (AFM) is an invaluable scientific tool; however, its conventional implementation as a relatively costly macroscale system is a barri... [more]

© 1992-2012 IEEE. The atomic force microscope (AFM) is an invaluable scientific tool; however, its conventional implementation as a relatively costly macroscale system is a barrier to its more widespread use. A microelectromechanical systems (MEMS) approach to AFM design has the potential to significantly reduce the cost and complexity of the AFM, expanding its utility beyond current applications. This paper presents an on-chip AFM based on a silicon-on-insulator MEMS fabrication process. The device features integrated xy electrostatic actuators and electrothermal sensors as well as an AlN piezoelectric layer for out-of-plane actuation and integrated deflection sensing of a microcantilever. The three-degree-of-freedom design allows the probe scanner to obtain topographic tapping-mode AFM images with an imaging range of up to µ m× 8µ m in closed loop. [2016-0211]

DOI 10.1109/JMEMS.2016.2628890
Citations Scopus - 3Web of Science - 2
Co-authors Reza Moheimani
2016 Ruppert MG, Moheimani SOR, 'Multimode Q Control in Tapping-Mode AFM: Enabling Imaging on Higher Flexural Eigenmodes', IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, 24 1149-1159 (2016) [C1]
DOI 10.1109/TCST.2015.2478077
Citations Scopus - 9Web of Science - 4
Co-authors Reza Moheimani
2016 Ruppert MG, Karvinen KS, Wiggins SL, Moheimani SOR, 'A Kalman Filter for Amplitude Estimation in High-Speed Dynamic Mode Atomic Force Microscopy', IEEE Transactions on Control Systems Technology, 24 276-284 (2016) [C1]

© 2015 IEEE. A fundamental challenge in dynamic mode atomic force microscopy (AFM) is the estimation of the cantilever oscillation amplitude from the deflection signal, which mig... [more]

© 2015 IEEE. A fundamental challenge in dynamic mode atomic force microscopy (AFM) is the estimation of the cantilever oscillation amplitude from the deflection signal, which might be distorted by noise and/or high-frequency components. When the cantilever is excited at resonance, its deflection is typically obtained via narrow-band demodulation using a lock-in amplifier (LIA). However, the bandwidth of this measurement technique is ultimately bounded by the low-pass filter, which must be employed after demodulation to attenuate the component at twice the carrier frequency. Furthermore, to measure the amplitude of multiple frequency components, such as higher eigenmodes and/or higher harmonics in multifrequency AFM, multiple LIAs must be employed. In this paper, the authors propose the estimation of amplitude and phase using a linear time-varying Kalman filter that is easily extended to multiple frequencies. Experimental results are obtained using square-modulated sine waves and closed-loop AFM scans, verifying the performance of the proposed Kalman filter.

DOI 10.1109/TCST.2015.2435654
Citations Scopus - 8Web of Science - 4
Co-authors Reza Moheimani
2016 Ruppert MG, Moheimani SOR, 'High-bandwidth multimode self-sensing in bimodal atomic force microscopy', Beilstein Journal of Nanotechnology, 7 284-295 (2016) [C1]

© 2016 Ruppert and Moheimani; licensee Beilstein-Institut. License and terms: see end of document. Using standard microelectromechanical system (MEMS) processes to coat a microca... [more]

© 2016 Ruppert and Moheimani; licensee Beilstein-Institut. License and terms: see end of document. Using standard microelectromechanical system (MEMS) processes to coat a microcantilever with a piezoelectric layer results in a versatile transducer with inherent self-sensing capabilities. For applications in multifrequency atomic force microscopy (MF-AFM), we illustrate that a single piezoelectric layer can be simultaneously used for multimode excitation and detection of the cantilever deflection. This is achieved by a charge sensor with a bandwidth of 10 MHz and dual feedthrough cancellation to recover the resonant modes that are heavily buried in feedthrough originating from the piezoelectric capacitance. The setup enables the omission of the commonly used piezoelectric stack actuator and optical beam deflection sensor, alleviating limitations due to distorted frequency responses and instrumentation cost, respectively. The proposed method benefits from a more than two orders of magnitude increase in deflection to strain sensitivity on the fifth eigenmode leading to a remarkable signal-to-noise ratio. Experimental results using bimodal AFM imaging on a two component polymer sample validate that the self-sensing scheme can therefore be used to provide both the feedback signal, for topography imaging on the fundamental mode, and phase imaging on the higher eigenmode.

DOI 10.3762/bjnano.7.26
Citations Scopus - 6Web of Science - 4
Co-authors Reza Moheimani
2016 Ruppert MG, Harcombe DM, Moheimani SOR, 'High-Bandwidth Demodulation in MF-AFM: A Kalman Filtering Approach', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 21 2705-2715 (2016) [C1]
DOI 10.1109/TMECH.2016.2574640
Citations Scopus - 4Web of Science - 2
Co-authors Reza Moheimani
2014 Karvinen KS, Ruppert MG, Mahata K, Moheimani SOR, 'Direct tip-sample force estimation for high-speed dynamic mode atomic force microscopy', IEEE Transactions on Nanotechnology, 13 1257-1265 (2014) [C1]

© 2002-2012 IEEE. We present new insights into the modeling of the microcantilever in dynamic mode atomic force microscopy and outline a novel high-bandwidth tip-sample force est... [more]

© 2002-2012 IEEE. We present new insights into the modeling of the microcantilever in dynamic mode atomic force microscopy and outline a novel high-bandwidth tip-sample force estimation technique for the development of high-bandwidth z -axis control. Fundamental to the proposed technique is the assumption that in tapping mode atomic force microscopy, the tip-sample force takes the form of an impulse train. Formulating the estimation problem as a Kalman filter, the tip-sample force is estimated directly; thus, potentially enabling high-bandwidth z-axis control by eliminating the dependence of the control technique on microcantilever dynamics and the amplitude demodulation technique. Application of this technique requires accurate knowledge of the models of the microcantilever; a novel identification method is proposed. Experimental data are used in an offline analysis for verification.

DOI 10.1109/TNANO.2014.2360878
Citations Scopus - 10Web of Science - 10
Co-authors Reza Moheimani, Kaushik Mahata
2013 Ruppert MG, Moheimani SOR, 'A novel self-sensing technique for tapping-mode atomic force microscopy', Review of Scientific Instruments, 84 (2013) [C1]
DOI 10.1063/1.4841855
Citations Scopus - 12Web of Science - 13
Co-authors Reza Moheimani
Show 8 more journal articles

Conference (9 outputs)

Year Citation Altmetrics Link
2017 Ruppert MG, Harcombe DM, Ragazzon MRP, Moheimani SOR, Fleming AJ, 'Frequency domain analysis of robust demodulators for high-speed atomic force microscopy', Proceedings of the 2017 American Control Conference (2017) [E1]
DOI 10.23919/ACC.2017.7963175
Citations Scopus - 1
Co-authors Reza Moheimani, Andrew Fleming
2017 Maroufi M, Ruppert MG, Fowler AG, Moheimani SOR, 'Design and control of a single-chip SOI-MEMS atomic force microscope', Proceedings of the 2017 American Control Conference (2017) [E1]
DOI 10.23919/ACC.2017.7963386
Co-authors Reza Moheimani
2017 Harcombe DM, Ruppert MG, Ragazzon MRP, Fleming AJ, 'Higher-harmonic AFM Imaging with a High-Bandwidth Multifrequency Lyapunov Filter', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM (2017)

© 2017 IEEE. A major difficulty in multifrequency atomic force microscopy (MF-AFM) is the accurate estimation of amplitude and phase at multiple frequencies for both z-axis feedb... [more]

© 2017 IEEE. A major difficulty in multifrequency atomic force microscopy (MF-AFM) is the accurate estimation of amplitude and phase at multiple frequencies for both z-axis feedback and material contrast imaging. A lock-in amplifier is typically chosen for its narrowband response and ease of implementation. However, its bandwidth is limited due to post mixing lowpass filters and multiple are required in parallel for MF-AFM. This paper proposes a multifrequency demodulator in the form of a model-based Lyapunov filter implemented on a Field Programmable Gate Array (FPGA). System modelling and simulations are verified by experimental results demonstrating high tracking bandwidth and off-mode rejection at modelled frequencies. Additionally, AFM scans with a five-frequencybased system are presented wherein higher harmonic imaging is performed up to 1 MHz.

DOI 10.1109/AIM.2017.8014103
Citations Scopus - 1
Co-authors Andrew Fleming
2017 Moore SI, Ruppert MG, Yong YK, 'Design and Analysis of Piezoelectric Cantilevers with Enhanced Higher Eigenmodes for Atomic Force Microscopy', IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM (2017)

© 2017 IEEE. Atomic force microscope (AFM) cantilevers with integrated actuation and sensing provide several distinct advantages over conventional cantilever instrumentation such... [more]

© 2017 IEEE. Atomic force microscope (AFM) cantilevers with integrated actuation and sensing provide several distinct advantages over conventional cantilever instrumentation such as clean frequency responses, the possibility of down-scaling and parallelization to cantilever arrays as well as the absence of optical interferences. However, for multifrequency AFM techniques involving higher eigenmodes of the cantilever, optimization of the transducer location and layout has to be taken into account. This work proposes multiple integrated piezoelectric regions on the cantilever which maximize the deflection of the cantilever and the piezoelectric charge response for a given higher eigenmode based on the spatial strain distribution. Finite element analysis is performed to find the optimal transducer topology and experimental results are presented which highlight an actuation gain improvement up to 42 dB on the third mode and sensor sensitivity improvement up to 38 dB on the second mode.

DOI 10.1109/AIM.2017.8014102
Co-authors Yuenkuan Yong
2016 Moheimani SOR, Fowler A, Maroufi M, Ruppert M, 'On-chip Atomic Force Microscopy: Mechatronic System Design and Control', 2016 AMERICAN CONTROL CONFERENCE (ACC) (2016)
Co-authors Reza Moheimani
2016 Ruppert MG, Harcombe DM, Reza Moheimani SO, 'State estimation for high-speed multifrequency atomic force microscopy', Proceedings of the 2016 American Control Conference (2016) [E1]
DOI 10.1109/ACC.2016.7525311
Citations Scopus - 3Web of Science - 2
Co-authors Reza Moheimani
2016 Ruppert MG, Moheimani SOR, 'MULTI-MODE Q CONTROL IN MULTIFREQUENCY ATOMIC FORCE MICROSCOPY', INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE, 2015, VOL 4 (2016)
Citations Scopus - 2
Co-authors Reza Moheimani
2014 Ruppert MG, Moheimani SOR, 'Novel reciprocal self-sensing techniques for tapping-mode atomic force microscopy', IFAC Proceedings Volumes (IFAC-PapersOnline) (2014) [E1]

© IFAC. We evaluate two novel reciprocal self-sensing methods for tapping-mode atomic force microscopy (TM-AFM) utilizing charge measurement and charge actuation, respectively. A... [more]

© IFAC. We evaluate two novel reciprocal self-sensing methods for tapping-mode atomic force microscopy (TM-AFM) utilizing charge measurement and charge actuation, respectively. A microcantilever, which can be batch fabricated through a standard microelectromechanical system (MEMS) process, is coated with a single piezoelectric layer and simultaneously used for actuation and deflection sensing. The setup enables the elimination of the optical beam deflection technique which is commonly used to measure the cantilever oscillation amplitude. The voltage to charge and charge to voltage transfer functions reveal a high amount of capacitive feedthrough which degrades the dynamic range of the sensors significantly. A feedforward control technique is employed to cancel the feedthrough and increase the dynamic range from less than 1dB to approximately 30 dB. Experiments show that the conditioned self-sensing schemes achieve an excellent signal-to-noise ratio and can therefore be used to provide the feedback signal for TM-AFM imaging.

Citations Scopus - 7Web of Science - 1
Co-authors Reza Moheimani
2013 Ruppert MG, Fairbairn MW, Moheimani SOR, 'Multi-Mode Resonant Control of a Microcantilever for Atomic Force Microscopy', 2013 IEEE/ASME International Conference On Advanced Intelligent Mechatronics (AIM): Mechatronics For Human Wellbeing (2013) [E1]
Citations Scopus - 11Web of Science - 6
Co-authors Reza Moheimani
Show 6 more conferences
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Grants and Funding

Summary

Number of grants 5
Total funding $107,106

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


Highlighted grants and funding

2017 UON Researcher Equipment Grant$43,388

The equipment is an automated XYZ scanner to improve the imaging capabilities and productivity of a confocal Raman microscope. This upgrade will enable the 2D and 3D mapping of tissue, polymeric devices, cells, catalysts, and microelectronic devices.

Funding body: The University of Newcastle

Funding body The University of Newcastle
Project Team

Andrew Fleming, John Holdsworth, Pradeep Tanwar, Michael Ruppert, Yuen Yong

Scheme UON 2017 Researcher Equipment Grant
Role Investigator
Funding Start 2017
Funding Finish 2017
GNo
Type Of Funding Internal
Category INTE
UON N

2017 Strategic Pilot Grant$22,133

Simultaneous Surface and Material Imaging with Tapping-mode Tip-enhanced Raman Spectroscopy

This project represents a new research collaboration between engineering, medicine, and physics.The new imaging modality will be employed to map the chemical composition of cancer cells, with a view to differentiating cell types based on the internal concentration of metabolites.

Funding body: Faculty of Engineering and Built Environment - The University of Newcastle (Australia)

Funding body Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Project Team

Michael Ruppert, Andrew Fleming, Yuen Yong, John Holdsworth, Pradeep Tanwar

Scheme FEBE Strategic Pilot Grant
Role Lead
Funding Start 2017
Funding Finish 2017
GNo
Type Of Funding Internal
Category INTE
UON N

20173 grants / $67,521

2017 UON Researcher Equipment Grant$43,388

The equipment is an automated XYZ scanner to improve the imaging capabilities and productivity of a confocal Raman microscope. This upgrade will enable the 2D and 3D mapping of tissue, polymeric devices, cells, catalysts, and microelectronic devices.

Funding body: The University of Newcastle

Funding body The University of Newcastle
Project Team

Andrew Fleming, John Holdsworth, Pradeep Tanwar, Michael Ruppert, Yuen Yong

Scheme UON 2017 Researcher Equipment Grant
Role Investigator
Funding Start 2017
Funding Finish 2017
GNo
Type Of Funding Internal
Category INTE
UON N

2017 Strategic Pilot Grant$22,133

Simultaneous Surface and Material Imaging with Tapping-mode Tip-enhanced Raman Spectroscopy

This project represents a new research collaboration between engineering, medicine, and physics.The new imaging modality will be employed to map the chemical composition of cancer cells, with a view to differentiating cell types based on the internal concentration of metabolites.

Funding body: Faculty of Engineering and Built Environment - The University of Newcastle (Australia)

Funding body Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Project Team

Michael Ruppert, Andrew Fleming, Yuen Yong, John Holdsworth, Pradeep Tanwar

Scheme FEBE Strategic Pilot Grant
Role Lead
Funding Start 2017
Funding Finish 2017
GNo
Type Of Funding Internal
Category INTE
UON N

Conference Travel Grant$2,000

Funding body: Faculty of Engineering and Built Environment - The University of Newcastle (Australia)

Funding body Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Project Team

Michael Ruppert

Scheme Faculty Conference Travel Grant
Role Lead
Funding Start 2017
Funding Finish 2017
GNo
Type Of Funding Internal
Category INTE
UON N

20151 grants / $2,000

Conference Travel Grant$2,000

Funding body: Zurich Instruments AG

Funding body Zurich Instruments AG
Project Team

Michael Ruppert

Scheme Travel Grant
Role Lead
Funding Start 2015
Funding Finish 2015
GNo
Type Of Funding External
Category EXTE
UON N

20141 grants / $37,585

Cantilever mass sensing application in a microfluidic device$37,585

Funding body: CSIRO - Commonwealth Scientific and Industrial Research Organisation

Funding body CSIRO - Commonwealth Scientific and Industrial Research Organisation
Project Team

Prof. Reza Moheimani, Mr. Michael Ruppert

Scheme Postgraduate Scholarship
Role Investigator
Funding Start 2014
Funding Finish 2016
GNo
Type Of Funding Other Public Sector - Commonwealth
Category 2OPC
UON N
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Research Supervision

Number of supervisions

Completed2
Current1

Total current UON EFTSL

PhD0.25

Current Supervision

Commenced Level of Study Research Title Program Supervisor Type
2016 PhD MEMs Devices, AFM and Nano Control PhD (Electrical Engineering), Faculty of Engineering and Built Environment, The University of Newcastle Co-Supervisor

Past Supervision

Year Level of Study Research Title Program Supervisor Type
2015 Honours High-speed Estimation in Multifrequency Atomic Force Microscopy
Final Year Project for the degree of Bachelor of Engineering in Electrical Engineering (Honours) at The University of Newcastle.
Electrical Engineering, Faculty of Engineering and Built Environment - The University of Newcastle (Australia) Principal Supervisor
2014 Honours State Estimation using A Kalman Filter in Tapping-Mode Atomic Force Microscopy
Final Year Project for the degree of Bachelor of Mechatronics Engineering at the University of Newcastle.
Electrical Engineering, Faculty of Engineering and Built Environment - The University of Newcastle (Australia) Co-Supervisor
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Research Projects

Novel Microcantilevers for Multifrequency Atomic Force Microscopy 2016 -

This project aim to develop Novel Microcantilevers for Multifrequency Atomic Force Microscopy. This research will enable high-speed simultaneous imaging of multiple physical and chemical properties at the molecular and atomic scale. 

Grants

Novel Microcantilevers for Multifrequency Atomic Force Microscopy

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Doctor Yuen Yong
Scheme Discovery Projects

Students

Program Research Title
PhD
Faculty of Engineering and Built Environment
MEMs Devices, AFM and Nano Control

Collaborators

Name Organisation
Mr Steven Ian Moore University of Newcastle
Doctor Michael Gunter Ruppert University of Newcastle

Demodulation Techniques for High-Speed and Multifrequency Atomic Force Microscopy 2015 - 2017

The demodulator is a crucial bandwidth-limiting component in the z-axis feedback loop of an atomic force microscope. Specifically for
modern multi-frequency techniques, where higher harmonic and/or higher eigenmode contributions are present in the oscillation signal, the fidelity of the estimates obtained from some traditional demodulation techniques is not guaranteed. This project proposes novel demodulation schemes with high measurement bandwidth, multi-frequency capability and low measurement noise which are rigorously compared against traditional techniques.

Publications

Karvinen KS, Ruppert MG, Mahata K, Moheimani SOR, 'Direct tip-sample force estimation for high-speed dynamic mode atomic force microscopy', IEEE Transactions on Nanotechnology, 13 1257-1265 (2014) [C1]

Ruppert MG, Karvinen KS, Wiggins SL, Moheimani SOR, 'A Kalman Filter for Amplitude Estimation in High-Speed Dynamic Mode Atomic Force Microscopy', IEEE Transactions on Control Systems Technology, 24 276-284 (2016) [C1]

Ruppert MG, Harcombe DM, Moheimani SOR, 'High-Bandwidth Demodulation in MF-AFM: A Kalman Filtering Approach', IEEE-ASME TRANSACTIONS ON MECHATRONICS, 21 2705-2715 (2016) [C1]

Ruppert MG, Harcombe DM, Reza Moheimani SO, 'State estimation for high-speed multifrequency atomic force microscopy', Proceedings of the 2016 American Control Conference (2016) [E1]

Students

Program Research Title
PhD
Faculty of Engineering and Built Environment
MEMs Devices, AFM and Nano Control

Collaborators

Name Organisation
Michael Remo Palmén Ragazzon Norwegian University of Science And Technology

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Research Collaborations

The map is a representation of a researchers co-authorship with collaborators across the globe. The map displays the number of publications against a country, where there is at least one co-author based in that country. Data is sourced from the University of Newcastle research publication management system (NURO) and may not fully represent the authors complete body of work.

Country Count of Publications
Australia 19
United States 10
Norway 3
Switzerland 1
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Dr Michael Ruppert

Positions

Research Associate
Precision Mechatronics Lab
School of Electrical Engineering and Computing
Faculty of Engineering and Built Environment

Casual Academic
Precision Mechatronics Lab
School of Electrical Engineering and Computing
Faculty of Engineering and Built Environment

Contact Details

Email michael.ruppert@newcastle.edu.au
Phone (02) 4921 7345
Links Research Networks
Research Networks

Office

Room ES136
Building Engineering
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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