Dr Richard F Webster


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Research Associate
Electron Microscope Unit, UNSW
Conjoint Associate Lecturer
School of Materials Science and Engineering, UNSW

S: G35, F10 Chemical Science Annex
     Mark Wainwright Analytical Centre
     UNSW, Sydney
     2052, NSW, Australia
P: (02) 9065 2644
E: r.webster@unsw.edu.au

Research

Richard specializes in electron microscopy at the Mark Wainwright Analytical Centre's Electron Microscope Unit. He holds a PhD in Physics from the University of Bristol, where his research focused on Indium Gallium Nitride nanorods and the potential applications in solar cells and LEDs.
Richard's research revolves around developing innovative techniques to understand the relationship between nano/microstructure and material properties, particularly at interfaces and for defects in semiconductors. Key areas of interest include:

  • Precise Measurement of $\zeta$-Factors: This involves using X-ray Energy Dispersive Spectroscopy (XEDS) to accurately measure these factors for more reliable quantification. This work includes determining the exact probe current to enhance the sensitivity Scanning Transmission Electron Microscopy (STEM) techniques, particularly XEDS, Electron Energy Loss Spectroscopy (EELS), and High-Angle Annular Dark-Field (HAADF).
  • Automating Alignment Procedures: Exploring the use of Bayesian Optimization techniques to automate the alignment process for scanning transmission electron microscopes.
  • Determining Mg:ZnO Nanocrystallite Polarization: Employing Aberration-Corrected STEM techniques like Annular Bright-Field (ABF) and HAADF to investigate the polarization of Mg:ZnO nanocrystallites. Such materials have been shown to exhibit reversible polarization under an applied electric field, making them promising candidates for memory storage applications.
  • EELS and High-Resolution TEM of Novel Aluminum Alloys: Utilising high-resolution Transmission Electron Microscopy, XEDS and EELS to study novel aluminum alloys containing precipitates of Cobalt (Co), Cerium (Ce), or Scandium (Sc). These alloys are created using additive manufacturing techniques and aim to achieve improved strength characteristics where the understanding of precipitate formation and composition can be vital.


Experience

Research Associate
Electron Microscope Unit
University of New South Wales  (2017 - present)
Working in the EMU to collaborate with researchers across the University and to develop quantitative techniques.

Research Associate
School of Physics, Micro- & Nano- Structures Group and CDTR
University of Bristol  (2016 - 2017)
Investigating the nucleation and growth of GaN HEMTs on polycrystalline diamond for improved heat transportation and device reliability.


Education

PhD, Physics
University of Bristol  (2011 - 2015)
Thesis: Transmission Electron Microscopy of Indium Gallium Nitride Nanorods

MSci, Physics
University of Bristol  (2007 - 2011)
Master's Thesis: Characterisation of the FORTRIS Monolithic Active Pixel Sesnor (MAPS) for use at CERN


Publications


Teaching

Professional Affiliations