About Me


me

My interests lie in the application of electron microscopy methods to determine composition, structure and defect nature of semiconductors, mainly III-nitrides. My present research includes the application of electron microscopy to InxGa1-xN nanorods and films for use in LED and transistor devices. More specifically:

  • the compositional profiling, using energy dispersive X-ray spectroscopy, of InxGa1-xN nanorods to understand the growth mechanisms of these structures,
  • the application of electron diffraction techniques to determine the structure of materials, mainly semiconductors and
  • the use of novel substrates, such as polycrystalline diamond, for improved thermal characteristics of semiconductor devices.

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Skills


TEM

SEM

FIB

Diffraction

EDX

HRTEM

Publications


Some Stats


11

Publications

5

h-index

6

Years of Experience

Experience


  • Jan 2017
    -
    Present

    University of New South Wales

    Research Associate

    To operate, manage and train users on the JEOL F200 microscope installed in Jan 2017.
    My research interests lie in studying materials using HR-STEM and tomographic techniques especially on perovskite thin films, nitrides, superlattices, and catalytic nanoparticles. One example of current work is the HR-STEM and EDX spectroscopy of AuRu branched nanoparticles studying the crystallographic relationship between the particle and the branches.

  • Oct 2015
    -
    Dec 2016

    University of Bristol

    Research Assistant

    To study the growth of GaN films grown on polycrystalline diamond to utilise its high thermal conductivity and improve the reliability of HEMT and LED devices. This work mainly used TEM and related techniques. This work included the dislocation analysis of III-N films grown directly on diamond and with a novel epitaxial layer overgrowth method and the effect of AlN thickness on thermal boundary resistance.

Education


  • Oct 2011
    -
    Oct 2015

    University of Bristol

    Ph.D. Physics

    InxGa1-xN nanorods were grown on silicon substrates grown using molecular beam epitaxy (MBE) at Nottingham University for solar cell applications. The focus of my Ph.D. thesis was the characterisation of the structure and composition of these nanorods. This was primarily achieved using electron microscopy techniques including SEM, dark-field TEM, diffraction, STEM EDX & HAADF.


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  • Oct 2007
    -
    Jul 2011

    University of Bristol

    MSci. Physics (2:1)

    Undergraduate degree in Physics, courses included: Condensed Matter Physics, Mathematical Methods, Modern Optics, Nanoscience, Particle Physics, Quantum Mechanics, Soft Condensed Matter Physics. Masters thesis on Monolithic Active Pixel Sensors (MAPS)


    Download Dissertation

  • 2002
    -
    2007

    Prudhoe Community High School

    A-Levels

    A-Levels include 3 As in Physics, Mathematics and Chemistry.

Contact


1/63 Cowper Street,
Randwick, NSW 2031, AUS

email@rfwebster.co.uk

+61 431 534 332

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