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Dr Chi Pang

Senior Research Associate & Laboratory Manager

Summary
 

Having held two Japan Society for the Promotion of Science (JSPS) Fellowships at Kobe University and the Kanagawa Academy of Science and Technology and been a visiting scientist at Hokkaido University. Chi has also had research appointments at University College London and the Universities of Manchester, Liverpool, and Reading. Chi's research focuses mainly on nanoscience and surface science of metal oxides. In particular, investigating these materials using scanning probe microscopy and X-ray imaging techniques. Chi's main role at UCL includes:

  1. Providing technical and academic support to Prof. Geoff Thornton's group.
  2. Training users of the Chemistry Department’s X-ray photolelectron spectrometer.
  3. Teaching.
Summary of research group
  The Thornton group focuses on research on the nanoscience and surface science of metal oxides, which play a crucial role in technologies such as catalysis and molecular electronics. The targets of our experiments include developing single molecule spectroscopy on oxide surfaces, imaging single molecule chemistry, and nanofabrication of materials. This work employs a suite of scanning probe microscopes based in London together with synchrotron radiation techniques such as X-ray imaging which is performed at Diamond Light Source (Oxfordshire) and Elettra (Trieste).
Research highlights
 
  1. A new reaction mechanism was discovered for the desorption of H from TiO2. An electric field is applied by an STM tip and this reduces the width of the reaction barrier, allowing H atoms to tunnel away from the surface. "Tunneling desorption of single hydrogen on the surface of titanium dioxide"
  2. Using low temperature STM, we showed that the reactivity of CO on curved Pd nanoparticles differs from flat Pd surfaces. The curving of the Pd nanoparticles is induced by its growth over steps on the underlying TiO2 substrate. “Influence of support morphology on the bonding of molecules to nanoparticles
  3. By forming oxygen vacancies on TiO2 by electron irradiation, we directly correlated the concentration of vacancies with an electronic state by combining STM and UV photoelectron spectroscopy measurements. “Oxygen vacancy origin of the surface band-gap state of TiO2(110)"
  4. The dissociation of individual water and oxygen molecules at oxygen vacancies on TiO2 was directly visualized using STM. “Direct visualization of defect-mediated dissociation of water on TiO2(110)
Research Facilities
 
  • Scanning tunneling microscopy (STM)
  • Atomic force microscopy (AFM)
  • X-ray photoelecton spectroscopy (XPS)
  • UV photoelecton spectroscopy (UPS)
  • X-ray photoemission electron microscopy (XPEEM)
Awards
   
Memberships
   
Research interests
 
  • Nanoscience
  • Surface Science
  • Oxide Materials
  • Molecular Self-Assembly
  • Chirality at Surfaces 
  • Heterogeneous Catalysis
  • Photocatalysis
  • Energy Materials
Teaching
 

  • CHEM3001 Module 6
  • CHEMM901 (Supervisor)