Advanced spectroscopy and imaging

  • Scanning tunnelling microscopy
  • Atomic force microscopy
  • Raman spectroscopy and imaging
  • Photoluminescence spectroscopy
  • Raman spectroscopy and imaging
  • Deep-level transient-spectroscopy equipment

Imaging and spectroscopy are key research tools in the search for novel functional materials. The scanning probe systems in the group operate at UHV pressure to ensure that atomic scale imaging is feasible, allowing us to determine the atomic landscape of surfaces and to understand the key features of nano structured solids. Raman spectroscopy and imaging provides information on chemical structure, one atomic vibrational properties and on strain distributions in solids. These tools have found recent application in graphene research helping to prove the existence of graphane and to confirm the intrinsic rippling of unsupported graphene.

Scanning tunnelling microscopy of suspended graphene (Nanoscale, 2012, 4, 3065) (DOI: 10.1039/c2nr30162h)

Recep Zan,*ab Chris Muryn,c Ursel Bangert,b Philip Mattocks,d Paul Wincott,e David Vaughan,e Xuesong Li,fg

Luigi Colombo,h Rodney S. Ruoff,f Bruce Hamilton and Konstantin S. Novoselova 

Photoluminescence and Deep Level Transient Spectroscopy are principally used to understand the defect structure of solar energy conversion materials allowing us to spectroscopically determine the energies and electron exchange processes occurring at such defects in active solar cells. Such defect play a mjor part in limiting ther efficiencies of solar cells and so understanding and removing them is essential.

▲ Up to the top