Graphene Membranes for Atmospheric Pressure Photoelectron Spectroscopy

Atmospheric pressure X-ray photoelectron spectroscopy apparatus: Bridging the pressure gap.

One of the main goals in catalysis is the characterization of solid/gas interfaces in a reaction environment. The electronic structure and chemical composition of surfaces become heavily influenced by the surrounding environment. However, the lack of surface sensitive techniques that are able to monitor these modifications under high pressure conditions hinders the understanding of such process...

Probing voltage drop variations in graphene with photoelectron spectroscopy.

We use X-ray photoelectron spectroscopy (XPS) for characterization of voltage drop variations of large area single-layer graphene on quartz substrates, by application of a voltage bias across two gold electrodes deposited on top. By monitoring the spatial variation of the kinetic energies of emitted C1s photoelectrons, we extract voltage variations in the graphene layer in a chemically specific...

High-pressure Raman spectroscopy of graphene

John E. Proctor,1,* Eugene Gregoryanz,1 Konstantin S. Novoselov,2 Mustafa Lotya,3 Jonathan N. Coleman,3 and Matthew P. Halsall4 1School of Physics and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom 2School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom 3School of Physics, Trinity College D...

X-ray photoelectron spectroscopy for identification of morphological defects and disorders in graphene devices

High-resolution photoelectron spectroscopy

The evolution of photoelectron spectroscopy of neutral molecules in the gas phase from its first applications in the early 1960s to the present day is reviewed with emphasis on the description of methods that have contributed to improve the resolution. In early days, photoelectron spectroscopy was very successfully used to study the electronic structure of molecules. As the resolution improved,...