X-ray photoelectron spectroscopy (XPS) is a surface sensitive technique widely used for analysis of elemental compositions and oxidation states. The XPS facility at the University of South Carolina is a Kratos Axis Ultra DLD instrument equipped with a monochromated Al K
a x-ray source and hemispherical analyzer capable of an energy resolution of 0.5 eV. A sophisticated charge neutralization system enables XPS experiments to be carried out on insulating materials, such as oxide powders and polymers. The minimum detection spot size on the surface is 15 mm in diameter, and therefore surface chemical compositions can be determined with high spatial resolution. A catalysis cell directly attached to the XPS chamber allows the sample to be treated at high pressures up to several atmospheres with gases such as O
2 and H
2 and high temperature (<1000 °C); samples can be transferred from the catalysis cell to the XPS chamber without exposure to air.
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| XPS of 2% Rh supported on silica powder, before and after a treatment in catalysis cell with H2 at 420 K |
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We welcome samples both from academic and industrial users. Please see
Price List for fees and charges.
Requirements:
- Please click here to download PDF form of the user information sheet, complete it and e-mail the completed form to Dr. Shuguo Ma at mas@engr.sc.edu. (You may call Dr. Ma at 803.777.3949 with questions or for more information.)
- If your sample is in a powdered form, there must be enough material to cover an area of 100 mm2
- For special cases, please check with the XPS lab on how to prepare samples
- For new samples and first time users, in order for us to better serve you, please schedule a discussion with the lab director.
