I have been prepared bovine serum albumin (BSA) capped gold nanoclusters using water as medium and it has luminescent property. If i need XPS for this sample, how will it give for XPS measurement? (i.e drop cast on glass or ITO substrate or any other ways).
Need a suggestions....
Dear Sir,
please avoid the use of insulating substrates (e.g. glass) for drop casting. Otherwise, you will have severe problems with sample charging in XPS, making the interpretation of binding energies (i.e chemical shifts etc.) difficult.
Regards, FM
Make your colloidal sample solution and spotted on an aluminum foil or molybdenum plate and dried in vacuum. Apply the pass energy around 50 eV for survey scans
and 20 eV for a specific region to get a very good high-resolution spectrum.
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