Fast atom bombardment (FAB) of asymmetric polyvinyltrimethylsilane (PVTMS) membranes by 1 keV Ar, or 1 keV He, or 0.8 keV H beams, with fluences of about 1015 particles cm-2, resulted in a decrease in the transmembrane flux of various test gases (He, H2, O2, N2, CH4) and in a significant increase in the component selectivity. The pristine and the FAB-treated samples were studied by XPS and SIMS. According to XPS results, the FAB-treatment of the membranes led to an enrichment of carbon, while SIMS showed a simultaneous decrease in the hydrogen content in the surface layer, modified primarily on a nanometric scale.
|Number of pages||3|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - Feb 1997|
ASJC Scopus subject areas
- Nuclear and High Energy Physics