XPS studies of the surface of nanocrystalline tungsten disulfide

Nanocrystalline 2H-WS2 powders with d[013] = 3.8(3) nm, 7.1(4) nm and 57(4) nm were synthesized by chemical deposition from gas phase. The changes of phase contents of the surface of nanocrystalline 2H-WS2 powders were explored by XPS method at different temperatures of anneal in vacuum. In this work the deconvolution of XPS-spectra with the requirement of mutual correlation between integral intensities variations of corresponding components of W4f- and S2p-lines was realized. The fact of existence of several non-equivalent phases was revealed.