Microstructure and crystal structure of nanocrystalline powders and films of PbS

Abstract

The microstructure and crystal structure of nanocrystalline powders and nanostructured films of lead sulfide PbS have been investigated using X-ray diffraction and electron microscopy. It has been found that, in the synthesized nanopowders, the average size of PbS nanoparticles ranges from 20 to 8 nm, whereas the average size of PbS nanoparticles in nanofilms varies from 80 to 40 nm. It has been shown that the nanocrystalline PbS powders have a cubic (space group Fm 3m) structure of the B1 type. The nanostructured PbS films prepared by chemical precipitation on a glass substrate have a cubic (space group Fm 3m) structure of the D0 3 type with the S atoms located in positions of two types: 4(b) and 8(c). © 2012 Pleiades Publishing, Ltd.