Properties of arsenic sulphide (beta-As4S4) modified by mechanical activation

Abstract

Arsenic sulphide beta-As4S4 has been modified by mechanical activation in a planetary ball mill. As a consequence, the solid-state properties and dissolution yield have been influenced. The following changes were observed: the increase of specific surface area, changes in the morphology (the formation of submicron particles), the occurrence of nanoparticles (21-31 nm), changes in crystal lattice parameters and changes in the Raman shift of particular vibrations. As a consequence of these changes, the dissolution rate of beta-As4S4 has been increased, which is a challenge for the application in cancer research.