Observation of molybdenite surface using scanning Auger microscope

A preliminary experiment was performed on diffusion of gas particles in the bulk to the surface using the electron stimulated desorption ESD.method. In molybdenite diffusion of hydrogen from the bulk to the surface was observed by desorbed ion images in the scanning electron microscope. Diffusion to the surface was observed on two types of surface, those with high step density and those with lower density, at about 300 and 4008C of the sample temperatures. The diffusion energy from the bulk to the surface can be larger than the thermal desorption energy at the surface. q1999 Elsevier Science B.V. All rights reserved