We report experimental results on the kinetics of the electron-beam-induced reduction of W03 by in situ high-resolution electron microscopy. Electron-beam irradiation of WO3results in complete reduction to W. The process is surface-initiated through desorption of oxygen from the crystal surface, and the subsequent growth of tungsten was found to be a diffusion-controlled process. The damage rate follows a para-linear curve, that is, an initially parabolic damage rate degenerating into a linear rate. The epitaxial relationship between WO3and W was found to be (001)WO3//(110)w. The WO3lattice has a critical nucleus size of about 2-6 nm.
ASJC Scopus subject areas
- Condensed Matter Physics