Patent ID: 6841142
Filing Date: 2005-01-11
Classification: C01B,C01G,C01P,C30B,G01Q,Y10S

Abstract:
1. A method for bulk synthesis of long nanotubes of a transition metal chalcogenide from a transition metal material, water vapor and H 2 X gas or H 2 gas and X vapor, wherein X is S, Se or Te, comprising: a) either heating a transition metal material in the presence of water vapor in a vacuum apparatus or evaporating a transition metal material in the presence of water vapor by an electron beam, at a suitable pressure, to obtain nanoparticles of the transition metal oxide; b) elongating the transition metal oxide nanoparticles of step (a); and c) annealing the transition metal oxide nanoparticles obtained in step (b) in a reducing atmosphere with a H