Patent ID: 7888271

Claim:
A method for making silicon nano-structure, the method comprising the following steps of: (a) providing a growing substrate and a growing device, the growing device comprising a heating apparatus and a reacting room; (b) placing the growing substrate and a quantity of a catalyst, that is separate from the growing substrate, into the reacting room, wherein the catalyst is pure aluminum; (c) introducing a silicon-containing gas and a hydrogen gas into the reacting room; (d) heating the reacting room to a temperature of about 660° C. to about 1100° C., and the silicon-containing gas reacts with the hydrogen gas under a catalysis of the pure aluminum to fabricate silicon nano-structure on the growing substrate; (e) suspending the heating for a period of time to stop fabricating silicon nano-structure; and (f) restarting heating the reacting room to a temperature of about 660° C. to about 1100° C. to fabricate branched silicon nano-structure on a surface of the silicon nano-structure.