Method of producing porous silicon particles by stain-etching and silicon nanoparticles from stain-etched silicon powder
First Claim
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1. A method for making porous silicon powder comprising the steps of:
- a) providing a quantity of silicon powder comprising a plurality of silicon particles; and
b) etching said silicon, particles using a stain-etch process to form porous silicon particles wherein only the outermost layers of said particles are porous, and wherein the outermost porous layers of said silicon particles comprise a thickness which ranges from at least about 1 angstrom to at most about 500 nanometers.
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Abstract
The present invention is for a porous silicon powder comprising silicon particles wherein the outermost layers of said particles are porous. The present invention is also directed to a method of making this porous silicon powder using a stain etch method. The present invention is also directed to a method of making silicon nanoparticles from the porous silicon powders using a process of ultrasonic agitation. The present invention also includes methods of processing these silicon nanoparticles for use in a variety of applications.
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18 Claims
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1. A method for making porous silicon powder comprising the steps of:
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a) providing a quantity of silicon powder comprising a plurality of silicon particles; and b) etching said silicon, particles using a stain-etch process to form porous silicon particles wherein only the outermost layers of said particles are porous, and wherein the outermost porous layers of said silicon particles comprise a thickness which ranges from at least about 1 angstrom to at most about 500 nanometers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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