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Porous substrates, articles, systems and compositions comprising nanofibers and methods of their use and production

  • US 10,279,341 B2
  • Filed: 10/03/2014
  • Issued: 05/07/2019
  • Est. Priority Date: 02/02/2004
  • Status: Active Grant
First Claim
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1. A method of producing nanowires, the method comprising:

  • providing a porous substrate comprising a plurality of carbon black particles;

    depositing metal colloid catalyst on at least a portion of the overall surface area of the carbon black particles;

    feeding the carbon black particles having the metal colloid catalyst deposited thereon with a reactive gas comprising silane (SiH4); and

    growing silicon nanowires in situ from the metal colloid catalyst deposited on the carbon black particles using a Vapor-Liquid-Solid (VLS) synthesis process, wherein the grown silicon nanowires are attached to and extend from at least a portion of the overall surface of the carbon black particles and have an aspect ratio greater than 10 and a cross sectional dimension less than 100 nm, and wherein the diameter of the carbon black particles is greater than 20 times and less than 1000 times the average cross-sectional dimension of the silicon nanowires.

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