System and method for controlling the size and/or distribution of catalyst nanoparticles for nanostructure growth
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United States of America Patent
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Issued Date -
Feb 7, 2008
app pub date -
Sep 16, 2005
filing date -
Nov 23, 2004
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Abandoned
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Abstract
Techniques for controlling the size and/or distribution of a catalyst nanoparticles on a substrate are provided. The catalyst nanoparticles comprise any species that can be used for growing a nanostructure, such as a nanotube, on the substrate surface. Polymers are used as a carrier of a catalyst payload, and such polymers self-assemble on a substrate thereby controlling the size and/or distribution of resulting catalyst nanoparticles. Amphiphilic block copolymers are known self-assembly systems, in which chemically-distinct blocks microphase-separate into a nanoscale morphology, such as cylindrical or spherical, depending on the polymer chemistry and molecular weight. Such block copolymers are used as a carrier of a catalyst payload, and their self-assembly into a nanoscale morphology controls size and/or distribution of resulting catalyst nanoparticles onto a substrate.
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