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Updated: Sep 23, 2025
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
Published on: March 27, 2019
A six-fold difference in structure results in a six-order difference in conductivity: silica shell nanoarchitectonics
Takaaki Yoshida1, Makoto Ogawa2
1Graduate School of Creative Science and Engineering, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan.
Abstract:
Carbon black (Ketchen Black with a particle size of several tens of nm) was coated with silica with a varied thickness of 2 and 12 nm. Carbon/silica core-shell particles were grafted with the γ-methacryloxypropylsilyl group to be homogeneously dispersed into a poly(methyl methacrylate) film. The electrical conductivity of the poly(methyl methacrylate) films containing carbon/silica particles was successfully controlled by the thickness of the silica layer; silica coating with 2 nm thickness gave a conducting film, while that with 12 nm thickness gave a less conducting film with a remarkable difference on the order of 106 (in volume conductivity).
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