pH‐Responsive Nanoporous Silica Colloidal Membranes |
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| Authors: | Olga Schepelina Nils Poth Ilya Zharov |
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| Affiliation: | Department of Chemistry, University of Utah 315 South 1400 East, Salt Lake City, UT 84112 (USA) |
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| Abstract: | Free‐standing colloidal membranes (nanofrits) with varied thickness and nanopore size are fabricated and modified with pH‐responsive poly(2‐(dimethylamino)ethyl methacrylate) brushes. The polymer‐modified nanofrits demonstrate excellent gating behavior for molecular diffusion: in the presence of acid, the diffusion rate of positively charged species significantly decreases. Increasing the polymer length and membrane thickness and decreasing the nanopore size leads to the complete acid‐controlled gating of the membranes. |
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| Keywords: | colloids membranes nanoporous silica stimuli‐responsive materials surface modifications |
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