Photocontrolled self-assembly of silica nanoparticles at two scales

Journal of Colloid and Interface Science
Chang PengRuoxi Wu

Abstract

The photocontrolled self-assembly of coumarin-functionalized silica nanoparticles is fabricated and investigated. When these nanoparticles are uniformly dispersed in CHCl3 solution under 365 nm light illumination, four novel kinds of patterns are self-assembled on the bottom of glass beakers: circle patterns, square plate patterns, semi-annular and annular patterns, swirling patterns, which can be seen with the naked eye. Furthermore, these four patterns exhibit similar nanoscale morphologies: ring-like necklaces in nanoscale dimensions, and reveal interesting superhydrophobic property. In short, there exist two kinds of self-assembly of functionalized silica nanoparticles in two radically different dimensions, which can be potentially applied in self-cleaning fields and the construction of photocontrolled nanoscale structures and macroscale structures.

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Citations

Nov 12, 2019·Advanced Materials·Tong BianRafal Klajn
Sep 15, 2021·Angewandte Chemie·Cornelia von BaeckmannFreddy Kleitz

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