Reversible aggregation of plasmonic nanoparticles is an exciting tool for the implantation of the colorimetric signal transduction under an external stimulus. The real challenge is the experimental control over discrete particles aggregation without the risk of bulk precipitation. Here, we present a strategy for reversible aggregation of nanoparticles in confined space through hydrophobic interactions. Polystyrene-stabilized gold nanoparticles are encapsulated within a hollow capsule of mesoporous silica. Experimentally controlled diffusion of a solvent (THF or water) through the radial pores in silica capsules allows for reversible particles aggregation in confined spaces.

Solvent-induced reversible self-organization of plasmonic nanoparticles in confined spaces

255th National Meeting (2018)

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