Abstract
Stimuli-triggered wettability of surfaces and controlled uptake and release of substrates by "smart" materials are essential for drug delivery and microfluidic control. A composite "sponge" consisting of bis-aniline-bridged Au nanoparticles (NPs), functionalized with photoisomerizable nitrospiropyran/nitromerocyanine that includes selective imprinted molecular recognition sites for N,N′-bis(3-sulfonatopropyl)-4, 4′-bipyridinium (PVS) was electropolymerized on a Au electrode. The system is triggered by photonic and/or electrical signals to yield four different states exhibiting variable binding/release capacities for PVS and controlled wettability of the surface. The electrical/optical uptake and release of PVS to and from the Au NPs "sponge", respectively, is followed by CdSe/ZnS quantum dots, acting as an auxiliary photonic label.
Original language | English |
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Pages (from-to) | 6533-6536 |
Number of pages | 4 |
Journal | Journal of the American Chemical Society |
Volume | 133 |
Issue number | 17 |
DOIs | |
State | Published - 4 May 2011 |