Photochemically and Electrochemically Triggered Au Nanoparticles "Sponges"
Photochemically and Electrochemically Triggered Au Nanoparticles "Sponges"
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DOI：
10.1021/ja2009899
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发表时间：
2011-05-04
影响因子：
15
通讯作者：
Willner, Itamar
中科院分区：
文献类型：
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作者：
Balogh, Dora;Tel-Vered, Ran;Willner, Itamar
刺激触发的表面润湿性和受控的“智能”材料的基板的摄取和释放是必不可少的药物输送和微流体控制。在Au电极上电聚合由双苯胺桥接的All纳米颗粒（NP）组成的复合“海绵”，所述复合“海绵”用包括N，N '-双（3-磺酸基丙基）-4，4'-联吡啶鎓（PVS）的选择性印迹分子识别位点的可光异构化硝基螺吡喃/硝基亚甲基脲官能化。该系统由光子和/或电信号触发，以产生四种不同的状态，表现出可变的PVS结合/释放能力和受控的表面润湿性。PVS分别从Au NPs“海绵”吸收和释放到电/光吸收之后是充当辅助光子标记的CdSe/ZnS量子点。
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 All nanoparticles (NPs), functionalized with photo-isomerizable 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.