Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
Small. 2016 Jan 6;12(1):51-75. doi: 10.1002/smll.201501367. Epub 2015 Oct 30.
Layered metal nanoparticle (NP) assemblies provide highly porous and conductive composites of unique electrical and optical (plasmonic) properties. Two methods to construct layered metal NP matrices are described, and these include the layer-by-layer deposition of NPs, or the electropolymerization of monolayer-functionalized NPs, specifically thioaniline-modified metal NPs. The layered NP composites are used as sensing matrices through the use of electrochemistry or surface plasmon resonance (SPR) as transduction signals. The crosslinking of the metal NP composites with molecular receptors, or the imprinting of molecular recognition sites into the electropolymerized NP matrices lead to selective and chiroselective sensing interfaces. Furthermore, the electrosynthesis of redox-active, imprinted, bis-aniline bridged Au NP composites yields electrochemically triggered "sponges" for the switchable uptake and release of electron-acceptor substrates, and results in conductive surfaces of electrochemically controlled wettability. Also, photosensitizer-relay-crosslinked Au NP composites, or electrochemically polymerized layered semiconductor quantum dot/metal NP matrices on electrodes, are demonstrated as functional nanostructures for photoelectrochemical applications.
分层金属纳米粒子 (NP) 组装体提供了具有独特电和光 (等离子体) 特性的高多孔和导电复合材料。描述了两种构建分层金属 NP 基质的方法，包括 NP 的逐层沉积，或单层官能化 NP 的电聚合，特别是硫代苯胺修饰的金属 NP。分层 NP 复合材料用作传感基质，通过电化学或表面等离子体共振 (SPR) 作为转导信号。通过将金属 NP 复合材料与分子受体交联，或在电聚合的 NP 基质中印迹分子识别位点，可以得到选择性和手性选择性的传感界面。此外，氧化还原活性、印迹、双苯胺桥接 Au NP 复合材料的电化学合成产生了可电化学触发的“海绵”，用于电子受体底物的可切换吸收和释放，并且导致电化学控制润湿性的导电表面。同样，将光致敏剂中继交联的 Au NP 复合材料或在电极上电聚合的分层半导体量子点/金属 NP 基质，作为光电化学应用的功能纳米结构得到了证明。
