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GROWTH AND CONDUCTIVITY OF MONOLAYER PROTECTED CLUSTER FILMS ― NEW STRATEGIES

机译:单层保护团簇膜的生长和导电性-新策略

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摘要

The growth and conductivity of assembled films of monolayer protected cluster molecules (MPC) were investigated. The nanoparticles used are composed of a 1.6 nm diameter gold core with a surrounding mixed monolayer of alkyl thiolate ligands, including non-linking hexane-thiolates and linking carboxylic acid-terminated alkane thiolates. The carboxylate terminated ligands, mercaptoundeconic acid are used to tether MPCs to surfaces and bind MPCs to each other via carboxylate-metal ion-carboxylate bridges. Growth favoured MPCs with the higher loadings of the linker ligand over all other loadings present during the growth process. Films containing an azobenzene linking ligand were constructed and found to be more conductive than their alkyl linker counterparts, suggesting that the primary electron transfer (ET) pathway through azobenzene-linked nanoparticles is through the metal-carboxylate linkages, a potentially useful tool for probing the dependence of ET on the metal junction.
机译:研究了单层保护簇分子(MPC)组装膜的生长和电导率。所使用的纳米颗粒由直径为1.6 nm的金核和周围的烷基硫醇盐配体混合单层组成,其中包括非连接的己烷硫醇盐和连接的羧酸封端的链烷硫醇盐。羧酸酯封端的配体巯基乙二酸用于将MPC束缚在表面上,并通过羧酸盐-金属离子-羧酸盐桥彼此结合。与生长过程中存在的所有其他负载相比,生长更有利于具有更高连接键配体负载的MPC。构造了一个包含偶氮苯连接配体的薄膜,发现其导电性比其烷基连接体的导电性更高,这表明通过偶氮苯连接的纳米粒子的一次电子转移(ET)途径是通过金属羧酸酯键,这是探测该化合物的潜在有用工具。 ET对金属结的依赖性。

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