Analysis of charge transport in arrays of 28 kDa nanocrystal gold molecules
Analysis of charge transport in arrays of 28 kDa nanocrystal gold molecules
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28 kDa 纳米晶体金分子阵列中的电荷传输分析
DOI：
10.1039/b508404k
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发表时间：
2005
影响因子：
--
通讯作者：
G. Redmond
中科院分区：
文献类型：
--
作者：
A. Quinn;M. Biancardo;L. Floyd;M. Belloni;P. Ashton;J. Preece;C. Bignozzi;G. Redmond
28 kDa的金分子的阵列表现为弱耦合的分子固体，其包括由绝缘配体屏障分离的离散纳米级金属岛。发现控制电荷输运的关键参数是：（a）单电子重电荷能，由核直径、钝化配体的介电性质和相邻核之间的经典静电耦合控制;（B）由分隔核的配体双层的绝缘性质引起的层间隧道势垒电阻;以及（c）载流路径网络的维数。
Arrays of 28 kDa nanocrystal gold molecules behave as weakly-coupled molecular solids comprising discrete nanoscale metallic islands separated by insulating ligand barriers. The key parameters which are found to dominate charge transport are (a) the single-electron nanocrystal charging energy, governed by the core diameter, the dielectric properties of the passivating ligands and classical electrostatic coupling between neighbouring cores; (b) the inter-nanocrystal tunnel barrier resistance that arises from the insulating nature of the ligand bilayers that separate the cores; and (c) the dimensionality of the network of current-carrying paths.