Self-assembly of ordered, robust, three-dimensional gold nanocrystal/silica arrays
Self-assembly of ordered, robust, three-dimensional gold nanocrystal/silica arrays
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DOI：
10.1126/science.1095140
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发表时间：
2004-04-23
期刊：
影响因子：
56.9
通讯作者：
Brinker, CJ
中科院分区：
文献类型：
--
作者：
Fan, HY;Yang, K;Brinker, CJ
我们报道了一种新的水溶性纳米胶束（NC）的合成通过自组装可溶性二氧化硅。该中间相包含以面心立方晶格排列在二氧化硅基质内的金纳米晶体，其晶胞尺寸可通过控制伯烷醇稳定配体或周围的次级表面活性剂的碳纳米管直径和/或烷烃链长度来调节。在动力学控制的二氧化硅聚合条件下，蒸发驱动NC胶束在旋涂过程中自组装成有序的NC/二氧化硅薄膜中间相。中间体NC胶束是水溶性的，并且是生物标记感兴趣的。在用有序的三维金纳米管/二氧化硅阵列作为“绝缘体”制造的金属-绝缘体-金属电容器上的初始实验证明了低于100开尔文的集体库仑阻塞行为，并建立了库仑岛的明确三维阵列的电流-电压缩放关系。
We report the synthesis of a new nanocrystal (NC) mesophase through self-assembly of water-soluble NC micelles with soluble silica. The mesophase comprises gold nanocrystals arranged within a silica matrix in a face-centered cubic lattice with cell dimensions that are adjustable through control of the nanocrystal diameter and/or the alkane chain lengths of the primary alkanethiol stabilizing ligands or the surrounding secondary surfactants. Under kinetically controlled silica polymerization conditions, evaporation drives self-assembly of NC micelles into ordered NC/silica thin-film mesophases during spin coating. The intermediate NC micelles are water soluble and of interest for biolabeling. Initial experiments on a metal-insulator-metal capacitor fabricated with an ordered three-dimensional gold nanocrystal/silica array as the "insulator" demonstrated collective Coulomb blockade behavior below 100 kelvin and established the current-voltage scaling relationship for a well-defined three-dimensional array of Coulomb islands.