Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands
Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands
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DOI：
10.1126/science.1170524
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发表时间：
2009-06-12
期刊：
影响因子：
56.9
通讯作者：
Talapin, Dmitri V.
中科院分区：
文献类型：
--
作者：
Kovalenko, Maksym V.;Scheele, Marcus;Talapin, Dmitri V.
类似于原子结合形成分子和晶体结构的方式，胶体纳米晶体可以结合在一起形成更大的组装体。这些结构的性质由单个纳米晶体的性质及其相互作用决定。通常用于双金属合成的有机配体的绝缘性质导致非常差的颗粒间偶联。我们发现，各种分子金属硫族化合物配合物可以作为方便的配体的胶体纳米晶体和纳米线。这些配体可以在温和的热处理后转化为半导体相，产生无机纳米固体。无机配体的效用被证明为模型系统，包括高导电阵列的金纳米晶体覆盖Sn 2S 64-离子和场效应晶体管的硒化镉纳米晶体。
Similar to the way that atoms bond to form molecules and crystalline structures, colloidal nanocrystals can be combined together to form larger assemblies. The properties of these structures are determined by the properties of individual nanocrystals and by their interactions. The insulating nature of organic ligands typically used in nanocrystal synthesis results in very poor interparticle coupling. We found that various molecular metal chalcogenide complexes can serve as convenient ligands for colloidal nanocrystals and nanowires. These ligands can be converted into semiconducting phases upon gentle heat treatment, generating inorganic nanocrystal solids. The utility of the inorganic ligands is demonstrated for model systems, including highly conductive arrays of gold nanocrystals capped with Sn2S64- ions and field-effect transistors on cadmium selenide nanocrystals.