Template-engaged replacement reaction: A one-step approach to the large-scale synthesis of metal nanostructures with hollow interiors
Template-engaged replacement reaction: A one-step approach to the large-scale synthesis of metal nanostructures with hollow interiors
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DOI：
10.1021/nl025531v
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发表时间：
2002-05-01
期刊：
影响因子：
10.8
通讯作者：
Xia, YN
中科院分区：
文献类型：
--
作者：
Sun, YG;Mayers, BT;Xia, YN
本文描述了一种通用方法，通过使适当的盐溶液与更具反应性的金属的固体模板反应来产生金属的纳米级中空结构。典型的实例包括Au 3+、Pt 2+和Pd 2+盐以及银的纳米颗粒或纳米线。这些中空结构的形态、空隙空间和壁厚都由固体模板决定，固体模板在置换反应期间完全转化为可溶性物质。电子显微镜和衍射研究表明，当模板是单晶时，也可以获得金属的单晶中空结构。这些具有良好控制的尺寸和形状的金属中空结构预计将用于涉及纳米级封装、药物递送、等离子体光子学和量热传感的许多应用中。
This paper describes a general approach that generates nanoscale hollow structures of metals by reacting solutions of appropriate salt solutions with solid templates of a more reactive metal. Typical examples include Au3+, Pt2+, and Pd2+ salts and nanoparticles or nanowires of silver. The morphology, void space, and wall thickness of these hollow structures are all determined by the solid templates, which are completely converted into soluble species during the replacement reaction. Both electron microscopy and diffraction studies indicate that single crystalline hollow structures of metals can also be obtained when the templates are single crystals. These metallic hollow structures, having well-controlled sizes and shapes, are expected to find use in a number of applications that involve nanoscale encapsulation, drug delivery, plasmon photonics, and calorimetric sensing.