Controlled synthesis of 2-D and 3-D dendritic platinum nanostructures
Controlled synthesis of 2-D and 3-D dendritic platinum nanostructures
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DOI：
10.1021/ja037474t
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发表时间：
2004-01-21
影响因子：
15
通讯作者：
Shelnutt, JA
中科院分区：
文献类型：
--
作者：
Song, YJ;Yang, Y;Shelnutt, JA
使用抗坏血酸作为还原剂在表面活性剂水溶液中接种和自催化还原铂盐可产生显着的树枝状金属纳米结构。在胶束表面活性剂溶液中，获得球形树枝状金属纳米结构，这些纳米枝晶中最小的类似于连接的纳米粒子的集合体，并且纳米枝晶是单晶。以脂质体为模板，可以制备薄圆盘形式的树枝状铂片或固体泡沫状纳米材料。通过使用锡卟啉光催化剂来实现对这些纳米枝晶、纳米片和纳米结构泡沫形态的综合控制，以方便有效地产生大量初始催化生长中心。种子颗粒的浓度决定了这些新型二维和三维铂纳米结构的最终平均尺寸和均匀性。
Seeding and autocatalytic reduction of platinum salts in aqueous surfactant solution using ascorbic acid as the reductant leads to remarkable dendritic metal nanostructures. In micellar surfactant solutions, spherical dendritic metal nanostructures are obtained, and the smallest of these nanodendrites resemble assemblies of joined nanoparticles and the nanodendrites are single crystals. With liposomes as the template, dendritic platinum sheets in the form of thin circular disks or solid foamlike nanomaterials can be made. Synthetic control over the morphology of these nanodendrites, nanosheets, and nanostructured foams is realized by using a tin-porphyrin photocatalyst to conveniently and effectively produce a large initial population of catalytic growth centers. The concentration of seed particles determines the ultimate average size and uniformity of these novel two- and three-dimensional platinum nanostructures.