Seedless and Templateless Synthesis of Rectangular Palladium Nanoparticles
Seedless and Templateless Synthesis of Rectangular Palladium Nanoparticles
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DOI：
10.1021/cm0623209
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发表时间：
2007-03
影响因子：
8.6
通讯作者：
Yuan Sun;Lihua Zhang;Hongwen Zhou;Yimei Zhu;E. Sutter;Y. Ji;M. Rafailovich;J. Sokolov
中科院分区：
文献类型：
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作者：
Yuan Sun;Lihua Zhang;Hongwen Zhou;Yimei Zhu;E. Sutter;Y. Ji;M. Rafailovich;J. Sokolov
在表面活性剂十六烷基三甲基溴化铵存在下，室温下用抗坏血酸还原K2 PdCl 4，成功地合成了高结晶度的矩形钯纳米粒子，柠檬酸三钠是高产率制备纳米立方体和纳米棒的关键因素。纳米棒的平均长度和纵横比可以通过改变柠檬酸三钠的浓度来调节。这些矩形纳米颗粒作为胶体稳定数月。然而，在暴露于空气中约100天后，TEM网格上的干燥纳米颗粒被氧化以形成覆盖纳米颗粒表面的1.6 - 3.8 nm厚的壳。
Highly crystalline rectangular palladium nanoparticles have been successfully synthesized via the reduction of K2PdCl4 by ascorbic acid in the presence of a surfactant, cetyltrimethylammonium bromide, under room temperature and trisodium citrate is a key factor for high yield of nanocubes and nanorods. The average length and aspect ratio of the nanorods can be tuned by varying the concentration of trisodium citrate. These rectangular nanoparticles were stable for months as colloids. However, after exposure to air for about 100 days, the dry nanoparticles on TEM grids were oxidized to form shells of 1.6−3.8 nm thick covering the nanoparticle surfaces.