Octapod-Shaped Colloidal Nanocrystals of Cadmium Chalcogenides via "One-Pot" Cation Exchange and Seeded Growth
Octapod-Shaped Colloidal Nanocrystals of Cadmium Chalcogenides via "One-Pot" Cation Exchange and Seeded Growth
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DOI：
10.1021/nl102539a
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发表时间：
2010-09-01
期刊：
影响因子：
10.8
通讯作者：
Manna, Liberato
中科院分区：
文献类型：
--
作者：
Deka, Sasanka;Miszta, Karol;Manna, Liberato
研究了硫族镉化物（Cd E = CdS、CdSe和CdTe）在闪锌矿型Cu 2-xSe纳米晶（尺寸范围10-15 nm）上的生长行为。由于Cu 2-xSe在过量Cd 2+离子存在下进行快速和定量阳离子交换反应的能力，没有获得Cu 2-xSe/CdSe异质结构，而是。构建了由闪锌矿型CdSe核和纤锌矿型CdTe臂组成的支化的CdSe/CdTe纳米晶体。虽然碲化镉生长产生多臂结构与整体四面体对称，硫化镉和CdSe臂生长导致八脚形纳米晶体。这些结果显着不同，从文献中发现的生长的镉闪锌矿的硒化镉颗粒，直到现在一直产生四脚形的纳米晶体。
The growth behavior of cadmium chalcogenides (CdE = CdS, CdSe, and CdTe) on sphalerite Cu2-xSe nanocrystals (size range 10-15 nm) is studied. Due to the capability of Cu2-xSe to undergo a fast and quantitative cation exchange reaction in the presence of excessive Cd2+ ions, no Cu2-xSe/CdE heterostructures are obtained and instead. branched CdSe/CdE nanocrystals are built which consist of a sphalerite CdSe core and wurtzite CdE arms. While CdTe growth yields multiarmed structures with overall tetrahedral symmetry, CdS and CdSe arm growth leads to octapod-shaped nanocrystals. These results differ significantly from literature findings about the growth of CdE on sphalerite CdSe particles, which until now had always yielded tetrapod-shaped nanocrystals.