纳米棒
纤锌矿晶体结构
光致发光
材料科学
纳米晶
发光
异质结
纳米技术
光电子学
四足动物(结构)
锌
纳米结构
化学工程
冶金
古生物学
工程类
生物
作者
Dmitri V. Talapin,James H. Nelson,Elena V. Shevchenko,Shaul Aloni,Bryce Sadtler,A. Paul Alivisatos
出处
期刊:Nano Letters
[American Chemical Society]
日期:2007-09-11
卷期号:7 (10): 2951-2959
被引量:719
摘要
We have demonstrated that seeded growth of nanocrystals offers a convenient way to design nanoheterostructures with complex shapes and morphologies by changing the crystalline structure of the seed. By using CdSe nanocrystals with wurtzite and zinc blende structure as seeds for growth of CdS nanorods, we synthesized CdSe/CdS heterostructure nanorods and nanotetrapods, respectively. Both of these structures showed excellent luminescent properties, combining high photoluminescence efficiency (approximately 80 and approximately 50% for nanorods and nanotetrapods, correspondingly), giant extinction coefficients (approximately 2 x 10(7) and approximately 1.5 x 10(8) M(-1) cm(-1) at 350 nm for nanorods and nanotetrapods, correspondingly), and efficient energy transfer from the CdS arms into the emitting CdSe core.
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