Surfactant- and temperature-controlled CdS nanowire formation

被引:39
作者
Kang, Chia-Cheng
Lai, Chih-Wei
Peng, Hsin-Chieh
Shyue, Jing-Jong [1 ]
Chou, Pi-Tai
机构
[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
[2] Acad Sinica, Res Ctr Appl Sci, Taipei 106, Taiwan
关键词
cadmium; nanowires; semiconductors; synthetic methods;
D O I
10.1002/smll.200700390
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A solution-based synthesis of temperature-controlled CdS nanowires free from metal catalysts by using a mixture of surfactants was reported. The Transmission Electron Microscopy (TEM) images of CdS nanorods at 280°C show that the highly stable zinc blend structures form elongated structures with a nearly mono-dispersed lateral dimension. The X-Ray Diffraction (XRD) pattern of the elongated nanowires prepared at 320°C shows the diffraction peaks matching the wurtzite CdS standard pattern. The anisotropic growth of the nanocrystals is found to be due to the high monomer concentration after the nucleation stage. The luminescence peaks around 455 nm originates from the band edge of the as-prepared CdS nanorods and nanowires. The broad band emission from 525 nm extended to the region of near infrared arises from the defect states of CdS nanocrystals.
引用
收藏
页码:1882 / 1885
页数:4
相关论文
共 55 条
[31]   Controlled growth of tetrapod-branched inorganic nanocrystals [J].
Manna, L ;
Milliron, DJ ;
Meisel, A ;
Scher, EC ;
Alivisatos, AP .
NATURE MATERIALS, 2003, 2 (06) :382-385
[32]   Colloidal nanocrystal heterostructures with linear and branched topology [J].
Milliron, DJ ;
Hughes, SM ;
Cui, Y ;
Manna, L ;
Li, JB ;
Wang, LW ;
Alivisatos, AP .
NATURE, 2004, 430 (6996) :190-195
[33]   Synthesis and properties of CdSe/ZnS core/shell nanorods [J].
Mokari, T ;
Banin, U .
CHEMISTRY OF MATERIALS, 2003, 15 (20) :3955-3960
[34]   Shape control of CdSe nanocrystals [J].
Peng, XG ;
Manna, L ;
Yang, WD ;
Wickham, J ;
Scher, E ;
Kadavanich, A ;
Alivisatos, AP .
NATURE, 2000, 404 (6773) :59-61
[35]   Mechanisms for the shape-control and shape-evolution of colloidal semiconductor nanocrystals [J].
Peng, XG .
ADVANCED MATERIALS, 2003, 15 (05) :459-463
[36]   Nearly monodisperse and shape-controlled CdSe nanocrystals via alternative routes: Nucleation and growth [J].
Peng, ZA ;
Peng, XG .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (13) :3343-3353
[37]   Mechanisms of the shape evolution of CdSe nanocrystals [J].
Peng, ZA ;
Peng, XG .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (07) :1389-1395
[38]   Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor [J].
Peng, ZA ;
Peng, XG .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (01) :183-184
[39]  
Pradhan N., 2006, NANO LETT, V6, P720
[40]   The empirical correlation between size and two-photon absorption cross section of CdSe and CdTe quantum dots [J].
Pu, Shih-Chieh ;
Yang, Meng-Ju ;
Hsu, Cheng-Chih ;
Lai, Chih-Wei ;
Hsieh, Cheng-Chih ;
Lin, Sheng Hsien ;
Cheng, Yi-Ming ;
Chou, Pi-Tai .
SMALL, 2006, 2 (11) :1308-1313