High-yield fabrication and electrochemical characterization of tetrapodal CdSe, CdTe, and CdSexTe1-x nanocrystals

doi:10.1002/adfm.200500678

CORC > 化学研究所 > 中国科学院化学研究所

	High-yield fabrication and electrochemical characterization of tetrapodal CdSe, CdTe, and CdSexTe1-x nanocrystals
	Li, Yunchao ; Zhong, Haizheng ; Li, Rui ; Zhou, Yi ; Yang, Chunhe ; Li, Yongfang
刊名	ADVANCED FUNCTIONAL MATERIALS
	2006-09-05
卷号	16 期号:13 页码:1705-1716
ISSN号	1616-301X
DOI	10.1002/adfm.200500678
英文摘要	The high-yield fabrication of tetrapodal CdSe, CdTe, and CdSexTe1-x nanocrystals is systematically studied. CdSe nanocrystals are prepared by first controlling the synthesis of high-quality wurtzite CdSe and zinc blende CdSe nanocrystals at a relatively high temperature (260 degrees C) by selecting different ligands. Then, based on the phase control of the CdSe nanocrystals, two nanoparticle-tailoring routes (i.e., a seed-epitaxial route and ligand-dependent multi-injecting route) are used, and a high yield of CdSe tetrapods is obtained. CdTe nanocrystals are prepared by adjusting the ligand composition and the ratio of Cd to Te; CdTe tetrapods are synthesized in high yield using a mixed ligand that does not contain alkylphosphonic acids. Moreover, the nanoscale Te powder (Te nanowires/nanorods), which is highly soluble in the ligand solvent, is first used as a Te source to synthesize CdTe nanocrystals, which remarkably enhanced the output of the CdTe nanocrystals in one reaction. Furthermore, composition-tunable ternary CdSexTe1-x alloyed tetrapods are synthesized on a large scale, for the first time, by thermolyzing the mixture of the organometallic Cd precursor and the mixed (Se + Te) source in a mixed-ligand solution. The CdSe, CdTe, and CdSexTe1-x nanocrystals are characterized by transmission electron microscopy (TEM), high-resolution TEM, selected-area electron diffraction, X-ray diffraction, and UV-vis and photoluminescence (PL) spectroscopy. Interesting nonlinear, composition-dependent absorption and PL spectra are observed for the ternary CdSexTe1-x alloyed nanocrystals. The band-edge positions of the nanocrystals of CdSe, CdSexTe1-x, and CdTe are systematically studied by cyclic voltammetry.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000240560700007
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/59595]
专题	中国科学院化学研究所
通讯作者	Li, Yunchao
作者单位	1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, CAS Key Lab Organ Solids, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Li, Yunchao,Zhong, Haizheng,Li, Rui,et al. High-yield fabrication and electrochemical characterization of tetrapodal CdSe, CdTe, and CdSexTe1-x nanocrystals[J]. ADVANCED FUNCTIONAL MATERIALS,2006,16(13):1705-1716.
APA	Li, Yunchao,Zhong, Haizheng,Li, Rui,Zhou, Yi,Yang, Chunhe,&Li, Yongfang.(2006).High-yield fabrication and electrochemical characterization of tetrapodal CdSe, CdTe, and CdSexTe1-x nanocrystals.ADVANCED FUNCTIONAL MATERIALS,16(13),1705-1716.
MLA	Li, Yunchao,et al."High-yield fabrication and electrochemical characterization of tetrapodal CdSe, CdTe, and CdSexTe1-x nanocrystals".ADVANCED FUNCTIONAL MATERIALS 16.13(2006):1705-1716.