A surfactant-free recipe for shape-controlled synthesis of CdSe nanocrystals

doi:10.1088/0957-4484/22/4/045604

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	A surfactant-free recipe for shape-controlled synthesis of CdSe nanocrystals
	Liu, Hongmei 1; Tao, Hong 1; Yang, Tingbin 1; Kong, Lingbin 2; Qin, Donghuan 1; Chen, Junwu 1
刊名	NANOTECHNOLOGY
	2011-01-28
卷号	22 期号:4
关键词	Cadmium Carboxylation II-VI semiconductors Nanocrystals Palmitic acid Saturated fatty acids Selenium compounds Surface active agents Temperature Anisotropic growth Controlled morphology Monomer concentration Preparation conditions Reaction temperature Shape controlled synthesis Trioctylphosphine oxide Trioctylphosphines
ISSN号	0957-4484
DOI	10.1088/0957-4484/22/4/045604
英文摘要	We described surfactant-free recipes for the synthesis of CdSe nanocrystals (NCs) with well-controlled morphologies at a relatively low temperature. Dot-, rod-, tetrapod-and sphere-shaped CdSe NCs were prepared with trioctylphosphine oxide (TOPO) as a non-equilibrium solvent and trioctylphosphine selenide (TOPSe) and cadmium carboxylates as Se and Cd precursors, respectively. It was found that the morphology and stacking pattern of the CdSe NCs were related to the preparation conditions such as the concentration of the injected TOPSe(monomer concentration), reaction temperature and chain length of the cadmium carboxylate precursors. At a reaction temperature of 240 degrees C, CdSe NCs with a tetrapod selectivity of up to 85% were obtained in the presence of cadmium myristate under high concentrated TOPSe injection, and the in situ-formed myristic acid supplied the best acidic ligand with optimal amount to stabilize the anisotropic growth of the tetrapods. The intentional addition of more myristic acid in the reaction system would block the growth pathway of the tetrapods. Using cadmium laurate, cadmium palmitate and cadmium stearate as the cadmium precursors would reduce the formation of the tetrapods, showing the very low selectivity of the tetrapods.
资助项目	SCUT[2009ZZ0003]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000285455200012
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35143]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Qin, Donghuan
作者单位	1.S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Key Lab Special Funct Mat, Guangzhou 510640, Guangdong, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hongmei,Tao, Hong,Yang, Tingbin,et al. A surfactant-free recipe for shape-controlled synthesis of CdSe nanocrystals[J]. NANOTECHNOLOGY,2011,22(4).
APA	Liu, Hongmei,Tao, Hong,Yang, Tingbin,Kong, Lingbin,Qin, Donghuan,&Chen, Junwu.(2011).A surfactant-free recipe for shape-controlled synthesis of CdSe nanocrystals.NANOTECHNOLOGY,22(4).
MLA	Liu, Hongmei,et al."A surfactant-free recipe for shape-controlled synthesis of CdSe nanocrystals".NANOTECHNOLOGY 22.4(2011).