Preparation of Hydrophobic Quantum Dots Using Oleylamine-hydrogen Selenide Complex as Precursor

Chem. J. Chinese Universities

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Preparation of Hydrophobic Quantum Dots Using Oleylamine-hydrogen Selenide Complex as Precursor

LIU Jian-Bo, YANG Xiao-Hai, WANG Ke-Min*, TAN Wei-Hong, LI Zhao-Hui, ZHANG Peng-Fei, WANG Dong

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China

Received:2008-08-19 Revised:1900-01-01 Online:2008-12-10 Published:2008-12-10
Contact: WANG Ke-Min

Abstract

Abstract: A novel route was developed to synthesize hydrophobic quantum dots(QDs) using oleylamine-hydrogen selenide complex as the precursor. Fresh H2Se gas was introduced into oleylamine to form oleylamine-hydrogen selenide complex, and the complex was used as the precursor to prepare QDs by hot-injection solvothermal synthesis. The obtained QDs were characterized by photoluminescence spectroscopy, transmission electron microscopy and X-ray diffraction. The results show that the proposed method led to the formation of cubic CdSe QDs with narrow fluorescence full-width at half-maximum(25—40 nm), high photoluminescence quantum yield(up to 23%), and a broad emission spectra tunable from 480—610 nm. This is a low cost and environmentally benign technique for QDs preparation due to the absence of trialkylphosphine.

Key words: Cadmium selenide, Quantum dot, Preparation, Oleylamine-hydrogen selenide complex

CLC Number:

O611.4

TrendMD:

LIU Jian-Bo, YANG Xiao-Hai, WANG Ke-Min*, TAN Wei-Hong, LI Zhao-Hui, ZHANG Peng-Fei, WANG Dong. Preparation of Hydrophobic Quantum Dots Using Oleylamine-hydrogen Selenide Complex as Precursor[J]. Chem. J. Chinese Universities, doi: .

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Preparation of Hydrophobic Quantum Dots Using Oleylamine-hydrogen Selenide Complex as Precursor

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