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Simple synthesis of luminescent CdSe quantum dots from ascorbic acid and selenium dioxide
Author(s) -
Wang Yilin,
Yu Meihua,
Yang Kun,
Lu Jianping,
Chen Linqing
Publication year - 2015
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2909
Subject(s) - selenium , ascorbic acid , quantum dot , luminescence , powder diffraction , chemistry , transmission electron microscopy , zinc , aqueous solution , nanotechnology , nuclear chemistry , inorganic chemistry , materials science , organic chemistry , crystallography , optoelectronics , food science
A simple, low‐cost and convenient method was developed for the synthesis of highly luminescent CdSe quantum dots (QDs) in an aqueous medium. Compared with previous methods, this synthesis was carried out in one pot using ascorbic acid (C 6 H 8 O 6 ) to replace NaBH 4 or N 2 H 4 · H 2 O as a reductant, and selenium dioxide to replace selenium or its other hazardous, expensive and unstable compounds as a precursor. The mechanism of CdSe QDs formation was elucidated. The influence of various experimental variables, including refluxing time, Cd/MSA and Cd/Se molar ratios, on the luminescent properties of the QDs were systematically investigated. X‐Ray powder diffraction and transmission electron microscopy characterization indicated that the QDs had a pure cubic zinc‐blended structure with a spherical shape. Copyright © 2015 John Wiley & Sons, Ltd.