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Controlled Synthesis of CdSe Quantum Dots by a Microwave‐Enhanced Process: A Green Approach for Mass Production
Author(s) -
Ayele Delele Worku,
Chen HungMing,
Su WeiNien,
Pan ChunJern,
Chen LiangYih,
Chou HungLung,
Cheng JuHsiang,
Hwang BingJoe,
Lee JyhFu
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201003686
Subject(s) - quantum dot , microwave , process (computing) , production (economics) , nanotechnology , optoelectronics , materials science , process engineering , physics , computer science , quantum mechanics , engineering , economics , macroeconomics , operating system
A method that does not employ hot‐injection techniques has been developed for the size‐tunable synthesis of high‐quality CdSe quantum dots (QDs) with zinc blende structure. In this environmentally benign synthetic route, which uses less toxic precursors, solvents, and capping ligands, CdSe QDs that absorb visible light are obtained. The size of the as‐prepared CdSe QDs and thus their optical properties can be manipulated by changing the microwave reaction conditions. The QDs were characterized by XRD, TEM, UV/Vis, FTIR, time‐resolved fluorescence spectroscopy, and fluorescence spectrophotometry. In this approach, the reaction is conducted in open air and at a much lower temperature than in hot‐injection techniques. The use of microwaves in this process allows for a highly reproducible and effective synthesis protocol that is fully adaptable for mass production and can be easily employed to synthesize a variety of semiconductor QDs with the desired properties. Possible applications of the CdSe QDs were assessed by deposition on TiO 2 films.