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Comparative study on CdSe QDs synthesized from water and ethanol: Hydrogen bond induced particle agglomeration and enhancement on photoluminescence.
MedLine Citation:
PMID:  23348062     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this paper a comparative study is carried out on the CdSe QDs synthesized from water and ethanol. Our purpose is to present an insight understanding on how hydrogen bonds affect particle agglomeration and consequently photoluminescence (PL) behavior of the QDs. In comparison with those from water, the CdSe QDs from ethanol show super PL with high brightness. Detailed characterization gives the only difference of large agglomerates presented in the QDs from ethanol. The TEM and HRTEM observations reveal a tri-level microstructure for the QDs from ethanol while in the case of those from water it is bi-level. With these direct evidences weak hydrogen bond of TGA with ethanol is proposed to be responsible for these large agglomerates and consequently super PL behavior. Additional investigations on some other alcohols of methanol, n-propanol, and i-butanol yield positive results and confirm the truth of our proposal.
Authors:
Weiguo Tian; Wen Mi; Jintao Tian; Jinqian Jia; Xiaoyun Liu; Zhibin Zhu; Jinhui Dai; Xin Wang
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-25
Journal Detail:
Title:  The Analyst     Volume:  -     ISSN:  1364-5528     ISO Abbreviation:  Analyst     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372652     Medline TA:  Analyst     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Institute of Materials Science and Engineering, Ocean University of China, Songling Road 238, Qingdao 266100, P. R. China. jttian@ouc.edu.cn.
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