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Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems
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Ligand-dependent particle size control of PbSe quantum dots

Author(s)
Baek, In ChanSeok, Sang IlPramanik, Nimai ChandJana, SunirmalLim, Mi AeAhn, Boek YeopLee, Chang JinJeong, Yong Jae
Issued Date
2007-06
DOI
10.1016/j.jcis.2007.01.017
URI
https://scholarworks.unist.ac.kr/handle/201301/18671
Fulltext
http://www.sciencedirect.com/science/article/pii/S0021979707000434
Citation
JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.310, no.1, pp.163 - 166
Abstract
Colloidal solutions of monodisperse PbSe quantum dots (QDs) were synthesized by a hot solution chemical method from a reaction mixture of lead oleate and TOPSe (TOP: tri-n-octylphosphine). The synthesis was carried out at a fixed temperature (170 degrees C) and time, while the particle sizes of the PbSe QDs were controlled by using two different kinds of organic ligands with varied chain length. It was seen that the tuning of PbSe QDs are possible by using the proper molar ratio of the co-ligands, such as acetic acid or hexanoic acid, at a fixed reaction temperature and time, verified by TEM and XRD as well as NIR absorption analysis. The effects of different organic acids were Studied and the role of additional organic acids might be due to the extent of ligand exchange efficiency between the Pb oleate and acetic/hexanoic acid in the initial stage, which is caused by the steric hindrance effects of the acids. (c) 2007 Elsevier Inc. All rights reserved
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
ISSN
0021-9797
Keyword (Author)
particle size controlPbSe quantum dotsligand exchange
Keyword
COLLOIDAL PBSENANOCRYSTALS

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