Baek, In Chan and Seok, Sang Il and Pramanik, Nimai Chand and Jana, Sunirmal and Lim, Mi Ae and Ahn, Boek Yeop and Lee, Chang Jin and Jeong, Yong Jae (2007) Ligand-dependent particle size control of PbSe quantum dots. Journal of Colloid and Interface Science, 310 (1). pp. 163-166. ISSN 0021-9797

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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 ◦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.

Item Type:	Article
Uncontrolled Keywords:	Particle size control; PbSe quantum dots; Ligand exchange
Subjects:	Engineering Materials
Divisions:	Sol Gel
Depositing User:	Bidhan Chaudhuri
Date Deposited:	14 Mar 2012 13:00
Last Modified:	18 Oct 2012 10:54
URI:	http://cgcri.csircentral.net/id/eprint/1217

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