Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups

M. Jones; S. Y. Ding; M. P. Tucker; Y. H. Kim; S. B. Zhang; M. E. Himmel; G. Rumbles

Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups

M. Jones, S. Y. Ding, M. P. Tucker, Y. H. Kim, S. B. Zhang, M. E. Himmel, G. Rumbles

National Renewable Energy Laboratory

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

We report investigations of the binding of amino acids to the surface of colloidal quantum dots that comprise a cadmium selenide core, with a zinc sulfide shell, (CdSe)ZnS. The goal of this work is to replace the TOP/TOPO capping group, created during synthesis, with amino acids that can confer solubility of the quantum dot in a buffered aqueous environment, while retaining or improving the good electronic properties of the quantum dot Steady-state and time-resolved photoluminescence studies, combined with quantum chemical calculations are used to explain the relative efficiency of three amino acids (histidine, lysine and cysteine) to bind and passivate the quantum dot surface as a function of pH. These results are compared to the more common mercaptopropionic acid that is often used to solubilize these QDs in water.

Original language	English
Title of host publication	Electron Transfer in Nanomaterials - Proceedings of the International Symposium
Pages	340-349
Number of pages	10
Publication status	Published - Oct 16 2006
Event	205th Electrochemical Society Meeting - San Antonio, TX, United States Duration: May 9 2004 → May 14 2004

Publication series

Name	Proceedings - Electrochemical Society
Volume	PV 2004-22

Other

Other	205th Electrochemical Society Meeting
Country	United States
City	San Antonio, TX
Period	5/9/04 → 5/14/04

ASJC Scopus subject areas

Engineering(all)

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Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups. / Jones, M.; Ding, S. Y.; Tucker, M. P.; Kim, Y. H.; Zhang, S. B.; Himmel, M. E.; Rumbles, G.

Electron Transfer in Nanomaterials - Proceedings of the International Symposium. 2006. p. 340-349 (Proceedings - Electrochemical Society; Vol. PV 2004-22).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Jones, M, Ding, SY, Tucker, MP, Kim, YH, Zhang, SB, Himmel, ME & Rumbles, G 2006, Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups. in Electron Transfer in Nanomaterials - Proceedings of the International Symposium. Proceedings - Electrochemical Society, vol. PV 2004-22, pp. 340-349, 205th Electrochemical Society Meeting, San Antonio, TX, United States, 5/9/04.

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