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, Gary Rumbles

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationProceedings - Electrochemical Society
Pages340-349
Number of pages10
VolumePV 2004-22
Publication statusPublished - 2006
Event205th Electrochemical Society Meeting - San Antonio, TX, United States
Duration: May 9 2004May 14 2004

Other

Other205th Electrochemical Society Meeting
CountryUnited States
CitySan Antonio, TX
Period5/9/045/14/04

Fingerprint

Semiconductor quantum dots
Amino acids
Stabilization
Water
Zinc sulfide
Electronic properties
Cadmium
Photoluminescence
Solubility
Acids

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Jones, M., Ding, S. Y., Tucker, M. P., Kim, Y. H., Zhang, S. B., Himmel, M. E., & Rumbles, G. (2006). Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups. In Proceedings - Electrochemical Society (Vol. PV 2004-22, pp. 340-349)

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, Gary.

Proceedings - Electrochemical Society. Vol. PV 2004-22 2006. p. 340-349.

Research output: Chapter in Book/Report/Conference proceedingConference 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 Proceedings - Electrochemical Society. vol. PV 2004-22, pp. 340-349, 205th Electrochemical Society Meeting, San Antonio, TX, United States, 5/9/04.
Jones M, Ding SY, Tucker MP, Kim YH, Zhang SB, Himmel ME et al. Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups. In Proceedings - Electrochemical Society. Vol. PV 2004-22. 2006. p. 340-349
Jones, M. ; Ding, S. Y. ; Tucker, M. P. ; Kim, Y. H. ; Zhang, S. B. ; Himmel, M. E. ; Rumbles, Gary. / Stabilization of (CdSe)ZnS quantum dots in water using amino acid capping groups. Proceedings - Electrochemical Society. Vol. PV 2004-22 2006. pp. 340-349
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