Layer-by-Layer Films of Chitosan, Organophosphorus Hydrolase and Thioglycolic Acid-Capped CdSe Quantum Dots for the Detection of Paraoxon

Celeste A. Constantine, Kerim M. Gattás-Asfura, Sarita V. Mello, Gema Crespo, Vipin Rastogi, Tu Chen Cheng, Joseph J. DeFrank, Roger Leblanc

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84 Scopus citations

Abstract

A polyelectrolyte architecture was fabricated that was composed of chitosan and organophosphorus hydrolase polycations along with thioglycolic acid-capped CdSe quantum dots (QDs) as the polyanion. This film was imaged by epifluorescence microscopy. UV-vis and emission spectroscopies were used to monitor the growth of the bilayer film due to the enhanced optical property of QDs. Photoluminescence of the functionalized QDs improved when sandwiched between the polycations layers. The presence of organophosphorus compounds was confirmed through photoluminescence spectroscopy.

Original languageEnglish
Pages (from-to)13762-13764
Number of pages3
JournalJournal of Physical Chemistry B
Volume107
Issue number50
StatePublished - Dec 18 2003

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Constantine, C. A., Gattás-Asfura, K. M., Mello, S. V., Crespo, G., Rastogi, V., Cheng, T. C., DeFrank, J. J., & Leblanc, R. (2003). Layer-by-Layer Films of Chitosan, Organophosphorus Hydrolase and Thioglycolic Acid-Capped CdSe Quantum Dots for the Detection of Paraoxon. Journal of Physical Chemistry B, 107(50), 13762-13764.