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THE SURFACE MODIFICATION OF CdSe–TGA QUANTUM DOTS WITH MULTIDENTATE BIOPOLYMER LIGAND BASED ON SALEP: AN EASY ROUTE FOR ENHANCING FLUORESCENCE INTENSITY

Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran

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Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran

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Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran

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Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran

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Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran

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https://doi.org/10.1142/S1793292013500124Cited by:0 (Source: Crossref)

Abstract

The optical properties of CdSe quantum dots (QDs) capped by thioglycolic acid (TGA) before and after surface modification with poly (acrylic acid) grafted onto salep (salep-g-PAA), as a biopolymer-based multidentate ligand, were examined. The results showed that the fluorescence intensity as well as the stability of CdSe QDs was incredibly increased after surface modification with the biopolymer-based ligand. To provide more evidence for the occurrence of surface modification, the prepared CdSe–salep-g-PAA QDs were characterized by thermo-gravimetric analysis (TG), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR).

Keywords:

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Vol. 08, No. 02

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History

Received 6 September 2012

Revised 26 December 2012

Accepted 27 December 2012

Published: 8 February 2013

Keywords