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Synthesis and Spectral Studies of CdTe–Dendrimer Conjugates

Ghosh, Srabanti and Saha, Abhijit (2009) Synthesis and Spectral Studies of CdTe–Dendrimer Conjugates. Nanoscale Research Letters, 4 (8). pp. 937-941.

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Official URL: http://www.springerlink.com/content/3m124783855rm7...

Abstract

In order to couple high cellular uptake and target specificity of dendrimer molecule with excellent optical properties of semiconductor nanoparticles, the interaction of cysteine-capped CdTe quantum dots with dendrimer was investigated through spectroscopic techniques. NH2-terminated dendrimer molecule quenched the photoluminescence of CdTe quantum dots. The binding constants and binding capacity were calculated, and the nature of binding was found to be noncovalent. Significant decrease in luminescence intensity of CdTe quantum dots owing to noncovalent binding with dendrimer limits further utilization of these nanoassemblies. Hence, an attempt is made, for the first time, to synthesize stable, highly luminescent, covalently linked CdTe–Dendrimer conjugate in aqueous medium using glutaric dialdehyde (G) linker. Conjugate has been characterized through Fourier transform infrared spectroscopy and transmission electron microscopy. In this strategy, photoluminescence quantum efficiency of CdTe quantum dots with narrow emission bandwidths remained unaffected after formation of the conjugate.

Item Type:Article
Uncontrolled Keywords:Quantum dots - Dendrimer - Conjugate - Infrared spectroscopy - Luminescence
Subjects:Biomedical Science > Nanobiotechnology
ID Code:6512
Deposited By:SPI
Deposited On:28 Jul 2009 10:49
Last Modified:28 Jul 2009 10:49

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