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Interaction of (−)-Epigallocatechin Gallate and Silver Colloid with Bovine Serum Albumin

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Abstract:

The interaction between borate-ion-stabilized silver (Ag) nanoparticles and (−)-epigallocatechin gallate (EGCG) has been investigated. The added EGCG molecules chelate with the borate ions to form a borate ester. This complex provides a better stability to the metal particles by formation of a cap around them. The spectral line profile of the surface plasmon resonance band of the metal particles has been used to probe the metal‐molecule interactions. The withdrawal of electron density from the surface of the Ag particle by the phenolic group of EGCG molecule results in a red-shift of the surface plasmon resonance band of the particles in the sol. In this study we show that both borate-ester-capped Ag nanoparticles and the borate ester itself can be transported by blood plasma serum albumin.

Keywords: EGCG; Silver colloid; Surface plasmons resonance

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/10-06188

Affiliations: 1: Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, India 2: and Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India 3: Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India

Publication date: January 1, 2012

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