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.
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics
GOUTAM KUMAR CHANDRA, DEBI RANJAN TRIPATHY, ANUSHREE ROY, and SWAGATA DASGUPTA, "Interaction of (−)-Epigallocatechin Gallate and Silver Colloid with Bovine Serum Albumin," Appl. Spectrosc. 66, 75-81 (2012)