Preparation, characterization, surface modification and redox reactions of silver nanoparticles in the presence of tryptophan

被引：21

作者：

Jacob, Jasmine A. ^{[1
]}

Naumov, Sergej ^{[2
]}

Mukherjee, Tulsi ^{[1
]}

Kapoor, Sudhir ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiat & Photochem Div, Bombay 400085, Maharashtra, India

[2] Leibniz Inst Oberflachenmodifizierung, D-04318 Leipzig, Germany

来源：

COLLOIDS AND SURFACES B-BIOINTERFACES | 2011年 / 87卷 / 02期

关键词：

Electron microscopy; Dynamic light scattering; Surface modification; DENSITY-FUNCTIONAL THERMOCHEMISTRY; GOLD NANOPARTICLES; EXACT-EXCHANGE; RADICALS; METAL; RAMAN; ADSORPTION; REDUCTION; PARTICLES; CHEMISTRY;

D O I：

10.1016/j.colsurfb.2011.06.017

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The synthesis and characterization of water-soluble dispersions of Ag nanoparticles by the reduction of AgNO(3) using tryptophan under alkaline synthesis conditions are reported. The Ag nanoparticle formation was very slow at low concentration and rapid at extremes. For surface modification and redox reactions, manipulating the interparticles interaction controlled the size of Ag nanoparticles aggregates. Our results suggest that the replacement of the BH(4)(-) ions adsorbed on the nanoparticle surface by tryptophan destabilizes the particles and further caused aggregation. A mechanism is proposed for the formation of silver nanoparticles by tryptophan. The experimental results are supported by theoretical calculations. The Ag nanoparticles were characterized by UV-vis absorption, dynamic light scattering and transmission electron microscopy techniques. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：498 / 504

页数：7

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