期刊
TALANTA
卷 69, 期 4, 页码 873-876出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2005.11.038
关键词
gold nanoparticles; ionic strength; surface plasmons
Unmodified and modified gold nanoparticles are proposed as sensors using the red to blue transition as an indicator. This work indicates that ionic content is an important variable to track in analytical samples and during the sensor fabrication processes. Mono and multivalent salts where the titrants for a standard gold nanoparticle solution. Multivalent cation salt titrants exhibited a greater sensitivity to color change than monovalent cation salts. The data suggest that specific surface adsorption is the predominant mechanism for the red to blue color change not aggregation. The 3-7 nm Debye length for divalent cations versus the 0.5-1.5 nm for monovalent cations indicates surface electrodynamic resonance effects are an important factor in the observed color changes. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据