The change of absorption spectrum of colloidal Au particles in water-ethanol solution
Journal Title: Science Paper Online - Year 2007, Vol 2, Issue 4
Abstract
Stable colloidal Au particles with mean diameter about 5nm in water solution are obtained by reduction of AuCl4- using NaBH4. The wavelength and strength of surface plasma resonance (SPR) absorption of colloidal Au particles vary with ratio of ethanol to water in the solution. This has been attributed to the change of surrounding medium around Au nanoparticles after addition of ethanol into the colloidal solution. It is found that the addition of ethanol could modify both solution dielectric function and the double-electrical layers structures of Au particles, which induces opposite effects on SPR wavelength of colloidal Au particles.
Authors and Affiliations
Chunxia Wang, Yong Wang, Shengyue Wang
Keywords
Related Articles
- EP ID EP129014
- DOI -
- Views 93
- Downloads 0
古冶炼废渣急性毒性危害试验研究
对古冶炼废渣中重金属进行总量分析，针对古冶炼废渣长久堆放后废渣浸出液的急性毒性进行探讨。结果表明: 废渣中残留重金属(Zn+Pb)平均含量高达6.97%，经几百年风化与雨水淋滤，其中1.71%以上的Zn+Pb已经释放到周围环境中。古冶炼废渣浸出...
智能化微囊膜研究新进展
智能化控制释放系统一直是国内外科技工作者的研究热点，迄今已经研究报道了多种具有不同工作原理的环境感应型智能化微囊膜。本文介绍作者近几年在温度感应型、葡萄糖浓度感应型以及分子识别型等环境感应型智能化微囊膜方面取得的成果，并...
Boolean operation based on MPU method for point clouds
Point cloud models using discrete points as primitive element，however point cloud models usually can not be used directly. According to different applications, have to adopt different surface reconstruction methods. Wit...
Experimental study on viscosity properties of molten Zr50Cu50 alloy by rotating cylinder method
The dynamic viscosity of molten Zr50Cu50 alloy was measured by using rotating cylinder method and its variation with temperature was explored. The experimental results showed that viscosity of the molten alloy increases...
Fitting an isoefficiency curve for axial flow pump based on cubic uniform B-spline
We introduced the Cubic uniform B-spline fitting method for isoefficiency curve of the comprehensive characteristics of the axial flow pump. Various shapes of isoefficiency curves can be achieved by setting different cur...