bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)

Nanotoday journal's logo

 

25 Top Downloaded Articles

Editorial Calendar 2008

Submit an Article

Editorial Board

Current Issue

S&T journal's cover

 

Sensors & Transducers Journal 2006

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

 

  Best Articles 2006

   

 

 

Vol. 85, Issue 11, November 2007, pp.1687-1698

 

Bullet

 

Optical Characterization of the Interaction of Mercury with Nanoparticulate Gold Suspended in Solution

 

1Kevin SCALLAN, 2Donald LUCAS, and 3Catherine KOSHLAND

1Department of Mechanical Engineering, University of California at Berkeley,

2Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory,

3School of Public Health, University of California at Berkeley, Berkeley, CA 94720

Tel: +1-510-486 4134

E-mail: kscallan@me.berkeley.edu

 

 

Received: 27 February 2007   /Accepted: 20 November 2007   /Published: 26 November 2007

 

Abstract: We have demonstrated that the surface plasmon resonance (SPR) wavelength of gold nanoparticles suspended in solution can be modified by exposure to elemental mercury at sub parts per million (ppm) concentrations in nitrogen. Ultraviolet-visible (UV-vis) absorption spectroscopy was used to monitor the wavelength and maximum absorbance of the colloidal solution during and after the exposure process. Transmission electron microscopy (TEM) images revealed modifications to the morphology of the particles (size, shape, and extent of aggregation). The results show that the SPR wavelength is blue-shifted and the absorbance is increased with exposure time. After the exposure, the spectra were observed to relax toward their original position suggesting that the detection medium is regenerative.

 

Keywords: Mercury, Gold, Nanoparticle, Surface plasmon resonance

 

Acrobat reader logo Click <here> or title of paper to download the full pages article (787 K)

 

 

 

 

Reed more articles and papers about Nanosensors and Nanodevices

 

 


1999 - 2007 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.


Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - e-Shop - Membership

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - Site Map