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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > April  >
In the Laboratory
JCE Classroom Activity
Color My Nanoworld
Adam D. McFarland, Christy L. Haynes, Chad A. Mirkin, Richard P. Van Duyne, and Hilary A. Godwin
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113
Cover
April 2004
Vol. 81 No. 4
p. 544A
Abstract
In this activity, students are introduced to the unique properties of nanoscale materials. The activity begins with the synthesis of 13 nm-diameter gold nanoparticles by reduction of a gold salt. The students use the resulting nanoparticle solution to explore the size-dependent optical properties of gold nanoparticles. Specifically, they determine that the nanoparticle solution functions as an electrolyte sensor because electrolyte-induced aggregation of the nanoparticles results in a dramatic color change.
Supplement
The pdf file contains a full-sized version of the diagram below that illustrates the process of nanoparticle aggregation and the resulting color change of a solution of gold nanoparticles.
*  Contents
*  Download
JCE2004p0544AW.pdf
More Information
*  Citation
 McFarland, Adam D.; Haynes, Christy L.; Mirkin, Chad A.; Van Duyne, Richard P.; Godwin, Hilary A. J. Chem. Educ. 2004 81 544A.
*  Keywords
 Colloids; Introductory / High School Chemistry; Laboratory Instruction; Materials Science; Nanotechnology; Teaching / Learning Aids; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 March 3, 2004
February 23, 2005
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