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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > November  >
In the Laboratory
Quantum Dots: An Experiment for Physical or Materials Chemistry
L. D. Winkler, J. F. Arceo, W. C. Hughes, B. A. DeGraff, and B. H. Augustine
Departments of Chemistry and Physics, James Madison University, Harrisonburg, VA 22807
Cover
November 2005
Vol. 82 No. 11
p. 1700
Abstract
An experiment involving the synthesis and optical characterization of nanoparticles of the semiconductor CdS is described. The synthesis uses inexpensive chemicals, a simple setup, and can be completed in less than one hour. The synthesis is also considerably less hazardous than other protocols as solvents, reaction conditions, and reagents are all suitable for undergraduate use. The optical characterization is by absorption and emission spectroscopy. Simple theory allows the calculation of the effects of quantum confinement to be correlated with the observed spectra. The experiment provides a bridge between the molecular and the solid state worlds.
Supplement
Instructions for the student laboratory writeup, notes for the instructor, suggestions for supplemental work, and a Mathcad template are available.
*  Contents JCE2005p1700W.mcd (Mathcad)
*  Download
JCE2005p1700W.pdf

JCE2005p1700W.zip
More Information
*  Citation
 Winkler, L. D.; Arceo, J. F.; Hughes, W. C.; DeGraff, B. A.; Augustine, B. H. J. Chem. Educ. 2005 82 1700.
*  Keywords
 Fluorescence Spectroscopy; Hands-On Learning / Manipulatives; Laboratory Instruction; Materials Science; Nanotechnology; Photochemistry; Physical Chemistry; Quantum Chemistry; Semiconductors; Upper-Division Undergraduate
*  History
 Created:
Last Updated:		 9/22/2005
9/29/2005
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