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Electron Microscopy of Mesoscale Arrays of Quantum-Confined CdS Nanoparticles Formed on DNA Templates

Published online by Cambridge University Press:  15 February 2011

Russell F. Pinizzotto ,
Young G. Rho ,
Yandong Chen ,
Robert M. Pirtle ,
Irma L. Pirtle ,
Jeffery L. Coffer  and
Xin Li
Russell F. Pinizzotto
Affiliation:
Materials Science Department, University of North Texas, Denton, TX 76203
Young G. Rho
Affiliation:
Materials Science Department, University of North Texas, Denton, TX 76203
Yandong Chen
Affiliation:
Materials Science Department, University of North Texas, Denton, TX 76203
Robert M. Pirtle
Affiliation:
Department of Biological Sciences, University of North Texas, Denton, TX 76203
Irma L. Pirtle
Affiliation:
Department of Biological Sciences, University of North Texas, Denton, TX 76203
Jeffery L. Coffer
Affiliation:
Department of Chemistry, Texas Christian University, Fort Worth, TX 76129
Xin Li
Affiliation:
Department of Chemistry, Texas Christian University, Fort Worth, TX 76129
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Abstract

This paper describes the fabrication method and initial characterization of self-assembled mesoscale arrays of quantum-confined CdS nanoparticles using DNA as a template for the overall shape. Three DNAs were used: the circular and linear forms of the plasmid pUCLeu4, and circular φ×174 RF II. In all three cases, the mesoscale lengths are consistent with the A-form of DNA. The structural signatures and crystallography were confirmed using conventional and high resolution transmission electron microscopy, and electron diffraction. Optical spectroscopy demonstrated that the particles display quantum-confinement effects. This research is a fundamental demonstration of the power of combining biochemical and solid-state processing techniques.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 591
Copyright
Copyright © Materials Research Society 1997

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