Title page for ETD etd-05102006-155425

Type of Document Master's Thesis
Author Tracy, Nicholas Alan
Author's Email Address ntracy@vt.edu
URN etd-05102006-155425
Title Synthesis and Characterization of Magnetic II-VI Nanoparticles
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Meehan, Kathleen Committee Chair
Hendricks, Robert W. Committee Member
Wyatt, Christopher L. Committee Member
  • biomedical
  • MRI
  • nanoparticles
  • nanocrystals
  • magnetic
Date of Defense 2006-04-26
Availability unrestricted
Magnetic semiconductor nanocrystals are being studied for their potential application in the field of spintronics as spin-injectors for spin-based transistors and spin-based storage elements for nonvolatile memories. They also have a number of biomedical engineering applications including contrast enhancing agents for magnetic resonance imaging (MRI). In this study, we present a synthesis route to grow colloidal II-VI magnetic nanoparticles at room temperature with easily handled, relatively non-toxic source materials. CoSe and CrSe nanocrystals were synthesized in an aqueous solution where gelatin is used to retard the reaction. Characterization of the nanocrystals was done through transmission electron microscope (TEM) imaging and UV-Vis absorption spectroscopy. Spin-carrier relaxation times were determined using a superconducting quantum interference device (SQUID) magnetometer.
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