Date of Award
5-2004
Degree Type
Thesis
Degree Name
M.S.
Degree Program
Chemistry
Department
Chemistry
Major Professor
O'Connor, Charles
Second Advisor
Fang, Jiye
Third Advisor
Wiley, John B.
Fourth Advisor
Stokes, Kevin
Abstract
Au-coated magnetic Fe nanoparticles have been successfully synthesized by partial replacement reaction in a polar aprotic solvent with about 11 nm core of Fe and about 2.5 nm shell of Au. In this work, a combination of TEM (transmission electron microscopy), XRD (X-ray Powder Diffractometry), EDS (Energy disperse X-ray spectroscopy), SQUID (Superconducting Quantum Interference Device), TGA (Thermograviometric analysis), UV-visible absorption spectroscopy and Faraday rotation were employed to characterize the morphology, structure, composition and magnetic properties of the products. HRTEM images show clear core-shell structure with different crystal lattices from Fe and Au. SQUID magnetometry reveals that particle magnetic properties are not significantly affected by the overlayer of a moderately thick Au shell. The Au-coated particles exhibit a surface plasmon resonance peak that red-shifts from 520 to 680 nm. And all the above characterizations show that in this sample, there are no Fe oxides inside the particle.
Recommended Citation
Ban, Zhihui, "The Synthesis of Core-Shell Iron@Gold Nanoparticles and Their Characterization" (2004). University of New Orleans Theses and Dissertations. 83.
https://scholarworks.uno.edu/td/83
Rights
The University of New Orleans and its agents retain the non-exclusive license to archive and make accessible this dissertation or thesis in whole or in part in all forms of media, now or hereafter known. The author retains all other ownership rights to the copyright of the thesis or dissertation.