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Study of the Effect of Nanostructuring on the Magnetic and Electrocatalytic Properties of Metals and Metal Oxides

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2015, Doctor of Philosophy, Case Western Reserve University, Chemistry.
Nanomaterials have attracted significant interest over the years due to their unique properties that can be tuned by controlling their size, shape and morphology. Metal and metal oxide nanoparticles have shown great potential in a plethora of applications from electronics to diagnostic systems, to biomedical and environmental sensors. In this work the effect of nanostructuring of metal and metal oxides for biomedical and environmental applications was studied. The metals investigated were the noble metals: silver, gold, platinum, and the effect of their nanostructuring was investigated for the electrochemical enzymeless detection of hydrogen peroxide and detection of toxic gases. Of special interest were hollow metal nanostructures, which are intriguing electrocatalytic materials that have shown superior properties as compared to their solid counterparts due to an increased surface area, low density, and high void ratio. The preparation and characterization of various hollow noble metal nanostructures with different compositions, shape, and surface morphology, and their application in biomedical and environmental sensors was addressed in this work. On the other hand, the metal oxides investigated consisted of iron oxide nanoparticles. Iron oxide nanoparticles were chosen due to their biocompatible, non-toxic, and tunable magnetic properties characteristics. The iron oxide phase of interest for this work was magnetite, which has one of the highest saturation magnetization of the different phases. The nanostructuring of magnetite nanoparticles was investigated for hyperthermia treatment and drug delivery applications. Moreover, metal-metal oxide hybrids were studied for the apprehension, retention, and treatment of water pathogens, whereas the metal component facilitated the detection and the magnetic component contributed to the magnetic separation and hyperthermia treatment of the pathogens. This work demonstrates that the tailoring of the structure morphology and composition of nanomaterials is essential in obtaining extremely responsive materials for specific applications.
Anna Cristina Samia, Ph.D. (Advisor)
Clemens Burda, Ph.D. (Committee Chair)
Malcolm Kenney, Ph.D. (Committee Member)
John Protasiewicz, Ph.D. (Committee Member)
Chung-Chiun Liu, Ph.D. (Committee Member)
290 p.

Recommended Citations

Citations

  • Popa, A. (2015). Study of the Effect of Nanostructuring on the Magnetic and Electrocatalytic Properties of Metals and Metal Oxides [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1427735465

    APA Style (7th edition)

  • Popa, Adriana. Study of the Effect of Nanostructuring on the Magnetic and Electrocatalytic Properties of Metals and Metal Oxides. 2015. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1427735465.

    MLA Style (8th edition)

  • Popa, Adriana. "Study of the Effect of Nanostructuring on the Magnetic and Electrocatalytic Properties of Metals and Metal Oxides." Doctoral dissertation, Case Western Reserve University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1427735465

    Chicago Manual of Style (17th edition)