Browsing by Subject "magnetic materials"

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    Controlled short time large scale synthesis of magnetic cobalt nanoparticles on carbon nanotubes by flash annealing
    (AIP, 2020) Mosey, Aaron; Yue, Lanping; Gaire, Babu; Ryu, Jong Eun; Cheng, Ruihua; Physics, School of Science
    Nanopatterned arrays of discrete cobalt nanostructures showing characteristic parameter-dependent sizes are formed from continuous thin films on a carbon nanotube substrate using millisecond pulsed intense UV light. The nanoparticles exhibit ferromagnetic behavior with magnetic remanence and coercivity depending on the particle size. The end-state particle size is shown to be a function of initial thin film thickness and excitation energy and is therefore tunable. The evolutionary process from continuous thin films to a discrete morphology is thermodynamically driven by the large surface energy difference between metastable thin films and the underlying carbon nanotube substrate. Evidence of the Danielson model of the dewetting process is observed. These arrays can find applications as platforms for the self-assembly of magnetically susceptible materials, such as iron or nickel nanostructures, into a conduction matrix for applications in energy extraction from a latent heat storage device.
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    SIMULINK Simulation of an Air-gapless Motor
    (2018-10-08) Tang, Chuyue; Dos Santos, Euzeli Cipriano; King, Brian; Li, Lingxi
    A SIMULINK simulation is presented for an air-gapless motor in this thesis. By considering magnetic saturation effect, four materials are compared and discussed in Chapter three.