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Wednesday, April 22 • 8:30am - 10:30am
Modeling E&M fields within Periodically Poled Ferroelectric Templates

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An electric field model for ferroelectric templates examines a novel lithography technique which is used in the growth of nanowires. In ferroelectric lithography silver is selectively deposited at the 180 degree domain boundaries of ferroelectric substrates. Current understanding of nanowire production does not have a well-documented explanation of both desired domain boundary wires and undesired interstitial growth. To assist, a model of the electric fields near the surface of ferroelectric templates was created, specifically focusing on periodically poled lithium niobate (PPLN). This model was then utilized to determine how various surface imperfections and material attributes, such as screening properties, affected the electric field and therefore nanowire growth. To test this model a discrete event simulation of the paths of multiple particles was compared to scanning electron microscopy (SEM) images from actual depositions of AgNO3 on PPLN samples. The results and methodology are given here to improve silver nanowires synthesis for use in applications such as surface enhanced Raman spectroscopy and disinfection.


Wednesday April 22, 2015 8:30am - 10:30am PDT
Wilma Sherrill Center Concourse