2016FallSymposiumURCreativityEngagement has ended
Tuesday, December 6 • 10:15am - 12:00pm
Image Analysis of Nanoparticles Grown on Ferroelectric Substrates

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The goal of this research is to improve the quality of nanowires grown on periodically poled (PP) ferroelectric substrates. Image analysis software is used to measure changes in particle size and separation that are caused by varying the growth parameters (i.e. the deposition time and solution concentration). A PP substrate is divided into many oppositely poled electric regions which create anomalously strong electric fields where they are connected. Covering the substrate with a solution of silver nitrate and exposing it to ultraviolet light causes promotion of electrons to the conduction band which are then free to photoreduce the silver. Since the electric field is strongest at the domain boundaries the silver tends to deposit there, creating wire-like structures. Topographic images are then taken with a Scanning Electron Microscope allowing the nanoparticles to be observed. After the pictures are archived the nanoparticles are analyzed further by the software application ImageJ to gather such statistics as the number of particles and their average size. The deposition time and solution concentration are varied during the experiment, creating nanowires of variable size, shape, and separation. Through the analysis of the particles associated with varying parameters we analyze the correlation between particle size and different combinations of depositions times and solution concentrations.


Tuesday December 6, 2016 10:15am - 12:00pm
Wilma Sherrill Center - Concourse