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Ferroelectric And Dielectric Properties Of Electroactive Oligomers And Nanocomposites, Kristin Leigh Kraemer
Ferroelectric And Dielectric Properties Of Electroactive Oligomers And Nanocomposites, Kristin Leigh Kraemer
Department of Physics and Astronomy: Dissertations, Theses, and Student Research
Polyvinylidene fluoride (PVDF) and its copolymers have been well established as ferroelectric polymers. The dielectric and ferroelectric properties for vinylidene fluoride (VDF) oligomer thin films were investigated. By synthesizing oligomers instead of long polymer chains, films with higher crystalinity can be formed and the locations of oligomers can be controlled for applications such as molecular electronics.
Evidence of ferroelectricity was observed in oligomer thin films evaporated onto room temperature substrates and by Langmuir-Blodgett (LB) deposition. Voltage and frequency dependence of the capacitance was measured. Oligomers functionalized with phosphonic acid formed self-assembled monolayers (SAM) on aluminum and mica substrates. Film thickness …