Ferroelectric Barium Titanate Nanowires: Synthesis, Properties, and Device Applications
Wang, Zhaoyu
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https://hdl.handle.net/2142/83909
Description
Title
Ferroelectric Barium Titanate Nanowires: Synthesis, Properties, and Device Applications
Author(s)
Wang, Zhaoyu
Issue Date
2008
Doctoral Committee Chair(s)
Yu, Min-Feng
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Language
eng
Abstract
With the assistance of nanomanipulation and electron beam deposition techniques, a nanoscale energy converter device was fabricated using an individual BaTiO3 nanowire. In this device, due to the piezoelectric effect, voltage response was generated from the BaTiO3 nanowire by a periodically varying tensile mechanical strain applied with a precision mechanical testing stage. The measured voltage generation from the nanowire was found to be directly proportional to the applied strain rate, and was successfully modeled through consideration of an equivalent circuit for the piezoelectric nanowire under low frequency operation. This device, besides demonstrating a controlled experimental method for the study of direct piezoelectric effect in nanostructures, also implies the use of such perovskite piezoelectric nanowires for efficient energy harvesting applications.
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