Piezoelectric properties of polyelectrolyte multilayer films

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2015
Sever, Özlem
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Piezoelectric material is the material which converts the electrical energy to the mechanical energy or mechanical energy to the electrical energy. Piezoelectricity is usually considered as a property of ceramic materials because their crystal lattice structure does not have a centre of symmetry, as a result, the unit cells of ceramics contain a small electric dipole. However, after piezoelectric properties of poly(vinylidene fluoride) (PVDF) were discovered, polymeric materials have been preferred over the ceramic ones due to their high flexibility, low cost, high chemical stability, etc.. In order to obtain piezoelectric properties, electrical poling process has to be applied to the materials, which means that they have to be polarized. Layer-by-layer self-assembly is a technique to produce ultra-thin multilayer films. It is based on alternating deposition of oppositely charged polyelectrolytes at the surface. LbL films have been investigated as potential piezoelectric materials due to polarization within the multilayers, eliminating the electrical poling treatment to obtain a piezoelectric material. In this study, piezoelectric characteristics of LbL films of different polyelectrolyte pairs have been examined and contrasted.
Piezoelectricity., Polyelectrolytes., Thin films., Electric fields., Electrostatics.
http://etd.lib.metu.edu.tr/upload/12618727/index.pdf
https://hdl.handle.net/11511/24641
Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats
Ö. Sever, “Piezoelectric properties of polyelectrolyte multilayer films,” M.S. - Master of Science, Middle East Technical University, 2015.
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