Investigation on Thickness Effect of Ultrathin Vinylidene Fluoride/Trifluoroethylene Copolymer Films

Mabuchi, Yuichiro; Nakajima, Takashi; Chaudhuri, Kaustav; Evans, James E.; Browning, Nigel D.; Okamura, Soichiro

doi:10.1143/jjap.50.09na05

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…Conventional synthetic piezoelectric films, such as poly(vinylidene fluoride) (PVDF) films, have pyroelectricity. [1][2][3][4][5][6][7][8][9][10][11] When these devices are operated by hand, for example, it is impossible to distinguish whether the sensor signal originated from changes in body temperature or an action (deformation or displacement). More recently, there has been interest in material characteristics and applications of piezoelectric biomass polymers, such as poly(lactic acid) (PLA), that do not demonstrate pyroelectricity.…”

Section: Introductionmentioning

confidence: 99%

Film Sensor Device Fabricated by a Piezoelectric Poly(L-lactic acid) Film

Ando

Kawamura

Kageyama

2012

Jpn. J. Appl. Phys.

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Synthetic piezoelectric polymer films produced from petroleum feedstock have long been used as thin-film sensors and actuators. However, the fossil fuel requirements for synthetic polymer production and carbon dioxide emission from its combustion have raised concern about the environmental impact of its continued use. Eco-friendly biomass polymers, such as poly(L-lactic acid) (PLLA), are made from plant-based (vegetable starch) plastics and, thus, have a much smaller carbon footprint. Additionally, PLLA does not exhibit pyroelectricity or unnecessary poling. This suggests the usefulness of PLLA films for the human–machine interface (HMI). As an example of a new HMI, we have produced a TV remote control using a PLLA film. The intuitive operation provided by this PLLA device suggests that it is useful for the elderly or handicapped.

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Section: Introductionmentioning

confidence: 99%

Film Sensor Device Fabricated by a Piezoelectric Poly(L-lactic acid) Film

Ando

Kawamura

Kageyama

2012

Jpn. J. Appl. Phys.

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High-Symmetry Polarization Domains in Low-Symmetry Ferroelectrics

et al. 2014

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We present experimental evidence for hexagonal domain faceting in the ferroelectric polymer PVDF-TrFE films having the lower orthorhombic crystallographic symmetry. This effect can arise from purely electrostatic depolarizing forces. We show that in contrast to magnetic bubble shape domains where such type of deformation instability has a predominantly elliptical character, the emergence of more symmetrical circular harmonics is favored in ferroelectrics with high dielectric constant.

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