Nanoscale Control of Polymer Crystallization by Nanoimprint Lithography

Hu, Zhijun; Baralia, Gabriel G.; Bayot, Vincent; Gohy, Jean‐François; Jonas, Alain M.

doi:10.1021/nl051097w

Cited by 145 publications

(165 citation statements)

References 47 publications

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“…7,14 Results of nanoconfinement effects such as spontaneous polarization can eliminate external electrical poling process for polar phase transition. 19,20,31 Beyond the controversy, nanowires have made great impacts on many disciplines including solar cells, biosensors and phase change memory devices. 35À38 A similar impact is also expected on piezoelectric applications using PVDF nanowires.…”

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confidence: 99%

Spontaneous High Piezoelectricity in Poly(vinylidene fluoride) Nanoribbons Produced by Iterative Thermal Size Reduction Technique

et al. 2014

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We produced kilometer-long, endlessly parallel, spontaneously piezoelectric and thermally stable poly(vinylidene fluoride) (PVDF) micro- and nanoribbons using iterative size reduction technique based on thermal fiber drawing. Because of high stress and temperature used in thermal drawing process, we obtained spontaneously polar γ phase PVDF micro- and nanoribbons without electrical poling process. On the basis of X-ray diffraction (XRD) analysis, we observed that PVDF micro- and nanoribbons are thermally stable and conserve the polar γ phase even after being exposed to heat treatment above the melting point of PVDF. Phase transition mechanism is investigated and explained using ab initio calculations. We measured an average effective piezoelectric constant as -58.5 pm/V from a single PVDF nanoribbon using a piezo evaluation system along with an atomic force microscope. PVDF nanoribbons are promising structures for constructing devices such as highly efficient energy generators, large area pressure sensors, artificial muscle and skin, due to the unique geometry and extended lengths, high polar phase content, high thermal stability and high piezoelectric coefficient. We demonstrated two proof of principle devices for energy harvesting and sensing applications with a 60 V open circuit peak voltage and 10 μA peak short-circuit current output. (Figure Presented). © 2014 American Chemical Society

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confidence: 99%

Spontaneous High Piezoelectricity in Poly(vinylidene fluoride) Nanoribbons Produced by Iterative Thermal Size Reduction Technique

et al. 2014

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“…Recently Hu et al fabricated nanoscale patterns of PVDF using nanoim-printing lithography. [15] The confined crystallization and resulting molecular ordering of a-type PVDF crystals was successfully demonstrated not only in nanoscopic trenches produced by the nanoimprinting but also in nanotubes of anodized aluminum oxide (AAO) membrane. [16] We also utilized capillary molding and reported micrometer-scale pattern formation of PVDF with controlled crystal orientation.…”

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confidence: 99%

Localized Pressure‐Induced Ferroelectric Pattern Arrays of Semicrystalline Poly(vinylidene fluoride) by Microimprinting

et al. 2007

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“…Recently Hu et al have fabricated nanometer scale patterns of PVDF using nanoimprinting lithography [57]. The confined crystallization and resulting molecular ordering of α type PVDF crystals was successfully demonstrated not only in the nanoscopic trenches produced by nano-imprinting but also in the nano-tubes of anodized aluminum oxide membrane.…”

Section: Patterning Of Ferroelectric Polymersmentioning

confidence: 99%

Recent Development in Polymer Ferroelectric Field Effect Transistor Memory

Park¹,

Jeong²,

Chang³

et al. 2008

JSTS:Journal of Semiconductor Technology and Science

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Abstract-The article presents the recent research development in polymer ferroelectric non-volatile memory. A brief overview is given of the history of ferroelectric memory and device architectures based on inorganic ferroelectric materials. Particular emphasis is made on device elements such as metal/ferroelectric/metal type capacitor, metalferroelectric-insulator-semiconductor (MFIS) and ferroelectric field effect transistor (FeFET) with ferroelectric poly(vinylidene fluoride) (PVDF) and its copolymers with trifluoroethylene (TrFE). In addition, various material and process issues for realization of polymer ferroelectric non-volatile memory are discussed, including the control of crystal polymorphs, film thickness, crystallization and crystal orientation and the unconventional patterning techniques.

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Nanoscale Control of Polymer Crystallization by Nanoimprint Lithography

Cited by 145 publications

References 47 publications

Spontaneous High Piezoelectricity in Poly(vinylidene fluoride) Nanoribbons Produced by Iterative Thermal Size Reduction Technique

Spontaneous High Piezoelectricity in Poly(vinylidene fluoride) Nanoribbons Produced by Iterative Thermal Size Reduction Technique

Localized Pressure‐Induced Ferroelectric Pattern Arrays of Semicrystalline Poly(vinylidene fluoride) by Microimprinting

Recent Development in Polymer Ferroelectric Field Effect Transistor Memory

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