Distributed array of polymeric piezo-nanowires through hard-templating method into porous alumina (original) (raw)
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Wet-impregnation of poly(vinylidene fluoride-tri fluoro ethylene) PVDF TrFE) was performed into commercially available porous Anodic Alumina Membrane (AAM, nominal pore size 200 nm, thickness 60 µm), leading to an array of distributed polymeric 1D nanostructures in the AAM. The templated PVDF-TrFE) nanowires showed a diameter of about 200 nm, several microns in length and a high filling ratio of the AAM channels. X-ray diffraction and infrared spectroscopy showed the crystallization of the polymer into the ferroelectric β-phase, with crystal lamellae oriented perpendicularly to the AAM channel walls. Here ferroelectric polarization, hysteresis and displacement loops were recorded for the first time, showing a remarkable piezoelectric behavior of these 1-D polymeric nanostructures. I-V characteristics showed a consistent switching behavior of the ferroelectric polar domains, thus revealing the importance of the confined and oriented crystallization of the polymer in mono-dimensional nano-structures.
NANOPOROUS ANODIC ALUMINA WIRE TEMPLATES FOR NANOWIRE DEVICES
NATO Advanced Research Workshop on Electron Transport in Nanosystems,, 2008
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