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Thickness Dependence of Ferroelectricity in Langmuir-Blodgett Multilayer Films of Hemicyanine Dyes

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The thickness dependence of ferroelectricity in hemicyanine Langmuir-Boldgett multilayer films was reported in this paper. By the observed ferroelectric hysteresis loop, it was found that the coercive field decreased with increasing of film thickness monotonously and may be approximated by a power law EcN −4/3 in the range from 30 to 200 nm, which is consistent with other conventional ferroelectric materials. The measurement of dielectric properties give the optimum thickness about 60 nm of hemicyanine LB films and their optimum value as ferroelectric storage-devices has the same order of magnitude as copolymer's P(VDF-TrFE) (70:30 mol%).
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Document Type: Research Article

Publication date: 2012-01-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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