Pyroelectric and dielectric characterisation of alternate layer Langmuir–Blodgett films incorporating ions |
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| Affiliation: | 1. Nano-Science & Technology Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China;2. Department of Chemistry, College of Science, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China;1. Materials Science and Nanotechnology Engineering Deparment, Faculty of Engineering, University of Usak, Usak, Turkey;2. Department of Physics, Faculty of Science, University of Balıkesir, Balıkesir, Turkey;3. Department of Chemistry, Faculty of Science, University of Balıkesir, Balıkesir, Turkey;1. Usak University, Faculty of Engineering, Materials Science and Nanotechnology, Engineering Deparment, Usak, Turkey;2. Balikesir University, Faculty of Science, Physics Deparment, Balikesir, Turkey;3. Bozok University, Faculty of Science, Chemistry Department, Yozgat, Turkey;1. Department of Health and Environment, Kosin University, Dong Sam Dong, Young Do Gu, Busan, South Korea;2. Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do 627-706, South Korea;3. Department of Civil and Environmental Engineering, University of Illinois, Urbana, IL, USA;4. Construction Engineering Research Laboratory, U.S. Army Engineer Research and Development Center (ERDC-CERL), Champaign, IL, USA |
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| Abstract: | Non-centrosymmetric Langmuir–Blodgett (LB) thin films exhibit a temperature-dependent electric polarisation, which is known as the pyroelectric effect. Alternate layer LB films were prepared by transferring polysiloxane alternately with eicosylamine from a subphase of Millipore water (18 MΩ cm− 1) incorporating different metallic ions onto a 50 nm thick thermally evaporated aluminium substrate. Pyroelectric and dielectric measurements were performed on LB films with a sandwich structure comprising film. Pyroelectric coefficients of these LB films are measured at several temperatures. The dielectric constant and dielectric losses were obtained to determine the pyroelectric figure of merit values of these LB films, which were calculated in the range of 24.9 to 56.7 μC m− 2 K− 1. |
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