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- W2011126210 abstract "Abstract The pyroelectric effect in alternate layer LB superlattices incorporating interacting lamellae of carboxyl and amino moieties has been investigated. Three distinct systems have been studied, namely (a) a copolysiloxane carboxylic acid/aliphatic amine alternate multilayer, (b) a calix[8]arene carboxylic acid/calix[8]arene amine alternate multilayer, and (c) a hybrid system consisting of a copolysiloxane carboxylic acid/calix[8]arene amine multilayer. In all superlattices there occurs proton transfer between acid and amine moieties leading to a temperature-dependent electric polarisation which is reinforced by added contributions from dipolar reorientation effects. This paper describes how the pyroelectric coefficient can be enhanced by utilising a hybrid alternate layer LB film superlattice containing a 50:50 copolysiloxane substituted with polar aromatic side-chains terminated with carboxyl groups, which is co-deposited with a calix[8]arene molecular basket substituted with primary amine groups. The pyroelectric activity of the copolysiloxane acid/calix[8]arene amine system is substantially higher and stable over a wider temperature range than either of the other two superlattices, giving a pyroelectric coefficient of 10.2 μC m −2 K −1 at 25°C." @default.
- W2011126210 created "2016-06-24" @default.
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- W2011126210 date "1999-12-01" @default.
- W2011126210 modified "2023-09-22" @default.
- W2011126210 title "Pyroelectric superlattices based on copolysiloxane/calix[8]arene alternate layer LB films" @default.
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- W2011126210 doi "https://doi.org/10.1016/s0928-4931(99)00039-9" @default.
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