Langmuir-Blodgett film pyroelectric heat sensors

Author

Richardson, T. ; Majid, W. H Abd ; Capan, R. ; Lacey, D. ; Holder, S.

Author_Institution

Dept. of Phys., Sheffield Univ., UK

fYear

1994

fDate

6-6 April 1994

Firstpage

42461

Lastpage

42467

Abstract

Copolysiloxane-eicosylamine polar molecular assemblies, built up using-the alternate layer Langmuir-Blodgett (LB) film deposition technique, have been shown to possess very high quasi-static pyroelectric coefficients compared to other LB film systems. Indeed, values around 10 mu Cm/sup -2/ K/sup -1/ at 303 K represent a level of activity which is nearly 30% of that exhibited by commercially available polyvinylidenedifluoride (PVF/sub 2/) pyroelectric heat sensors. Data are presented in this paper to demonstrate the reproducibility of the pyroelectric response and its temperature dependence. Furthermore, preliminary studies of the dielectric behaviour of these polar films have shown that the low frequency (<500 Hz) dielectric loss is about 0.01 but a dielectric relaxation occurs at around 4 kHz.<>

Keywords

Langmuir-Blodgett films; dielectric losses; dielectric relaxation; dielectric thin films; pyroelectric detectors; pyroelectricity; 100 Hz to 100 kHz; 289 to 303 K; Langmuir-Blodgett film pyroelectric heat sensors; alternate layer Langmuir-Blodgett film deposition; copolysiloxane-eicosylamine polar molecular assemblies; dielectric behaviour; dielectric relaxation; low frequency dielectric loss; polar films; pyroelectric response reproducibility; quasistatic pyroelectric coefficients; temperature dependence; Dielectric films; Dielectric losses; Molecular electronics; Pyroelectric detectors; Pyroelectricity;

fLanguage

English

Publisher

iet

Conference_Titel

Molecular Electronic Devices, IEE Colloquium on

Conference_Location

London, UK

Type

conf

Filename

369850