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Langmuir-Blodgett films: a new class of pyroelectric materials
- Source :
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 35(6)
- Publication Year :
- 1988
-
Abstract
- The authors report on a novel method for producing the noncentrosymmetric structures necessary for the observation of the pyroelectric effect. The Langmuir-Blodgett technique has been used to fabricate ultrathin films consisting of alternate layers of 22-tricosenoic acid and 1-docosylamine. The pyroelectric coefficient has been determined using both static and dynamic detection techniques, is approximately 0.2 nC cm/sup -2/ K/sup -1/ (static value); this value is independent of the film thickness in the range of 11 to 99 monolayers, but increases slightly if a substrate of lower thermal expansion coefficient is used. The results indicate that there is a piezoelectrically induced secondary effect contributing to the overall pyroelectric activity. >
Details
- ISSN :
- 08853010
- Volume :
- 35
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control
- Accession number :
- edsair.doi.dedup.....662a909d8e0d4afae943ea3965786faa