Dielectric and pyroelectric properties of a new family of modified polypeptide films

Author

Damjanovic, D. ; Bhalla, A.S. ; Cross, L.E. ; Erhan, S. ; Reddy, A.

Author_Institution

Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA

fYear

1990

fDate

6-8 Jun 1990

Firstpage

658

Lastpage

661

Abstract

The dielectric and pyroelectric properties of gelatin-based synthetic polypeptides were studied for possible sensor applications. Among the compositions examined, gelatin films modified with triglycerol were found to have particularly interesting properties. The films exhibited a strong dispersion in the dielectric permittivity accompanied by a high dielectric loss near room temperature. The possible relaxational mechanisms responsible for the observed dielectric behavior are discussed. The pyroelectric properties of the films were investigated. The measurements performed on prepoled samples proved the presence of a true, reversible pyroelectric response in the films. The value of the pyroelectric coefficient of the films was found to be comparable to that of PVDF polymer

Keywords

dielectric losses; dielectric relaxation; dielectric thin films; gelatin; molecular biophysics; permittivity; polymer films; pyroelectricity; biological polymer; dielectric loss; dielectric permittivity; dielectric properties; dispersion; gelatin; polypeptide films; pyroelectric properties; relaxational mechanisms; sensor applications; triglycerol; Dielectric losses; Dielectric measurements; Performance evaluation; Piezoelectric devices; Piezoelectric effect; Piezoelectric films; Piezoelectricity; Polymer films; Pyroelectricity; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1990., IEEE 7th International Symposium on

Conference_Location

Urbana-Champaign, IL

Print_ISBN

0-7803-0190-0

Type

conf

DOI

10.1109/ISAF.1990.200341

Filename

200341