Nanomechanical and electrical characterization of a new cellular electret sensor–actuator
Windmill, J.F.C. and Zorab, A. and Bedwell, D. and Robert, D. (2008) Nanomechanical and electrical characterization of a new cellular electret sensor–actuator. Nanotechnology, 19 (3). 035506. ISSN 0957-4484 (https://doi.org/10.1088/0957-4484/19/03/035506)
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Electrically charged cellular polymers are known to display pseudo-piezoelectric effects that endow them with interesting mechano-electrical characteristics. When a film of such a polymer is compressed, charge is generated across its thickness, and conversely, applying an oscillatory or static potential elicits mechanical motions. This dual sensor-actuator behaviour can be embedded in one material and presents distinct advantages of functional integration. A novel electroactive foam is presented here that embeds such a sensor-actuator function. The foam has a sensitivity constant (d33) of 330 pC N−1. Interestingly, the resonant behaviour of the cellular film can be altered by variation in the DC offset across the material. Such adaptive capacity could be of great advantage for tuning polymer-based mechanical devices to be either efficient sound radiators and mechanical actuators, or sensitive and coherent sensors. Possible applications in microfluidics are also discussed.
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Item type: Article ID code: 12826 Dates: DateEvent23 January 2008PublishedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Strathprints Administrator Date deposited: 05 Jul 2010 13:28 Last modified: 09 Aug 2024 02:26 URI: https://strathprints.strath.ac.uk/id/eprint/12826