Direct piezoelectric responses of soft composite fiber mats
| Autor: | Jason Morvan, Ebru A. Buyuktanir, John L. West, John Harden, Michael Varga, Antal Jakli, Nicholas Diorio |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Applied Physics Letters. 102:153903 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4802593 |
| Popis: | Recently soft fiber mats electrospun from solutions of Barium Titanate (BT) ferroelectric ceramics particles and polylactic acid (PLA) were found to have large (d33 ∼ 1 nm/V) converse piezoelectric signals offering a myriad of applications ranging from active implants to smart textiles. Here, we report direct piezoelectric measurements (electric signals due to mechanical stress) of the BT/PLA composite fiber mats at several BT concentrations. A homemade testing apparatus provided AC stresses in the 50 Hz-1.5 kHz-frequency range. The piezoelectric constant d33 ∼ 0.5 nC/N and the compression modulus Y ∼ 104–105 Pa found are in agreement with the prior converse piezoelectric and compressibility measurements. Importantly, the direct piezoelectric signal is large enough to power a small LCD by simple finger tapping of a 0.15 mm thick 2-cm2 area mat. We propose using these mats in active Braille cells and in liquid crystal writing tablets. |
| Databáze: | OpenAIRE |
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