Ultra-Sensitive Strain Sensor Based on Flexible Poly(vinylidene fluoride) Piezoelectric Film
| Autor: | Si-Yi Liu, Tianxun Gong, Junxiong Guo, Xiongbang Wei, Kai Lu, Bing-Wei Lu, Wen Huang, Bin Yu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Capacitive sensing Piezoelectricity Nanochemistry 02 engineering and technology Tactile pressure 01 natural sciences Interference (communication) Sensor array 0103 physical sciences lcsh:TA401-492 General Materials Science 010302 applied physics business.industry Nano Idea 021001 nanoscience & nanotechnology Condensed Matter Physics Piezoresponse force microscopy Electrode Optoelectronics Flexible sensor lcsh:Materials of engineering and construction. Mechanics of materials PVDF film 0210 nano-technology business Voltage |
| Zdroj: | Nanoscale Research Letters, Vol 13, Iss 1, Pp 1-6 (2018) Nanoscale Research Letters |
| ISSN: | 1556-276X 1931-7573 |
| DOI: | 10.1186/s11671-018-2492-7 |
| Popis: | A flexible 4 × 4 sensor array with 16 micro-scale capacitive units has been demonstrated based on flexible piezoelectric poly(vinylidene fluoride) (PVDF) film. The piezoelectricity and surface morphology of the PVDF were examined by optical imaging and piezoresponse force microscopy (PFM). The PFM shows phase contrast, indicating clear interface between the PVDF and electrode. The electro-mechanical properties show that the sensor exhibits excellent output response and an ultra-high signal-to-noise ratio. The output voltage and the applied pressure possess linear relationship with a slope of 12 mV/kPa. The hold-and-release output characteristics recover in less than 2.5 μs, demonstrating outstanding electro-mechanical response. Additionally, signal interference between the adjacent arrays has been investigated via theoretical simulation. The results show the interference reduces with decreasing pressure at a rate of 0.028 mV/kPa, highly scalable with electrode size and becoming insignificant for pressure level under 178 kPa. |
| Databáze: | OpenAIRE |
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