Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene
As a new material, graphene shows excellent properties in mechanics, electricity, optics, and so on, which makes it widely concerned by people. At present, it is difficult for graphene pressure sensor to meet both high sensitivity and large pressure detection range at the same time. Therefore, it is...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/1/289 |
| _version_ | 1797542393744982016 |
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| author | Lixia Cheng Renxin Wang Xiaojian Hao Guochang Liu |
| author_facet | Lixia Cheng Renxin Wang Xiaojian Hao Guochang Liu |
| author_sort | Lixia Cheng |
| collection | DOAJ |
| description | As a new material, graphene shows excellent properties in mechanics, electricity, optics, and so on, which makes it widely concerned by people. At present, it is difficult for graphene pressure sensor to meet both high sensitivity and large pressure detection range at the same time. Therefore, it is highly desirable to produce flexible pressure sensors with sufficient sensitivity in a wide working range and with simple process. Herein, a relatively high flexible pressure sensor based on piezoresistivity is presented by combining the conical microstructure polydimethylsiloxane (PDMS) with bilayer graphene together. The piezoresistive material (bilayer graphene) attached to the flexible substrate can convert the local deformation caused by the vertical force into the change of resistance. Results show that the pressure sensor based on conical microstructure PDMS-bilayer graphene can operate at a pressure range of 20 kPa while maintaining a sensitivity of 0.122 ± 0.002 kPa<sup>−1</sup> (0–5 kPa) and 0.077 ± 0.002 kPa<sup>−1</sup> (5–20 kPa), respectively. The response time of the sensor is about 70 ms. In addition to the high sensitivity of the pressure sensor, it also has excellent reproducibility at different pressure and temperature. The pressure sensor based on conical microstructure PDMS-bilayer graphene can sense the motion of joint well when the index finger is bent, which makes it possible to be applied in electronic skin, flexible electronic devices, and other fields. |
| first_indexed | 2024-03-10T13:29:58Z |
| format | Article |
| id | doaj.art-64982017549a49e5829d2f8e89ef4cf9 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T13:29:58Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-64982017549a49e5829d2f8e89ef4cf92023-11-21T08:05:30ZengMDPI AGSensors1424-82202021-01-0121128910.3390/s21010289Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer GrapheneLixia Cheng0Renxin Wang1Xiaojian Hao2Guochang Liu3State Key Laboratory of Dynamic Testing Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Dynamic Testing Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Dynamic Testing Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Dynamic Testing Technology, North University of China, Taiyuan 030051, ChinaAs a new material, graphene shows excellent properties in mechanics, electricity, optics, and so on, which makes it widely concerned by people. At present, it is difficult for graphene pressure sensor to meet both high sensitivity and large pressure detection range at the same time. Therefore, it is highly desirable to produce flexible pressure sensors with sufficient sensitivity in a wide working range and with simple process. Herein, a relatively high flexible pressure sensor based on piezoresistivity is presented by combining the conical microstructure polydimethylsiloxane (PDMS) with bilayer graphene together. The piezoresistive material (bilayer graphene) attached to the flexible substrate can convert the local deformation caused by the vertical force into the change of resistance. Results show that the pressure sensor based on conical microstructure PDMS-bilayer graphene can operate at a pressure range of 20 kPa while maintaining a sensitivity of 0.122 ± 0.002 kPa<sup>−1</sup> (0–5 kPa) and 0.077 ± 0.002 kPa<sup>−1</sup> (5–20 kPa), respectively. The response time of the sensor is about 70 ms. In addition to the high sensitivity of the pressure sensor, it also has excellent reproducibility at different pressure and temperature. The pressure sensor based on conical microstructure PDMS-bilayer graphene can sense the motion of joint well when the index finger is bent, which makes it possible to be applied in electronic skin, flexible electronic devices, and other fields.https://www.mdpi.com/1424-8220/21/1/289conical microstructurePDMSbilayer grapheneflexible pressure sensor |
| spellingShingle | Lixia Cheng Renxin Wang Xiaojian Hao Guochang Liu Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene Sensors conical microstructure PDMS bilayer graphene flexible pressure sensor |
| title | Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene |
| title_full | Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene |
| title_fullStr | Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene |
| title_full_unstemmed | Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene |
| title_short | Design of Flexible Pressure Sensor Based on Conical Microstructure PDMS-Bilayer Graphene |
| title_sort | design of flexible pressure sensor based on conical microstructure pdms bilayer graphene |
| topic | conical microstructure PDMS bilayer graphene flexible pressure sensor |
| url | https://www.mdpi.com/1424-8220/21/1/289 |
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