Flexible Broad‐Range Pressure Sensors Enabled by Deformation‐Induced Conductive Channels in 3D Graphene Foam@Polydimethylsiloxane Composite for Precise Vibrational Signal Detection,Chinese Journal of Chemistry

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Flexible Broad‐Range Pressure Sensors Enabled by Deformation‐Induced Conductive Channels in 3D Graphene Foam@Polydimethylsiloxane Composite for Precise Vibrational Signal Detection
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2020-03-11 , DOI: 10.1002/cjoc.201900538
Jiankun Miao _{1,

2} , Yayuan Shi ₂ , Hongfei Zhu ₂ , Minyi Gao ₁

Affiliation

Here we report the design and fabrication of high‐performance pressure sensors based on three‐ dimensional (3D) graphene foam filled polydimethylsiloxane (GF@PDMS) composite with a broad sensing range spaning from 0.05 kPa to 130 kPa. The interpretation of device functioning mechanism can be classified into low and high pressure sensing regions. In the low pressure region (<15 kPa), the pressure loading leads to the temporal connection of micro‐cracks in GF scaffold and forming conductive channels. In the high pressure region (15 kPa to 130 kPa), the pressure induced deformation of GF results in the better connections among micro‐cracks and the shortening of conductive pathway to further decrease the electrical resistance. The GF@PDMS sensors exhibited accuracy, sensibility and reproducibility to detect pressure signals with remarkable stability for over 16000 loading‐unloading cycles, indicating its great potential for practical applications. Moreover, the GF@PDMS sensors also showed high performances in the detection of dynamic pressures, such as subtle mechanical vibration signals, as well as physiology vibrational signals generated by human throats. We expect this technology could be integrated into different sensing systems for the applications in wearable smart electronics and human‐machine communications.

中文翻译：

由3D石墨烯泡沫@聚二甲基硅氧烷复合材料中的变形感应导电通道实现的灵活的宽范围压力传感器，可精确检测振动信号

在这里，我们报告了基于三维（3D）石墨烯泡沫填充的聚二甲基硅氧烷（GF @ PDMS）复合材料的高性能压力传感器的设计和制造，该传感器的传感范围范围从0.05 kPa至130 kPa。设备功能机制的解释可以分为低压和高压感应区域。在低压区域（<15 kPa），压力负载会导致GF支架中的微裂纹暂时连接并形成导电通道。在高压区域（15 kPa至130 kPa），GF的压力诱导变形导致微裂纹之间的连接更好，导电路径缩短，从而进一步降低了电阻。GF @ PDMS传感器表现出准确性，在超过16000次装卸循环中，以极高的稳定性检测压力信号的灵敏度和可重复性，表明其在实际应用中具有巨大的潜力。此外，GF @ PDMS传感器在动态压力检测方面也表现出很高的性能，例如微妙的机械振动信号以及人喉咙产生的生理振动信号。我们希望这项技术可以集成到不同的传感系统中，以用于可穿戴智能电子设备和人机通信。以及人类喉咙产生的生理振动信号。我们希望这项技术可以集成到不同的传感系统中，以用于可穿戴智能电子设备和人机通信。以及人类喉咙产生的生理振动信号。我们希望这项技术可以集成到不同的传感系统中，以用于可穿戴智能电子设备和人机通信。

更新日期：2020-03-11

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