Porous dielectric elastomer based ultra-sensitive capacitive pressure sensor and its application to wearable sensing device

In this paper, we report a wearable and flexible capacitive pressure sensor based on porous dielectric elastomer with ultra-high sensitivity and stability. The capacitance response to a wide pressure range of 0~130kPa was investigated, which is generally considered as a human tactile pressure regime. The porous dielectric layer based pressure sensor showed highly sensitive and stable performance with pore-closing mechanism over the whole tactile pressure regime without any drift or structural instability. Finally, we demonstrated a bandage-type wearable pressure sensor for real-time monitoring of human wrist pulse.

[1]  Takao Someya,et al.  A large-area, flexible pressure sensor matrix with organic field-effect transistors for artificial skin applications. , 2004, Proceedings of the National Academy of Sciences of the United States of America.

[2]  Benjamin C. K. Tee,et al.  Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers. , 2010, Nature materials.

[3]  T. Someya,et al.  Flexible organic transistors and circuits with extreme bending stability. , 2010, Nature materials.

[4]  J. Rogers,et al.  Materials for multifunctional balloon catheters with capabilities in cardiac electrophysiological mapping and ablation therapy. , 2011, Nature materials.

[5]  Benjamin C. K. Tee,et al.  Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes. , 2011, Nature nanotechnology.

[6]  Sung-Jin Choi,et al.  A polydimethylsiloxane (PDMS) sponge for the selective absorption of oil from water. , 2011, ACS applied materials & interfaces.

[7]  Zhong Lin Wang,et al.  Nanotechnology-enabled energy harvesting for self-powered micro-/nanosystems. , 2012, Angewandte Chemie.

[8]  Zhong Lin Wang,et al.  Transparent triboelectric nanogenerators and self-powered pressure sensors based on micropatterned plastic films. , 2012, Nano letters.

[9]  Sung-hoon Ahn,et al.  A flexible and highly sensitive strain-gauge sensor using reversible interlocking of nanofibres. , 2012, Nature materials.

[10]  Moon Kyu Kwak,et al.  Enhanced Skin Adhesive Patch with Modulus‐Tunable Composite Micropillars , 2013, Advanced healthcare materials.

[11]  Changhyun Pang,et al.  Recent advances in flexible sensors for wearable and implantable devices , 2013 .

[12]  C. Keplinger,et al.  25th Anniversary Article: A Soft Future: From Robots and Sensor Skin to Energy Harvesters , 2013, Advanced materials.

[13]  B. Shirinzadeh,et al.  A wearable and highly sensitive pressure sensor with ultrathin gold nanowires , 2014, Nature Communications.

[14]  Xuewen Wang,et al.  Silk‐Molded Flexible, Ultrasensitive, and Highly Stable Electronic Skin for Monitoring Human Physiological Signals , 2014, Advanced materials.

[15]  Ting Zhang,et al.  Electronic Skin: Silk‐Molded Flexible, Ultrasensitive, and Highly Stable Electronic Skin for Monitoring Human Physiological Signals (Adv. Mater. 9/2014) , 2014 .

[16]  Guang Zhu,et al.  Self-powered, ultrasensitive, flexible tactile sensors based on contact electrification. , 2014, Nano letters.