Multichannel Flexible Pulse Perception Array for Intelligent Disease Diagnosis System

TZ Liu and GY Gou and FP Gao and P Yao and HY Wu and YS Guo and MH Yin and J Yang and TC Wen and M Zhao and T Li and G Chen and JH Sun and TJ Ma and JQ Cheng and ZM Qi and JM Chen and JB Wang and MD Han and Z Fang and YY Gao and CX Liu and N Xue, ACS NANO, 17, 5673-5685 (2023).

DOI: 10.1021/acsnano.2c11897

Pressure sensors with high sensitivity, a wide linear range, and a quick response time are critical for building an intelligent disease diagnosis system that directly detects and recognizes pulse signals for medical and health applications. However, conventional pressure sensors have limited sensitivity and nonideal response ranges. We proposed a multichannel flexible pulse perception array based on polyimide/multiwalled carbon nanotube- polydimethylsiloxane nanocomposite/polyimide (PI/MPN/PI) sandwich-structure pressure sensor that can be applied for remote disease diagnosis. Furthermore, we established a mechanical model at the molecular level and guided the preparation of MPN. At the structural level, we achieved high sensitivity (35.02 kPa-1) and a broad response range (0-18 kPa) based on a pyramid-like bilayer microstructure with different upper and lower surfaces. A 27-channel (3 x 9) high-density sensor array was integrated at the device level, which can extract the spatial and temporal distribution information on a pulse. Furthermore, two intelligent algorithms were developed for extracting six-dimensional pulse information and automatic pulse recognition (the recognition rate reaches 97.8%). The results indicate that intelligent disease diagnosis systems have great potential applications in wearable healthcare devices.

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