Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection

Pressure sensitivity and wide range are two crucial features of flexible electromechanical sensors for applications in the next‐generation of intelligent electronics, such as wearable healthcare monitors and soft human–machine interfaces. Conventional pressure sensors have a narrow pressure range (&...

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Autores principales:	Jing Li, Tianyu Wu, Huan Jiang, Yanyu Chen, Qibiao Yang
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	hierarchical structures piezoresistive sensors pressure sensitivity Computer engineering. Computer hardware TK7885-7895 Control engineering systems. Automatic machinery (General) TJ212-225
Acceso en línea:	https://doaj.org/article/f4fc64933cf64a6eb9f3c1eda1ba75d5
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id	oai:doaj.org-article:f4fc64933cf64a6eb9f3c1eda1ba75d5
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spelling	oai:doaj.org-article:f4fc64933cf64a6eb9f3c1eda1ba75d52021-11-23T07:58:49ZUltrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection2640-456710.1002/aisy.202100070https://doaj.org/article/f4fc64933cf64a6eb9f3c1eda1ba75d52021-11-01T00:00:00Zhttps://doi.org/10.1002/aisy.202100070https://doaj.org/toc/2640-4567Pressure sensitivity and wide range are two crucial features of flexible electromechanical sensors for applications in the next‐generation of intelligent electronics, such as wearable healthcare monitors and soft human–machine interfaces. Conventional pressure sensors have a narrow pressure range (<10 kPa) and complex fabrication processes, which significantly hinder their extensive applications. A facile laser‐engraving method is proposed to fabricate a flexible multiwalled‐carbon‐nanotube (MWCNTs)/poly(dimethylsiloxane) (PDMS) composite‐based piezoresistive sensor with hierarchical microstructures. Herein, the nonstandard‐circular feature and Gaussian distributed facula of a laser spot are utilized to produce the middle‐level porous microdome upon the bottom‐level cylinder microcolumn array, while the top‐level tentacle‐like conical micropillars are produced by vertically rotating the acrylic mold during the laser engraving process. This novel hierarchical microstructure endows the proposed piezoresistive sensor with orders‐of‐magnitude of higher sensitivity (≈35.51 kPa−1) than that of other reported electromechanical sensors and a more extensive pressure sensing range up to 23 kPa. Moreover, the detection limit of the sensor is down to 2 Pa, which makes it a desirable candidate for monitoring subtle pressure. The sensor is successfully applied to distinguish the syllables of each pronounced word, detect movements of the human wrist, and monitor radial arterial pulse, thus demonstrating its promising applications in wearable electronics.Jing LiTianyu WuHuan JiangYanyu ChenQibiao YangWileyarticlehierarchical structurespiezoresistive sensorspressure sensitivityComputer engineering. Computer hardwareTK7885-7895Control engineering systems. Automatic machinery (General)TJ212-225ENAdvanced Intelligent Systems, Vol 3, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hierarchical structures piezoresistive sensors pressure sensitivity Computer engineering. Computer hardware TK7885-7895 Control engineering systems. Automatic machinery (General) TJ212-225
spellingShingle	hierarchical structures piezoresistive sensors pressure sensitivity Computer engineering. Computer hardware TK7885-7895 Control engineering systems. Automatic machinery (General) TJ212-225 Jing Li Tianyu Wu Huan Jiang Yanyu Chen Qibiao Yang Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection
description	Pressure sensitivity and wide range are two crucial features of flexible electromechanical sensors for applications in the next‐generation of intelligent electronics, such as wearable healthcare monitors and soft human–machine interfaces. Conventional pressure sensors have a narrow pressure range (<10 kPa) and complex fabrication processes, which significantly hinder their extensive applications. A facile laser‐engraving method is proposed to fabricate a flexible multiwalled‐carbon‐nanotube (MWCNTs)/poly(dimethylsiloxane) (PDMS) composite‐based piezoresistive sensor with hierarchical microstructures. Herein, the nonstandard‐circular feature and Gaussian distributed facula of a laser spot are utilized to produce the middle‐level porous microdome upon the bottom‐level cylinder microcolumn array, while the top‐level tentacle‐like conical micropillars are produced by vertically rotating the acrylic mold during the laser engraving process. This novel hierarchical microstructure endows the proposed piezoresistive sensor with orders‐of‐magnitude of higher sensitivity (≈35.51 kPa−1) than that of other reported electromechanical sensors and a more extensive pressure sensing range up to 23 kPa. Moreover, the detection limit of the sensor is down to 2 Pa, which makes it a desirable candidate for monitoring subtle pressure. The sensor is successfully applied to distinguish the syllables of each pronounced word, detect movements of the human wrist, and monitor radial arterial pulse, thus demonstrating its promising applications in wearable electronics.
format	article
author	Jing Li Tianyu Wu Huan Jiang Yanyu Chen Qibiao Yang
author_facet	Jing Li Tianyu Wu Huan Jiang Yanyu Chen Qibiao Yang
author_sort	Jing Li
title	Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection
title_short	Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection
title_full	Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection
title_fullStr	Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection
title_full_unstemmed	Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection
title_sort	ultrasensitive hierarchical piezoresistive pressure sensor for wide‐range pressure detection
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/f4fc64933cf64a6eb9f3c1eda1ba75d5
work_keys_str_mv	AT jingli ultrasensitivehierarchicalpiezoresistivepressuresensorforwiderangepressuredetection AT tianyuwu ultrasensitivehierarchicalpiezoresistivepressuresensorforwiderangepressuredetection AT huanjiang ultrasensitivehierarchicalpiezoresistivepressuresensorforwiderangepressuredetection AT yanyuchen ultrasensitivehierarchicalpiezoresistivepressuresensorforwiderangepressuredetection AT qibiaoyang ultrasensitivehierarchicalpiezoresistivepressuresensorforwiderangepressuredetection
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Ultrasensitive Hierarchical Piezoresistive Pressure Sensor for Wide‐Range Pressure Detection

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