Graded Interlocks for Iontronic Pressure Sensors with High Sensitivity and High Linearity over a Broad Range

Bai，Ningning1,2; Wang，Liu2; Xue，Yiheng3; Wang，Yan4; Hou，Xingyu2; Li，Gang2; Zhang，Yuan2; Cai，Minkun2; Zhao，Lingyu2; Guan，Fangyi2; Wei，Xueyong5; Guo，Chuan Fei2

2021

10.1021/acsnano.1c10535

ACS Nano   影响因子和分区

1936-0851

1936-086X

Flexible pressure sensors that have high sensitivity, high linearity, and a wide pressure-response range are highly desired in applications of robotic sensation and human health monitoring. The challenge comes from the incompressibility of soft materials and the stiffening of microstructures in the device interfaces that lead to gradually saturated response. Therefore, the signal is nonlinear and pressure-response range is limited. Here, we show an iontronic flexible pressure sensor that can achieve high sensitivity (49.1 kPa-1), linear response (R2 > 0.995) over a broad pressure range (up to 485 kPa) enabled by graded interlocks of an array of hemispheres with fine pillars in the ionic layer. The high linearity comes from the fact that the pillar deformation can compensate for the effect of structural stiffening. The response-relaxation time of the sensor is <5 ms, allowing the device to detect vibration signals with frequencies up to 200 Hz. Our sensor has been used to recognize objects with different weights based on machine learning during the gripper grasping tasks. This work provides a strategy to make flexible pressure sensors that have combined performances of high sensitivity, high linearity, and wide pressure-response range.

compressibility graded interlocks iontronic interface linearity pressure range

SCI ; EI

英语

NI期刊 ; ESI高被引 ; NI论文

通讯

National Natural Science Foundation of China[52073138] ; Science Technology and Innovation Committee of Shenzhen Municipality["JCYJ20170817111714314","JCYJ20210324120202007"] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Shenzhen Sci-Tech Fund[KYTDPT20181011104007] ; Guangdong Provincial Key Laboratory Program[2021B1212040001]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000780214300078

AMER CHEMICAL SOC

20221111784725

Pressure Measuring Instruments:944.3

2-s2.0-85126151621

Scopus

1.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin,150001,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Computer Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Department of Physics,Nanchang University,Nanchang,330031,China
5.State key Laboratory for Manufacturing Systems Engineering,Xi'an Jiaotong University,Xi'an,Shaanxi,710049,China

Bai，Ningning,Wang，Liu,Xue，Yiheng,et al. Graded Interlocks for Iontronic Pressure Sensors with High Sensitivity and High Linearity over a Broad Range[J]. ACS Nano,2021,16(3):4338-4347.

Bai，Ningning.,Wang，Liu.,Xue，Yiheng.,Wang，Yan.,Hou，Xingyu.,...&Guo，Chuan Fei.(2021).Graded Interlocks for Iontronic Pressure Sensors with High Sensitivity and High Linearity over a Broad Range.ACS Nano,16(3),4338-4347.

Bai，Ningning,et al."Graded Interlocks for Iontronic Pressure Sensors with High Sensitivity and High Linearity over a Broad Range".ACS Nano 16.3(2021):4338-4347.