Hydrogen-Bond-Triggered Hybrid Nanofibrous Membrane-Based Wearable Pressure Sensor with Ultrahigh Sensitivity over a Broad Pressure Range

被引：204

作者：

Sharma, Sudeep ^{[1
]}

Chhetry, Ashok ^{[1
]}

Zhang, Shipeng ^{[1
]}

Yoon, Hyosang ^{[1
]}

Park, Chani ^{[1
]}

Kim, Hyunsik ^{[1
]}

Sharifuzzaman, Md ^{[1
]}

Hui, Xue ^{[1
]}

Park, Jae Yeong ^{[1
]}

机构：

[1] Kwangwoon Univ, Dept Elect Engn, Seoul 01897, South Korea

来源：

ACS NANO | 2021年 / 15卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

MXene; lithium sulfonamides; ionic nanofibrous membrane; capacitive pressure sensor; e-skin; wearable medical device;

D O I：

10.1021/acsnano.0c07847

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Recently, flexible capacitive pressure sensors have received significant attention in the field of wearable electronics. The high sensitivity over a wide linear range combined with long-term durability is a critical requirement for the fabrication of reliable pressure sensors for versatile applications. Herein, we propose a special approach to enhance the sensitivity and linearity range of a capacitive pressure sensor by fabricating a hybrid ionic nanofibrous membrane as a sensing layer composed of Ti3C2Tx MXene and an ionic salt of lithium sulfonamides in a poly(vinyl alcohol) elastomer matrix. The reversible ion pumping triggered by a hydrogen bond in the hybrid sensing layer leads to high sensitivities of 5.5 and 1.5 kPa(-1) in the wide linear ranges of 0-30 and 30-250 kPa, respectively, and a fast response time of 70.4 ms. In addition, the fabricated sensor exhibits a minimum detection limit of 2 Pa and high durability over 20 000 continuous cycles even under a high pressure of 45 kPa. These results indicate that the proposed sensor can be potentially used in mobile medical monitoring devices and next-generation artificial e-skin.

引用

页码：4380 / 4393

页数：14