材料科学
聚二甲基硅氧烷
灵敏度(控制系统)
碳纳米管
多孔性
触觉传感器
压力传感器
复合数
纳米技术
复合材料
光电子学
电子工程
计算机科学
机器人
热力学
物理
工程类
人工智能
作者
Kyubin Bae,Minhyeong Kim,J.S. Kim,Sangjun Sim,Wondo Kim,Soonjae Pyo,Jongbaeg Kim
出处
期刊:Small
[Wiley]
日期:2022-08-15
卷期号:18 (39)
被引量:25
标识
DOI:10.1002/smll.202203193
摘要
Porous structures have been utilized in tactile sensors to improve sensitivity owing to their excellent deformability. Recently, tactile sensors using porous structures have been used in practical applications, such as bio-signal monitoring. However, highly sensitive responses are limited to the low-pressure range, and their sensitivity significantly decreases in a higher-pressure range. Several approaches for developing tactile sensors with high sensitivity overing a wide pressure range have been proposed; however, achieving high sensitivity and wide sensing range remains a crucial challenge. This report presents a carbon nanotube (CNT)-coated CNT-polydimethylsiloxane (PDMS) composite having dual-scale pores for tactile sensors with high sensitivity over a wide pressure range. The porous polymer frame formed with dense pores of dual sizes facilitates the closure of large and small pores at low and high pressures, respectively. This results in an apparent increase in the number of contact points between the CNT-CNT at the pores even under a wide pressure range. Furthermore, the piezoresistivity of the CNT-PDMS composite contributes to achieving a high sensitivity of the tactile sensor over a wide pressure range. Based on these mechanisms, various human movements over a broad pressure spectrum are monitored to investigate the practical usefulness of the sensor.
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