Chang, Hochan Kim, Sungwoong Jin, Sumin Lee, Seung-Woo Yang, Gil-Tae Lee, Ki-Young Yi, Hyunjung 2024-01-19T23:33:15Z 2024-01-19T23:33:15Z 2021-09-03 2018-01-10 1944-8244 https://pubs.kist.re.kr/handle/201004/121811 Flexible piezoresistive sensors have huge potential for health monitoring, human-machine interfaces, prosthetic limbs, and intelligent robotics. A variety of nanomaterials and structural schemes have been proposed for realizing ultrasensitive flexible piezoresistive sensors. However, despite the success of recent efforts, high sensitivity within narrower pressure ranges and/or the challenging adhesion and stability issues still potentially limit their broad applications. Herein, we introduce a biomaterial-based scheme for the development of flexible pressure sensors that are ultrasensitive (resistance change by 5 orders) over a broad pressure range of 0.1-100 kPa, promptly responsive (20 ms), and yet highly stable. We show that employing biomaterial-incorporated conductive networks of single-walled carbon nanotubes as interfacial layers of contact-based resistive pressure sensors significantly enhances piezoresistive response via effective modulation of the interlayer resistance and provides stable interfaces for the pressure sensors. The developed flexible sensor is capable of real-time monitoring of wrist pulse waves under external medium pressure levels and providing pressure profiles applied by a thumb and a forefinger during object manipulation at a low voltage (1 V) and power consumption (<12 mu W). This work provides a new insight into the material candidates and approaches for the development of wearable health-monitoring and human-machine interfaces. English American Chemical Society ELECTRONIC SKIN CONDUCTIVE NANOMESH CARBON NANOTUBES STRAIN SENSORS TRANSPARENT PEPTIDES MATRIX ARRAYS TRANSISTORS RUBBER Ultrasensitive and Highly Stable Resistive Pressure Sensors with Biomaterial-Incorporated Interfacial Layers for Wearable Health-Monitoring and Human-Machine Interfaces Article 10.1021/acsami.7b14048 1 ACS Applied Materials & Interfaces, v.10, no.1, pp.1067 - 1076 ACS Applied Materials & Interfaces 10 1 1067 1076 scie scopus 000422814400115 2-s2.0-85040351035 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article ELECTRONIC SKIN CONDUCTIVE NANOMESH CARBON NANOTUBES STRAIN SENSORS TRANSPARENT PEPTIDES MATRIX ARRAYS TRANSISTORS RUBBER piezoresistivity biomaterials carbon nanotubes health monitoring human machine interfaces