Graphene-Based Multifunctional Textile for Sensing and Actuating

Abstract

Textiles are materials that are extensively used in everyday life; textile-based sensors can, therefore, be regarded as ideal devices for a health monitor. However, previously reported textile sensors have limited prospects due to their single function or incompatibility. Traditional textile sensors generally focus on signal detection, which has not been able to be combined with an actuator to provide real-time health status feedback. Thus, to date, there are no well-established health monitoring systems based on intelligent textiles. Herein, we present a wearable batch-prepared graphene-based textile based on laser-scribing and thermal-transfer technology. Integrated with four functions of strain sensing, pressure sensing, physiological electrical sensing, and sound emitting, the GT is able to detect human body signals and transduce them to sound signals when the user is in an abnormal physical state. Moreover, the GT has high linearity for both strain and pressure sensing; the coefficients of determination exceed 99.3% and 98.2%, respectively. The performance of the device remains stable up to a pressure of 1000 kPa. The response time of the GT possession reaches as low as 85 ms at 4.2 Pa pressure. Therefore, due to their diversified functions and good performance, the research on GT is expected to extend to the fields of health monitoring, sports monitoring, and so forth.

Electrooculography and Tactile Perception Collaborative Interface for 3D Human–Machine Interaction

“…In addition, there are still challenges in the interconnection and protection of ultrathin bare GETs. , Consequently, it is of great significance to develop ultrathin, flexible, stretchable, and air permeable graphene electrodes with simple preparation. Laser-induced graphene, with its simple preparation, is widely used in wearable electronics, such as strain sensors, − microfluidic biosensors, , electromagnetic interference shields, , multifunctional textiles, , etc. The development of a special transfer process combined with a laser induction process is helpful to realize the ultrathin graphene electrode for EOG signal acquisition.…”

Bi2O2Se-Based True Random Number Generator for Security Applications

“…Thus, a secure transmission protocol is also necessary to further protect information safety. The secure data transmission in the IoT system often require random keys generation with security protocols to establish trusted communication channels, for example, the applications of wearable sensor networks or other intelligent applications running at the edge. , Harnessing hardware-based primitives into those software-based cryptography algorithms could be a more reliable option. In this scenario, a TRNG-based Diffie–Hellman Key Exchange protocol was demonstrated in the current study, which could solve this potential communication security problem.…”

Flexible Pressure Sensor Decorated with MXene and Reduced Graphene Oxide Composites for Motion Detection, Information Transmission, and Pressure Sensing Performance

“…Wang et al deposited an MXene sensing layer on the surface of spring-shaped spiral core sheath polyester yarn and used the capillary effect to prepare strain/humidity sensors, which can be used to detect various activities of the human body . Nevertheless, most of the fiber-based flexible pressure sensors reported so far are modified with a single material, and the sensitivity and sensing range still need to be improved. − The preparation of fiber-based wearable devices with fast response time, good stability, and friendly human–computer interaction via simple and low-cost fabrication methods still faces great challenges.…”