A Highly Stretchable Transparent Self‐Powered Triboelectric Tactile Sensor with Metallized Nanofibers for Wearable Electronics

Abstract

Recently, the quest for new highly stretchable transparent tactile sensors with large-scale integration and rapid response time continues to be a great impetus to research efforts to expand the promising applications in human-machine interactions, artificial electronic skins, and smart wearable equipment. Here, a self-powered, highly stretchable, and transparent triboelectric tactile sensor with patterned Ag-nanofiber electrodes for detecting and spatially mapping trajectory profiles is reported. The Ag-nanofiber electrodes demonstrate high transparency (>70%), low sheet resistance (1.68-11.1 Ω □ ), excellent stretchability, and stability (>100% strain). Based on the electrode patterning and device design, an 8 × 8 triboelectric sensor matrix is fabricated, which works well under high strain owing to the effect of the electrostatic induction. Using cross-locating technology, the device can execute more rapid tactile mapping, with a response time of 70 ms. In addition, the object being detected can be made from any commonly used materials or can even be human hands, indicating that this device has widespread potential in tactile sensing and touchpad technology applications.

Significance of Nanomaterials in Wearables: A Review on Wearable Actuators and Sensors

“…[150] In particular, these sensors fabricated by electrospun nanofiber films and fabric also achieved excellent piezoresistive response. [105,155] Recently, the emerging triboelectric-type pressure sensors have also received attention for their ability to produce output electrical power under pressure stimuli [156] (Figure 8i). www.advmat.de www.advancedsciencenews.com Capacitive pressure sensors have advantages of high sensitivity to detect static pressure and lower hysteresis.…”

“…For example, Figure 10a,b demonstrates an ultrasensitive sensor with pressure and temperature sensing, which employs the piezoresistive and thermoresistive effect of PANI hollow nanospheres and CNT active composite. [90] Apart from sensing external stimuli with high performance, the sensor can be combined with other features like self-healing, [166] selfpowering, [156] self-cleaning, [167] and biocompatibility, making it highly versatile and multifunctional. In another work, a self-powered multifunctional sensor was fabricated by employing rGO/PVDF nanofibers as both the sensing and energy storage elements, which integrated with pressure and gas sensor as well as photo detector to detect environmental conditions and human physiological signals (Figure 10d-f).…”

All‐Fiber Structured Electronic Skin with High Elasticity and Breathability

“…[11,12] Meanwhile, self-powered systems have tremendous prospects in the areas of remote and mobile sensors, portable personal electronics, and wireless health networks. [13,15,16] Recently, a pioneering concept of constructing pressure sensors based on contact electrification and electrostatic induction has proved to be a promising strategy to fabricate the self-powered electronic skin. [13,15,16] Recently, a pioneering concept of constructing pressure sensors based on contact electrification and electrostatic induction has proved to be a promising strategy to fabricate the self-powered electronic skin.…”

Self‐Powered Bio‐Inspired Spider‐Net‐Coding Interface Using Single‐Electrode Triboelectric Nanogenerator

“…[48][49][50][51][52][53][54][55][56] During the past few years, various triboelectric interfaces have been developed toward a wide range of detection and control applications. [60][61][62][63][64][65][66][67][68][69] For each of the motion control, individual sensing node is required as well as sensing electrodes. Pressing-type interface is normally realized by contact-separation mode-based pressure or tactile sensors, in order to detect the pressing on the interface for motion control.…”

“…[57][58][59] Categorized by the actuated motion performing on the interfaces, triboelectric interfaces mainly include pressing-type interfaces and sliding-type interfaces. [64] Another triboelectric interface in form of 3D tactile sensor is reported for intuitive control of object attitude in 3D manner (including both translation and rotation movement). [60][61][62][63][64][65][66][67][68][69] For each of the motion control, individual sensing node is required as well as sensing electrodes.…”