Triboelectrification-enabled touch sensing for self-powered position mapping and dynamic tracking by a flexible and area-scalable sensor array

et al. 2018

Adv Funct Materials

Self Cite

135

With the arrival of intelligent terminals, tactile sensors which are capable of sensing various external physical stimuli are considered among the most vital devices for the next generation of smart electronics. To create a self-powered tactile sensor system that can function sustainably and continuously without an external power source is of crucial significance. An overview of the development in self-powered tactile sensor array system based on the triboelectric effect is systematically presented. The combination of multi-functionalization and high performance of tactile sensors aimed at achieving highly comprehensive performance is presented. For the tactile sensor unit, a development is summarized based on the two primary modes which are vertical contact-separation and single-electrode. For the pressure mapping array, the resolution is significantly enhanced by the novel cross-type configuration based on the single-electrode mode. Integrated with other mechanisms, the performance will be further elevated by broadening of the detect range and realizing of visualization of pressure imaging. Then, two main applications of human-machine interaction (HMI) and trajectory monitoring are comprehensively summarized. Finally, the future perspectives of selfpowered tactile sensor system based on triboelectric effect are discussed.

Section: Basic Mechanism and Device Designmentioning

confidence: 99%

Section: Basic Mechanism and Device Designmentioning

confidence: 99%

Self‐Powered Tactile Sensor Array Systems Based on the Triboelectric Effect

Tao

Bao

et al. 2018

Adv Funct Materials

Self Cite

135

“…In addition, another issue generally associated with triboelectric-type sensor arrays is the crosstalk between sensor units as well as the electrodes 41,42 , arising from electrostatic induction, which significantly limits their practical application for precise position identification in response to contacting objects. Thus, great efforts have been devoted to reducing this useless crosstalk, such as introducing a dielectric shielding layer 32,43,44 or metal screening layer 45 . Nevertheless, more involved layers not only complicate the fabrication process but also may compromise the stretchability/flexibility of the device due to mismatch of the elastic modulus of different layers.…”

Section: Introductionmentioning

confidence: 99%

A metal-electrode-free, fully integrated, soft triboelectric sensor array for self-powered tactile sensing

Liu

et al. 2020

Microsyst Nanoeng

The dramatic advances in flexible/wearable electronics have garnered great attention for touch sensors for practical applications in human health monitoring and human-machine interfaces. Self-powered triboelectric tactile sensors with high sensitivity, reduced crosstalk, and simple processing routes are highly desirable. Herein, we introduce a facile and low-cost fabrication approach for a metal-electrode free, fully integrated, flexible, and self-powered triboelectric tactile sensor array with 8-by-8 sensor units. Through the height difference between the sensor units and interconnect electrodes, the crosstalk derived from the electrodes has been successfully suppressed with no additional shielding layers. The tactile sensor array shows a remarkable sensitivity of 0.063 V kPa-1 with a linear range from 5 to 50 kPa, which covers a broad range of testing objects. Furthermore, due to the advanced mechanical design, the flexible sensor array exhibits great capability of pressure sensing even under a curved state. The voltage responses from the pattern mapping by finger touching demonstrate the uniformity of the sensor array. Finally, real-time tactile sensing associated with light-emitting diode (LED) array lighting demonstrates the potential application of the sensor array in position tracking, self-powered touch screens, human-machine interfaces and many others.

“…Among the various approaches toward this goal of HMIs, the triboelectric nanogenerator (TENG) and tribotronics have emerged as promising alternatives in recent years. The TENG, based on the coupling of contact electrification and electrostatic induction, was invented by Wang and co‐workers .…”

Section: Introductionmentioning

confidence: 99%

Human–Machine Interfacing Enabled by Triboelectric Nanogenerators and Tribotronics

Ding

Adv Materials Technologies

et al. 2018

Self Cite

181

Nowadays, the ubiquitously deployed intelligent devices (computers, machines, sensors, and so on) have brought huge convenience to people's daily life and are also changing the way of human life. To utilize such devices has already become an essential skill for humans, without which we cannot work, sense, communicate, or even entertain. To efficiently use them, more and more interactions are required in most applications and hence the effective communication between the human With the advances of artificial intelligence (AI), autonomous robotics, virtual reality (VR) and Internet of things (IoT), an intelligent and ubiquitous humanmachine interfacing (HMI) ecosystem has become a desire and attracted lots of interests. Triboelectric nanogenerators (TENG), as a natural and effective mechanical-to-electrical signal conversion technology, have been successfully utilized to realize many types of HMI, including smart keyboards, body motion sensors, the electronic skin, voice sensors, the triboelectrification-induced electroluminescence, and the artificial muscle. Meanwhile, tribotronics, as the coupling field of TENG and semiconductors, has demonstrated the feasibility for tactile switch or sensing with the possibilities of high integration and large scale. The fundamental theory of TENG and tribotronics is revisited herein. In addition, the definition of HMI and, for the first time, the research progress of the TENG and tribotronics enabled HMI are systematically and thoroughly reviewed. Finally, the perspectives in this emerging field are also discussed.