Scalable Batch Fabrication of Flexible, Transparent and Self-triggered Tactile Sensor Array Based on Triboelectric Effec
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Scalable Batch Fabrication of Flexible, Transparent and Self‑triggered Tactile Sensor Array Based on Triboelectric Effect Yoonsang Ra1 · Moonwoo La2 · Sumin Cho1 · Sung Jea Park2 · Dongwhi Choi1 Received: 30 May 2020 / Revised: 25 August 2020 / Accepted: 1 September 2020 © Korean Society for Precision Engineering 2020
Abstract In this study, a facile and scalable fabrication process of the flexible and transparent tactile sensor array where its operation is based on the triboelectric effect is proposed. The overall process is assisted by the solution based screen printing method, which is well-known as advantageous in the batch fabrication of the electronic devices. The introduction of the batch fabrication process to the tactile sensor array enables the realization of high functionality such as transparency and flexibility. The performance of the fabricated tactile sensor array is systematically investigated through the parametric studies and the discernibility to multiple external physical stimuli such as vertical contact and horizontal sliding is verified. It is confirmed that although the present self-triggered tactile sensor array could be easily fabricated and scaled-up without cumbersome processes, the functionalities such as sensitivity, resolution, transparency, flexibility and even peak power density, are comparable to previously developed tactile sensors. Consequently, the scalable and design-flexible fabrication methodology with cost-effect and high production speed in this study effectively broadens the applicability of the sensor array. As proofof-concept demonstration of potential applications, a stand-alone sensory lighting system as well as a wearable transparent code generator are developed and their performances are investigated. Keywords Triboelectric nanogenerator · Contact electrification · Tactile sensor array · Screen printing · Batch fabrication
1 Introduction The internet of things (IoT) has attracted great attention and expected to be an unavoidable and indispensable technology in the near future [1–3]. The human–machine interface Yoonsang Ra and Moonwoo La have contributed equally to this work. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s40684-020-00267-7) contains supplementary material, which is available to authorized users. * Sung Jea Park [email protected] * Dongwhi Choi [email protected] 1
Department of Mechanical Engineering, Kyung Hee University, 1732 Deogyeong‑daero, Yongin 17104, Gyeonggi, South Korea
School of Mechanical Engineering, Korea University of Technology and Education (KOREATECH), Cheonan 31253, Chungnam, South Korea
2
(HMI) that connects people with electronic devices is a crucial technology as a key player of the IoT along with the human–human interface (HHI) and machine to machine interface (MMI) for achieving the next generation of smart electronics such as personalized healthcare device, intelligent robot and electronic skin
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