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Poly-dimethylsiloxane (PDMS) 기판 위에 형성된 나노구조를 이용한 시각 인장센서의 개발
김건휘 ( Geon Hwee Kim ),우현수 ( Hyeonsu Woo ),임근배 ( Geunbae Lim ),안태창 ( Taechang An ) 한국센서학회 2018 센서학회지 Vol.27 No.6
Structural color has many advantages over pigment based color. In recent years, researches are being conducted to apply these advantages to applications such as wearable devices. In this study, strain sensor, a kind of wearable device, was developed using structural color. The use of structural color has the advantage of not using energy and complex measuring equipment to measure strain rate. Wrinkle structure was fabricated on the surface of Poly-dimethylsiloxane (PDMS) and used it as a sensor which color changes according to the applied strain. In addition, a transmittance-changing sensor was developed and fabricated by synthesizing additional glass nanoparticles. Furthermore, a strain sensor was developed that is largely transparent at the target strain and opaque otherwise.
김건휘(Geon Hwee Kim),안태창(Taechang An) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.10
웨어러블 디바이스에는 센서, 디스플레이, 투명/유연 전극 등 여러 부품들이 사용된다. 이러한 부품들에서 필수적으로 필요한 기술은 전도층을 제작하는 것이다. 각각의 용도에 맞게 투과도와 전기전도도를 적절히 조절하며 전도층을 제작하는 기술의 확보가 필수적이다. 또한 일상 생활에서 생길 수 있는 정도의 자극에 대해 큰 변화가 없는 전기적 특성을 유지하는 것도 필수적이다. 이를 달성하기 위해 본 연구에서는 아주 긴 형태의 금속 나노섬유 네트워크를 제작하여 투명전극을 제작하였다. 제작한 투명전극은 전기전도도, 투과도를 능동적으로 조절할 수 있었을 뿐만 아니라 우수한 접합특성을 가지고 있음을 확인하였으며 수 만회의 bending에 대해서도 저항변화가 크지 않음을 확인할 수 있었다. Various components are used in wearable devices, such as sensors, displays, and transparent/flexible electrodes. An essential skill in these parts is to fabricate the conductive layer. It is essential to secure the technology to produce a conductive layer while appropriately adjusting the transmittance and electrical conductivity for each application. It is also essential to maintain electrical characteristics that do not change significantly in response to stimuli that may occur in daily life. To achieve this, in this study, a very long metal nanofiber network was fabricated to fabricate a transparent electrode. It was confirmed that the fabricated transparent electrode was able to actively control electrical conductivity and transmittance, as well as having excellent bonding characteristics. It was also confirmed that resistance change was not large even after tens of thousands of bending.