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RISS 인기검색어
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- 저자 : 정현윤(Hyeon-Yun Jeong) (검색결과 2 건)
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MWCNT/PEDOT:PSS 기반 습도센서 제작을 위한 EHD 패터닝 공정 연구
정현윤(Hyeon-Yun Jeong),양영진(Young-Jin Yang),고정범(Jeong-Beom Ko) 한국기계가공학회 2024 한국기계가공학회지 Vol.23 No.10
Currently, the EHD patterning technology is applied to a wide range of sensor applications, such as temperature and humidity sensors, using various functional materials. In this study, we optimized the EHD patterning process for AgNPs and MWCNT/PEDOT:PSS materials to fabricate a resistive humidity sensor based on Ag-MWCNT/PEDOT:PSS. After implementing the line patterns using a multihead direct patterning device, we optimized the linewidth values according to the control conditions of the process variables. Based on the optimized process conditions, we printed the AgNP electrode layer pattern and MWCNT/PEDOT:PSS sensing layer to fabricate an all-printed humidity sensor. The fabricated humidity sensor exhibited a sensitivity of 12.13 Ω/%RH in the relative humidity range of 30%–90% RH. The humidity sensor fabricated through the optimized EHD patterning process can be efficiently applied to a wide range of applications, including industrial applications and in the food and medical fields.
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Optimized Microstructures for High Performance Ag/MWCNT/Ecoflex- based Flexible Pressure Sensors
정현윤(Hyeon Yun Jeong),고정범(Jeong Beom Ko) Korean Society for Precision Engineering 2025 한국정밀공학회지 Vol.42 No.8
Recently, flexible pressure sensors featuring enhanced sensitivity and durability through nano/micro additive manufacturing have been employed in various fields, including medical monitoring, E-skin technology, and soft robotics. This study focuses on the fabrication and verification of an interdigitated electrode (IDE) based flexible pressure sensor that incorporates microstructures, utilizing a direct patterning-based additive process. The IDE-patterned sample was designed with a total size of 7.95 × 10 mm2, a line width of 150 µm, a spacing of 200 µm, and a probe pad measuring 1.25 × 2 mm2. It was fabricated using AgNP ink on a primed 100 µm thick polyethylene naphthalate (PEN) substrate. The electrode layer was subsequently covered with a sensing layer made of a MWCNT/Ecoflex composite material, resulting in the final pressure sensor sample. Measurements indicated that the sensor exhibited good sensitivity and response speed, and it was confirmed that further improvements in sensitivity could be achieved by optimizing the size, spacing, and height of the microstructures. Building on the flexible pressure sensor structure developed in this study, we plan to pursue future research aimed at fabricating array sensors with integrated circuits and exploring their applicability in wearable devices for pressure sensing and control functions.
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