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저차원 나노 소재 기반 다기능 전자파 차폐 및 센싱 응용기술
민복기,이윤식,탐반누엔,슈브라몬달,최춘기,Min, B.K.,Yi, Y.,Nguyen, V.T.,Mondal, S.,Choi, C.G. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.4
With the widespread use of high-performance electronics and mobile communications, electromagnetic interference (EMI) shielding has become crucial for protection against malfunctioning of electronic equipment and harmful effects to human health. In addition, smart sensor technologies will be rapidly developed in untact (non-contact) environments and personal healthcare fields. Herein, we introduce our recently developed technologies for flexible multifunctional EMI shielding, and highly sensitive wearable pressure-strain and humidity sensors realized using low-dimensional nanomaterials.
민복기,김성준,이윤식,최춘기,Min, B.K.,Kim, S.J.,Yi, Y.,Choi, C.G. 한국전자통신연구원 2018 전자통신동향분석 Vol.33 No.1
Tactile sensors, which are commonly referred to as pressure and strain sensors, have been extensively investigated to meet the demands for attachable and wearable electronics for monitoring the health status or activity of human users. For this purpose, the introduction of two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDs) with high mechanical strength at the atomic scale is very suitable for tactile sensors applicable for use in human-friendly devices. In this paper, we examine a descriptive summary of a tactile sensor and review state-of- the-art research trends of 2D material-based tactile sensors in terms of the material and architecture. Finally, we propose a roadmap for future studies into advanced tactile sensors based on our ongoing research.
FeZrBAg 자성막을 이용한 박막 인덕터의 임피던스 특성
송재성(J. S. Song),민복기(B. K. Min),허정섭(J. S. Heo),김현식(H. S. Kim) 한국자기학회 2000 韓國磁氣學會誌 Vol.10 No.5
Double rectangular spiral thin-film inductors were fabricated using Fe_(86.7)Zr_(3.3)B₄Ag_6 thin film with high permeability and resistance, in which easy axis of magnetization of the thin-film was perpendicular or parallel to the current direction. The perpendicular geometry inductor revealed higher inductance than the parallel geometry one, because spin aligns of magnetic film were more easily along the field direction due to higher field intensity in the perpendicular geometry. The increase of the inductance, however, resulted in the decrease of resonance frequency. The permeability was monitored by annealing the thin-films at different temperatures. With increasing the permeability, the inductance increased, but total resistance also increased due to the increase in magnetic core loss. As the resonance frequency was higher in air-core inductor than in magnetic thin-film core inductor, it is suggested to increase the resonance frequency that the characteristic of air-core inductor rather than the magnetic properties of the thin-film should be enhanced.