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Impedance를 이용한 전도성고분자 센서의 에탄올 가스 감응특성
이경문,유준부,전희권,이병수,이덕동,허증수,Lee, Kyung-Mun,Yu, Joon-Boo,Jun, Hee-Kwon,Lee, Byung-Soo,Lee, Duk-Dong,Huh, Jeung-Soo 한국재료학회 2003 한국재료학회지 Vol.13 No.3
The polypyrrole and polyaniline thin film sensors which were made by chemical polymerization were employed to detect ethanol gas. With a single sensor element we can obtain characteristic patterns of behaviour across a very wide frequency range when measuring either resistance or capacitance. Impedance spectroscopy was employed to study the gas sensing behavior of both capacitance and resistance based sensors with conducting polymer as the active sensing element.
전도성 고분자 센서 어레이를 이용한 휘발성 유기 화합물 가스 인식
이경문(Kyung Mun Lee),주병수(Byung Su Joo),유준부(Joon Boo Yu),황하룡(Ha Ryong Hwang),이병수(Byung Soo Lee),이덕동(Duk Dong Lee),변형기(Hyung Gi Byun),허증수(Jeung Soo Huh) 한국센서학회 2002 센서학회지 Vol.11 No.5
We fabricated gas recognition system using conducting polymer sensor array for recognizing and analyzing VOCs(Volatile Organic Compounds) gases. The polypyrrole and polyaniline thin film sensors which were made by chemical polymerization were employed to detect VOCs. The multi-dimensional sensor signals obtained from the sensor array were analyzed using PCA(principal component analysis) technique and RBF(radial basis function) Network. Throughout the experimental trails, we confirmed that RBF Network is effective than PCA technique in identifying VOCs.
광학식 표면측정법을 이용한 치과용 티타늄(Ti) 임프란트(Implant)의 표면토포그래피 평가
손재환(Jae-Hwan Son),조지승(Che-Seung Cho),이영문(Young-Moon Lee),이경문(Kyung-Mun Lee) 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-
Recently, use of Ti has been expanded as material of artificial joint and dental implant due to superior property of bio-suitability. Especially, dental implant requires surface evaluation as it have an important effect on surface structure. It is very important thing to evaluate performance of implant with optical surface measuring method on such a surface state. Surface topography is very useful in surface quality evaluation. It includes the evaluation of surface area, lateral area and surface roughness. In this study surface evaluations were carried out with two kinds of implants, machined and sandblasted after machining. Surface evaluation method using optical three-dimensional surface roughness measuring method is introduced.