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RISS 인기검색어
- 검색키워드
- 저자 : 姜致中(C. J. Kang) (검색결과 17 건)
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열공압 방식으로 구동되는 미세 유체 제어 시스템의 제작 및 특성
柳鍾喆(Jong-Chul Yoo),姜致中(C. J. Kang),金容商(Yong-Sang Kim) 대한전기학회 2006 전기학회논문지C Vol.55 No.2
We present a microfluidic system with microvalves and a micropump that are easily integrated on the same substrate using the same fabrication process. The fabricated microfluidic system is suitable for use as a disposable device and its characteristics are optimized for use as a micro chemical analysis system (micro-TAS) and lab-on-a-chip. The system is realized by means of a polydimethylsiloxane (PDMS)-glass chip and an indium tin oxide (ITO) heater. We demonstrate the integration of the micropump and microvalves using a new thermopneumatic-actuated PDMS-based microfluidic system. A maximum pumping rate of about 730 nl/min is observed at a duty ratio of 1% and a frequency of 2 ㎐ with a fixed power of 500 ㎽. The measured power at flow cut-off is 500 ㎽ for the microvalve whose channel width, depth and membrane thickness were 400 ㎛, 110 ㎛ and 320 ㎛, respectively.
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표면 미세 가공기술을 이용한 마이크로 캔틸레버의 제작과 바이오센서로의 응용
兪炅我(Kyung-Ah Yoo),鄭承龍(Seung-Ryong Joung),姜致中(C. J. Kang),金容商(Yong-Sang Kim) 대한전기학회 2006 전기학회논문지C Vol.55 No.1
We propose an optical and an electrical detection methods for detecting various bio-molecules effectively with microcantilevers. The microcantilevers were fabricated employing surface micromachining technique that has attractive advantages in terms of cost efficiency, simplicity and ability of fabricating in array. The fluid cell system for injection of bio-molecular solution is fabricated using polydimethylsiloxane (PDMS) and a fused silica glass. The microcantilever is deflected with respect to the difference of the surface stress caused by the formation of self-assembled bio-molecules on the gold coated side of the microcantilever. It detected cystamine dihydrochloride and glutaraldehyde molecules and analyzed individual concentrations of the cystamine dihydrochloride solution. We confirm that the deflections of bending-up or bending-down are occurred by the bio-molecule adsorption and microcantilever can be widely used to a μ-TAS and a lab-on-a-chip for a potential detection of various bio-molecules.
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Polymer Gate Insulators에 따른 Pentacene Organic Thin-Film Transistors의 특성 분석
김정민(Jung-Min Kim),허현정(Hyun-Jung Her),윤정흠(J.H. Yoon),김재완(Jaewan Kim),최영진(Y. S. Choi),강치중(C. J. Kang),전동렬(D. Jeon),김용상(Yong-Sang Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
본 연구에서는 polymer gate insulators에 따른 pentacene 유기 박막 트랜지스터 (Organic Thin-Film Transistors)의 전기적 특성을 atom force microscope (AFM), x-ray diffraction (XRD) 그리고 I-V 측정을 이용하여 분석하였다. Pentacene 박막 트랜지스터의 전기적 특성은 pentacene의 증착 조건뿐만 아니라 polymer gate insulator에 따라 크게 영향을 받는다. 따라서 다양한 polymer 기판 위에 온도, 두께 그리고 증착 속도에 따라 Pentacene을 증착 하였다. 그리고 증착된 pentacne을 AFM, XRD를 이용하여 pentacene의 구조, 결정화 그리고 grain 크기 등을 분석하였다. 또한 inverted staggered 구조의 pentacne 박막 트랜지스터 소자를 제작하고 I-V 측정하여 그 결과를 분석하였다.
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연속흐름 중합효소연쇄반응칩 제작을 위한 인듐 산화막 전극의 특성분석
鄭承龍(Seung-Ryong Joung),金準赫(Jun-Hyeok Kim),李仁濟(In-Je Yi),姜致中(C. J. Kang),金容商(Yong-Sang Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.3
We propose glass and PDMS (polydimethylsiloxane) chips for DNA amplification with continuous-flow PCR (polymerase chain reaction). The PDMS microchannel was fabricated using a negative molding method for sample injection. Three heaters and sensors of ITO (indium-tin-oxide) thin films were fabricated on glass chip. ITO heaters and sensors were calibrated accurately for the temperature control of the liquid flow. ITO heater generated stable heat versus applied power. ITO sensor resistance was changed linearly versus temperature increase as a RTD (resistance temperature detector) sensor. As a result, we enable precision temperature control of continuous-flow PCR chip. Using the continuous-flow PCR chip DNA plasmid pKS-GFP 720 bp was successfully amplified.
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