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Yim, Changyong,Yun, Minhyuk,Jung, Namchul,Jeon, Sangmin American Chemical Society 2012 ANALYTICAL CHEMISTRY - Vol.84 No.19
<P>A novel quartz resonator was developed to measure, simultaneously, changes in the mass and electrical resistance of a polyaniline film during the absorption of water vapor. Interdigitated gold electrodes were vacuum-deposited on the sensing surfaces of the quartz crystals, and polyaniline films were drop-cast on the electrodes used to measure the changes in the electrical resistance. Two symmetric semicircular gold electrodes were deposited on the bottom surface of the quartz crystal. These electrodes were used to measure the changes in the mass of absorbed water based on the changes in the resonance frequency. The simultaneous measurements of mass and electrical resistance shed light on the interactions between the water vapor and the polyaniline film. The resonator was exposed to various organic gases, including ethanol, acetone, or chloroform, and each gas was found to produce characteristic changes in the normalized electrical resistance.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancham/2012/ancham.2012.84.issue-19/ac3013785/production/images/medium/ac-2012-013785_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ac3013785'>ACS Electronic Supporting Info</A></P>
Yim, Changyong,Lee, Moonchan,Kim, Wuseok,Lee, Sanghee,Kim, Gook-Hee,Kim, Kyong Tae,Jeon, Sangmin The Royal Society of Chemistry 2015 Chemical communications Vol.51 No.28
<P>Zinc oxide nanorods were synthesized directly on a silicon microcantilever and converted into a nanoporous ZIF-8 film <I>via</I> a solvothermal reaction. The simultaneous measurements of the resonance frequency and deflection of the cantilever revealed that the adsorption of alcohol vapors induced a structural change in the ZIF-8 framework.</P> <P>Graphic Abstract</P><P>ZnO nanorods were converted to ZIF-8 films on silicon microcantilevers and the response to alcohol vapor was examined. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5cc01315a'> </P>
플래시라이트를 이용한 금속나노입자 기반 전극 및 금속유기골격체 합성 전략
임창용 ( Changyong Yim ),백새연 ( Saeyeon Baek ),박소연 ( Soyeon Park ),김하민 ( Hamin Kim ) 한국공업화학회 2020 공업화학 Vol.31 No.6
Intensive pulsed light (IPL) 기술은 빛을 millisecond 단위의 짧은 시간에 상온, 상압 환경에서 대상 물질에 조사하여 에너지를 전달한다. 이렇게 단시간에 조사되는 특징을 가진 플래시라이트(flashlight)에 대한 관심의 증대로 IPL을 이용한 금속입자의 광소결 연구가 대표적으로 이루어져 왔으며, 최근에는 IPL을 다양한 물질 합성에 적용한 사례가 발표되고 있다. 본 총설 논문은 지금까지 연구되어 밝혀진 IPL을 활용한 다양한 물질 합성 전략들에 대한 것으로 IPL 기술을 이용한 물질 합성에 대한 이해를 증진시키고자 한다. 특히, 금속나노입자의 소결을 이용한 유연 전극제작 및 금속유기골격체(metal-organic framework, MOF) 합성을 다루었다. 전극제작의 핵심 요소인 전극의 산화 저항성과 전기전도도 향상을 위한 과정을 다루었고, 금속기판으로부터 금속유기골격체를 합성하는 과정을 설명하였다. 이를 향후 IPL을 이용한 전극 제작 및 물질 합성 응용에 관한 연구를 하는 연구자에게 이해하기 쉽게 설명하고자 하였다. Intensive pulsed light (IPL) technique enables energy to be transferred to a target substance in a short time per millisecond at room temperature under an ambient atmosphere. Due to the growing interest in flashlights with excellent functionality among various technologies, light-sintering research on metal particles using IPL has been carried out representatively. Recently, examples of the application of IPL to various material synthesis have been reported. In the present article, various strategies using IPL including the manufacture of flexible electrodes and the synthesis of metal-organic frameworks were discussed. In particular, the process of improving oxidation resistance and electrical conductivity of electrodes, and also the metal-organic framework synthesis from metal surface were explained in detail. We envision that the review article can be of great help to researchers who investigate electrode manufacturing and material synthesis using IPL.
Design and Implementation of an Internet-TV Based E-Commerce System
Jaegeol Yim,Changyong Han 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.1
This paper introduces our design and implementation of an E-commerce system. One of the most distinguished features of this system is that an Internet TV system is integrated in the E-commerce system. In addition to the salient features for E-commerce such as price comparison, guarantee of the product quality, comments of other buyers, and so on, this system streams out a sequence of video contents just like home-shopping TV channels do. Our design and implementation details are discussed in this paper.
준중형급 승용차에서의 RCAR 성능 개선을 위한 해석적 연구
윤창용(Changyong Yoon),임종현(Jonghyun Yim),곽라경(Rakyung Gwak) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Today, vehicle repairability of passenger cars in low-speed crash is becoming a key element of their purchasing decision for car buyers, and it has been an important topic in RCAR (Research Council for Automobile Repairs) performance development. Appling the repairable components(breakable mounting bracket, Pin, etc.) prevent serious damage of the expensive component such as CRFM. Therefore, vehicle manufacturers have tried to improve repairability and to reduce the repair cost using repairable component. In this paper, CAE development study has been performed to reduce the repair cost, and production design was applied to compact passenger car in the Europe and Korea market. To get more accurate simulation result of RCAR test mode, physical test was performed and compared with CAE result. Plastic strain criteria in CAE result review is also set-up as part damage guideline. Finally, developed vehicle was successfully assessed by KART(Korea Insurance Repair Research and Training Center) in 2008.