http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Abraham, Sinoj,Jeong, Eun Ho,Arakawa, Takahiro,Shoji, Shuichi,Kim, Kyung Chun,Kim, Il,Go, Jeung Sang Royal Society of Chemistry 2006 Lab on a chip Vol.6 No.6
<P>In this article, the development of a novel technique to fabricate spherical polymeric microcapsules by utilizing microfluidic technology is presented. Atom transfer radical polymerization (ATRP) was employed to synthesize well-defined amphiphilic block copolymers. An organic polymer solution was constrained to adopt the spherical droplets in a continuous water phase at a T-junction microchannel, and the generation of the droplets was studied quantitatively. The flow conditions of two immiscible solutions were adjusted for the successful generation of the polymer droplets. The morphology of the microcapsules was examined. The efficiency of these polymer microcapsules as containers for the storage and controlled release of loaded molecules was evaluated by encapsulating the microcapsules with Congo-red dye and investigating the release performance using temperature controlled UV-VIS spectroscopy.</P> <P>Graphic Abstract</P><P>The priority of this work is the innovative conjunction of well-defined amphiphilic block copolymers and stable microfluidics to develop the functional spherical microcapsule with quantitative evaluation of its drug release performance, potentially aiming at mass-production. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b518006f'> </P>
Yoon, Dong Hyun,Ha, Jin Bong,Bahk, Yoen Kyung,Arakawa, Takahiro,Shoji, Shuichi,Go, Jeung Sang Royal Society of Chemistry 2009 Lab on a chip Vol.9 No.1
<P>This paper presents a microscale benefit of a secondary flow obtained in a curved rectangular microchannel, which is generally unfavorable and negligible in conventional fluid flow. We have demonstrated the separation and sorting of micro beads by their size using secondary flow. The physical mechanism occurring in the size-selective separation was explained based on the numerical analysis of the characteristic velocity distribution on the cross-sectional plane normal to the main flow stream. The dynamic trajectories of micro beads of different sizes and materials are visualized and compared for the experimental demonstration. We also discuss the effects of both the shape uniformity of the micro beads and the inlet condition on the size-selective separation.</P> <P>Graphic Abstract</P><P>The priority of this work is to suggest a microscale benefit. The strong secondary flow obtained in a curved rectangular microchannel is favorably used to separate micro beads by size. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b809123d'> </P>
Dae-Sik Lee,Yo Han Choi,Yong Duk Han,윤현철,Shuichi Shoji,Mun Youn Jung 한국전자통신연구원 2012 ETRI Journal Vol.34 No.2
The novelty of this study resides in the fabrication of stoichiometric and stress-reduced Si3N4/SiO2/Si3N4 triple-layer membrane sieves. The membrane sieves were designed to be very flat and thin, mechanically stress-reduced, and stable in their electrical and chemical properties. All insulating materials are deposited stoichiometrically by a low-pressure chemical vapor deposition system. The membranes with a thickness of 0.4 µm have pores with a diameter of about 1 µm. The device is fabricated on a 6” silicon wafer with the semiconductor processes. We utilized the membrane sieves for plasma separations from human whole blood. To enhance the separation ability of blood plasma, an agarose gel matrix was attached to the membrane sieves. We could separate about 1 µL of blood plasma from 5 µL of human whole blood. Our device can be used in the cell-based biosensors or analysis systems in analytical chemistry.
정은호(Eun Ho Jeong),Sinoj Abraham,Takahiro Arakawa,김일(Il Kim),Shuichi Shoji,고정상(Jeung Sang Go),김경천(Kyung Chun Kim) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The functional spherical microcapsules were produced through the innovative conjunction of the well-defined amphiphilic block copolymer and the stable droplet phase flow in the micro chemical plant. The microcapsules were formed to have hollow inner cavity and outer surface wall with nano-pores. To examine the potential of encapsulating foreign biochemical molecules, Congo-red dye was loaded into the microcapsule. The release performance in the specific surroundings such as temperature, pH and time was evaluated quantitatively.