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마이크로 구조 및 동유체력을 이용한 나노와이어 미세 정렬 및 프린팅 기법
정용원,서정목,이상근,권혁호,이태윤,Chung, Yongwon,Seo, Jungmok,Lee, Sanggeun,Kwon, Hyukho,Lee, Taeyoon 한국재료학회 2013 한국재료학회지 Vol.23 No.10
The printing of nanomaterials onto certain substrates is one of the key technologies behind high-speed interconnection and high-performance electronic devices. For the printing of next-generation electronic devices, a printing process which can be applied to a flexible substrate is needed. A printing process on a flexible substrate requires a lowtemperature, non-vacuum process due to the physical properties of the substrate. In this study, we obtained well-ordered Ag nanowires using modified gravure printing techniques. Ag nanowires are synthesized by a silver nitrate ($AgNO_3$) reduction process in an ethylene glycol solution. Ag nanowires were well aligned by hydrodynamic force on a micro-engraved Si substrate. With the three-dimensional structure of polydimethylsiloxane (PDMS), which has an inverse morphology relative to the micro-engraved Si substrate, the sub-micron alignment of Ag nanowires is possible. This technique can solve the performance problems associated with conventional organic materials. Also, given that this technique enables large-area printing, it has great applicability not only as a next-generation printing technology but also in a range of other fields.
심재열(Jae-Yeul Shim),이상근(Sanggeun Lee),안석민(Seok-Min Ahn) 한국항공우주연구원 2012 항공우주기술 Vol.11 No.1
국내 최초의 인증용 민수 항공기(KC-100) 개발을 위하여 수행한 전기체 정적구조시험에 대하여 소개하였다. 구체적인 내용으로는 시험요구도, 시험프레임, 주요 시험장치들인 하중부가장치, 중량보상장치, 시험체 자세구속장치 및 잭킹 장치에 대하여 자세하게 설명하였고 특히 하중작용을 정확하게 부가하기 위하여 시험체의 설치와 하중부가치구의 설치에 대한 합치성을 보이는 과정을 자세하게 소개하였다. 전기체 하중시험 15가지와 국부하중시험 7가지 총 22가지 시험조건에 대하여 성공적으로 시험 수행하였고 시험 데이타들을 확보하였다. Full-scale static test was introduced for the KC-100 aircraft which is domestic civil aircraft to be certified for the first time. Test requirement, test frame, and important test stystems such as loading system, counterbalance system, restraint system and jacking system are explained in detail. Especially, the way to satisfy compliance for the installation of test article and loading system is introduced by using check sheets for the installations. 15 Full-scale and 7 local test conditions were successfully completed and the test data was obtained.
한희탁(Heetak Han),이상근(Sanggeun Lee),이태윤(Taeyoon Lee) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
For the last few years, organic based X-ray detector has been introduced due to its distinguishable properties with inorganic based detector. However, the X-ray detection performance of organic based detector was still not enough due to its low X-ray absorption property. In this report, we fabricated the absorption enhanced polymer based X-ray detector using composite of silver nanoparticles (AgNPs) and semiconducting polymer.