http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
임현의(Hyuneui Lim),최경린(Kyung-Rin Choi),김완두(Wan-Doo Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Superhydrophobic surfaces are the typical biomimetic structures having the useful applications in several key technological areas. In this paper, we report a simple method for creating super-water-repellent surface using a combination of colloidal lithography and plasma etching. The nanostructured surface was formed by plasma etching with colloidal bead mask. The well-ordered nanostructure was coated with the fluoroalkylsilane self-assembled monolayers to get the chemical layers of low surface energy. For water contact angle, the nanostructured surface was showed about 150°. For hexadecane water contact angle, the nanostructuring yields contact angle higher than 100°.
임현의(Hyuneui Lim),박승철(Seung-Chul Park),여선주(Seonju Yeo),오선종(Sunjong Oh),이보연(Bo-Yeon Lee),김영수(Youngsoo Kim),이준희(JunHee Lee),허신(Shin Hur),김완두(Wandoo Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
자연의 공정은 바텀업으로 자원과 에너지를 최소화하며 이루어진다. 과학기술의 발전은 편하고 윤택한 현재의 삶을 이루어 냈지만 환경오염, 자원의 남용 등 풀어야할 또다른 문제를 야기하고 있다. 이제는 우리가 물건을 제조하는 공정에서부터 자연을 보고 아이디어를 내야할 시점에 도달했다고 생각되며, 보다 근본적인 제조공정에 대한 혁신적인 고민이 필요할 때이다. 본 연구에서는 자연의 방식처럼 쌓아 올리는 적층 공정과 분자간 인력에 기반한 자기조립공정을 하이브리드화 하여 분자레벨부터 제조를 하는 연구의 개념을 소개하고자 한다. 이러한 고분해능의 프린팅 공정이 개발된다면 나노부터 미터급까지 멀티 스케일의 새로운 제조공정이 마련되어 초경량 소재, 신약, 진단치료용 로봇 등을 쉽게 제조할 수 있을 것이라 기대되며, 기초연구 결과로부터 가능성을 확인할 수 있었다.
임현의(Hyuneui Lim),노정현(Junghyun Noh),김재윤(Jae-Yun Kim),김완두(Wan-Doo Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Metallization and metal nanostructures on semiconductors play a key role in the production process of MEMS/NEMS and arrayed nanosensors. We demonstrate a novel gold nanoparticle deposition as a result of the immersion of semiconductor substrates into dilute aqueous solution of AuCl⁴?. Deposition proceeded via galvanic displacement in the absence of pH adjusters and external reducing agents. The deposition rate, surface morphology and nanoparticle shape depend on the plating parameters as well as underlying semiconductor substrate. Deposited gold nanoparticles exhibit excellent adhesion to GaAs and InSb surfaces but not to InP and Si, independent of the plating time. This manner of deposition serves as a cost-effective, high-throughput method with potential applications such as high resolution patterning, interconnects, and metallization of MEMS/NEMS and nanodevice.
임현의(Hyuneui Lim),이지혜(Jihye Lee),노정현(Junghyun Noh),김완두(Wan-Doo Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Recent advances in nanosensors based on nanowires and nanotubes have revolutionized sensing technology to provide label-free, rapid, sensitive, and selective detection of a wide range of chemical and biological species. Especially, conducting polymers are promising materials for future applications in fields such as electronics and sensing because of their electrical properties, mechanical flexibility, relative ease of processing and funtionalization. In this paper, we demonstrate the polypyrrole nanowire sensor grown electrochemically, using microfabricated nanochannels. The effects of various parameters on nanowire growth were investigated systematically. This manner of sensor serves as a individually addressable nanowire sensor arrays with controlled dimensions, positions and chemical compositions for chemical and biomolecule detection.
HG-ICP-AES를 이용한 Germanium 분석에 있어서 보조산에 대한 연구
임현의,이연희,김선태,김영상,김강진,Lim, Hyuneui,Lee, Yeunhee,Kim, Sun-Tae,Kim, Young-Sang,Kim, Kang-Jin 한국분석과학회 2001 분석과학 Vol.14 No.1
수소화물생성법-유도결합플라스마-원자방출분광법으로 게르마늄을 분석할 때 보조산으로 phosphoric acid의 사용은 nitric acid, hydrochloric acid, sulfuric acid, perchloric acid, boric acid, tartaric acid, malic acid, oxalic acid, acetic acid, tannic acid, citric acid의 사용보다 높은 수소화물 생성효율을 보였고, 같은 pH영역이라도 phosphate ion이 존재하는 buffer의 사용이 더 높은 생성효율을 보였다. 또한, 2.5M phosphoric acid를 이용한 결과, 시료용액 내에 잔류하는 산이나 공존원소의 영향이 감소하였다. 환원제와 안정제의 농도가 증가할수록 수소화물 생성효율은 증가되었으며, 최대방출세기를 나타내는 산의 세기는 높은 쪽으로 이동했고 농도영역은 넓어졌다. 인산 존재 하에서의 게르마늄의 검출한계는 $0.03{\mu}g/L$이었다. The present work is aimed to evaluate the conditions of the hydride generation (HG) for germanium analysis by inductively coupled plasma (ICP)-atomic emission spectrometry (AES). Twelve different kinds of acids were used such as phosphoric, hydrochloric, nitric, sulfuric, perchloric, boric, tartaric, malic, oxalic, tannic, citric, and acetic acid. It was found that phosphoric acid yielded the maximum efficiency of hydride generation. Also, efficient hydride generation was obtined with the buffer solutions containing phosphate ions over a wide range of pH. In addition, in the presence of phosphoric acid the interference caused by metals was suppressed in the hydride generation of germanium. As the concentrations of a reducing agent and a stabilizing increased the hydride generation efficiency and the acid concentration proviaing the maximum intensity were increased. By using an analytical method developed in this study, the contents of germanium in water and rock samples were determined. The detection limit of germanium in the presence of phosphoric acid was $0.03{\mu}g/L$.
노정현(JungHyun Noh),임현의(Hyuneui Lim),김완두(Wan-Doo Kim),최대근(Dae-Geun Choi),정준호(Jun-Ho Jeon),이응숙(Eung-Sug Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Due to their high surface area that contacts the resist to the stamp, the strong adhesion of the imprinted resist to the stamp is one of the key reliability issues for the further progress in Nanoimprint Lithography(NIL). We have studied on the improved vapor-phase ultrathin coating method for the stamp release. The anti-stiction monolayer films deposited from Trichloro- (1H,1H,2H,2H-perfluorooctyl)silane and methyltrichlorosilane were characterized using contact angle analysis, atomic force microscopy(AFM) and x-ray photoelectron spectroscopy(XPS). The vapor- phase deposited monolayers were more effective than liquid-phase deposition in penetration into the nanoscale gaps of the mold and in film quality.