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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.
노정현(Junghyun Noh) 대한임상노인의학회 2018 대한임상노인의학회지 Vol.19 No.1
The endocrine system is known to be involved to an aging process by gene mutations of endocrine signaling pathways. Complex changes multiple hormones within the endocrine system also occur in aging individuals. Changes in the concentration of hormones cause clinical symptoms and also impact health and disease. Hormone deficiencies with aging, result in vasomotor sypmptoms, fatigue, psychological symptoms, poor libido, decreased bone mass and lean body mass, and increased fat mass and insulin resistance. Many studies have been carried out to evaluate the effects of hormonal supplements on reversing or slowing down the aging process. This review explores the role of the endocrine system during this aging process and the changes of various hormones and resulting clinical significances in aging individuals.
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.
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이지혜(Jihye Lee),임현의(Hyuneui Lim),노정현(Junghyun Noh),김완두(Wan Doo Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In this study novel method of fabrication of conducting polymer nanowire device is proposed. Conducting polymer is electrochemically polymerized on the working electrode. After polymerization, a part of working electrode is removed by chemical etching, and eventually conducting polymer nanowire connected by both sides of electrodes is fabricated. Fabricated nanowire device is confirmed through scanning electron microscope images and the effects of process variables are investigated.
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.