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Flake-type Ag분말의 입자크기에 따른 신축성 전극 특성 연구
남현민,서민호,남수용 한국마이크로전자및패키징학회 2022 마이크로전자 및 패키징학회지 Vol.29 No.4
본 연구에서는 실버 파우더의 입자 크기, 즉 평균입자 크기가 2μm, 7μm, 이들의 혼합(50:50wt%), 이렇게 3가지 실버 페이스트를 제조하여 점도 및 점탄성, 경화후에 잔류용제 유무 확인을 위한 TGA측정, Strain에 따른 저항변화및 전극 표면구조 변화에 대해서 검토한 결과 다음과 같은 결론을 얻을 수 있었다. 이러한 결과를 정리하면 Strain에 따른 저항변화를 최소화하기 위해서는 실버 파우더의 입자를 2μm정도인 것이 가장 바람직함을 알 수 있었다. In this study, the average particle size of silver powder was 2μm, 7μm, and a mixture of these (50:50wt%), three kinds of silver pastes were prepared. In addition, as a result of examining the viscosity and viscoelasticity of the three silver pastes, TGA measurement, resistance change according to strain, and change in surface structure of the electrode, the following conclusions were obtained. Summarizing these results, it was found that it is most desirable to have a particle size of about 2μm in order to minimize the change in resistance due to strain.
Silver Powder의 입자 크기에 따른 Stretchable 전극 특성 연구
남현민,백강준,남수용 한국화상학회 2022 한국화상학회지 Vol.28 No.4
본 연구에서는 실버 파우더의 입자 크기, 즉 평균 입자 크기가 2㎛과 7㎛, 이렇게 2가지 실버 페이스트를 개발하였다. 이렇게 개 발된 실버 페이스트에 대해서 점도 및 점탄성, 경화후에 잔류용제 유무 확인을 위한 TGA측정, Strain에 따른 저항 변화 및 전극 표면 구조 변화에 대해서 검토하였다. 이러한 결과를 정리하면 Strain에 따른 저항 변화를 최소화하기 위해서는 실버 파우더의 입 자를 2㎛정도인 것이 가장 바람직함을 알 수 있었다. In this study, two silver pastes were developed, with the particle size of silver powder, that is, the average particle size, 2㎛ and 7㎛. For the silver paste developed in this way, viscosity and viscoelasticity, TGA measurement to check the presence or absence of residual solvent after curing, resistance change according to strain, and electrode surface structure change were reviewed. Summarizing these results, it was found that it is most desirable to have a particle size of about 2㎛ in order to minimize the change in resistance due to strain.
Scedosporium apiospermum 에 의한 국소 피부감염증
남현민,박석돈,권선용,김의경,박건 대한의진균학회 2011 대한의진균학회지 Vol.16 No.4
Scedosporium(S) apiospermum is the asexual stage of Pseudallescheria boydii. The organism has been isolated from polluted water, soil, sewage and potted plants in a hospital with low virulence. This ubiquitous fungus causes not only mycetoma, but also infections of variety of body sites including the skin. Localized skin infection without grain production due to this organism is much rarer than mycetoma. Infection may occur via direct inoculation and usually affects the extremities. We report a case of localized cutaneous infection due to S. apiospermum which occurred in a 79-year old female. She presented multiple erythematous papulopustules on the right wrist. Culture isolation for definitive diagnosis showed S. apiospermum. The patient was treated successfully with oral itraconazole 200 mg daily for 4 weeks.
남현민 ( Hyun Min Nam ),권선용 ( Sun Yong Kwon ),김의경 ( Ui Kyung Kim ),박석돈 ( Seok Don Park ),박건 ( Kun Park ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.5
Pincer nail deformity is a nail deformity characterized by a transverse overcurvature of the nail plate, which increases along the longitudinal axis. Many conservative and surgical treatment modalities have been reported. Conservative methods can be difficult to use in cases of severe deformity because of their high recurrence rate. Therefore, surgical techniques, including nail matricectomy or correction of the nail bed, have been preferred in these cases. Matricectomy is generally considered as the surgical treatment of pincer nail deformity because of low recurrence rate in the field of dermatology. However, poor cosmetic results (e.g. narrowing of nail plate) are frequently observed. We present here a case of pincer nail deformity in the left great toe in a 57-year-old man who was treated successfully with widening of the nail bed without matricectomy. This method is an effective surgical technique preserving the nail matrix for the correction of pincer nail deformity. (Korean J Dermatol 2012;50(5): 451∼455)