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권혁문(Hyuk-Moon kwon),카오미드(Accarat Choumead),성열문(Youl-Moon Sung),박차수(Cha-Soo Park) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
Electrochemiluminescence (ECL) involves the generation of species at electrode surfaces that then undergo electron-transfer reactions to form excited states that emit light. ECL is a means of converting electrical energy into radiative energy. It involves the production of reactive intermediates from stable precursors at the surface of an electrode. These intermediates then react under a variety of conditions to form excited states that emit light. In this work, the ECL cell using nanocrystalline TiO₂ electrode and Ru (Ⅱ) complex (Ru(bpy)₃²?) is fabricated for low-cost high-efficient energy conversion device application. The nanocrystalline TiO₂ electrode (~10 ㎛ thickness) with large surface area (~360 ㎡/g) can largely inject electrons from nanoporous TiO₂ layer and allows the oxidation/reduction of Ru (Ⅱ) complex in the nanopores. The cell structure is composed of a glass/ FTO/ nanocrystalline TiO₂/ Ru (Ⅱ) complex in propylene carbonate/ ITO/ glass.
급성 간성 포르피리아가 동반된 인슐린 의존성 당뇨병 1 예
권혁문(Hyuck Moon Kwon),김경래(Kyung Rae Kim),김복성(Bok Seong Kim),임승길(Sung Kil Lim),허갑범(Kap Bum Huh) 대한내과학회 1986 대한내과학회지 Vol.30 No.6
N/A Acute intermittent porphyria may be defined most simply as an inborn error of metabolism characterized chemically by the excessive excretion of porphyria precursors(porphobilinogen and usually aminolevulinic acid) and characterized clinically by episodes of neurologic dysfuntion. The disaese is complex, involving variable patterns of autonomic and peripheral neuropathy as well as central nervous system manifestions. There may be alterations in carbohydrate, lipid, water, and electrolyte metabolism in addition to clinically inapperent endocrine abnormalities. The fundamental defect is though to be a 50% decrease of porphobilinogen deaminase, the third enzyme of the heme biosynthetic pathway. This is associated with a marked increase of hepatic δ-aminolevulic acid synthetase, the first and rate controlling enzyme of the pathway. We experienced that 30 year old female admitted to our hospital due to recurrent attacks of abdominal pain, nausea and vomiting just before mensturation or during pregnancy. On past history, she has suffered from juvenile onset insulin dependent diabetes mellitus and used insulin(NPH 16 units) for 10 years. She was diagnosed as acute hepatic porphyria by the positive PBG test of Haesch method, and treated by hypertonic dextrose solution with insulin. Although the glucose tolerance test is abnormal by classical criteria in many patients, paricularly during activity of the disease, the association of porphyria and diadetic ketoacidosis is rare. In this situation, the accurate diagnosis and prompt treatment may be delayed because of similar clinical manifestation and there is complexed problem between hypertonic dextrose solution required for porphyria and hypertonic dextrose solution aggrevated for diabetic ketoacidosis.
나노입자 이산화티타늄 전극 기반의 고효율 전기화학형 발광 셀 제작
권혁문(Hyuk-Moon Kwon),한치환(Chi-Hwan Han),성열문(Youl-Moon Sung) 대한전기학회 2010 전기학회논문지 Vol.59 No.2
In this work, electrochemiluminescence (ECL) cell using nanocrysralline TiO₂ electrode and Ru(Ⅱ) complex (Ru(bpy)₃<SUP>2+</SUP>) is fabricated for low-cost high-efficient energy conversion device application. The nanocrysralline TiO₂ layer (~10㎛ thickness) with large surface area (~360㎡/g) can largely inject electrons from nanoporous TiO₂ electrode and allows the oxidation/reduction of Ru(Ⅱ) complex in the nanopores. The cell structure is composed of a glass/ F-doped SnO₂(FTO)/ porous TiO₂/ Ru(Ⅱ) complex in acetonitrile/ FTO/ glass. The nanocrysralline TiO₂ layer is prepared using sol-gel combustion method. The ECL efficiency of the cell consisting of the porous TiO₂ layers was 250 ㏅/W, which was higher than that consisting of only FTO electrode (50㏅/W). The nanoporous TiO₂ layers wwas effective for increasing ECL intensities.
권혁문(Hyuk-Moon Kwon),곽동주(Dong-Joo Kwak),박민우(Min-Woo Park),성열문(Youl-Moon Sung) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
본 연구에서는 DSCs 제작시 고가의 TCO전극을 사용하지 않고, Ti plate와 SUS plate를 작업전극으로 대체하여 DSCs를 제작하였다. Ti plate와 SUS plate를 작업전극을 제작한 샘플은 Jsc 및 효율에서 큰 차이를 보였지만, 상대전극으로 사용시 큰 차이가 없었다. 이는 백금을 코팅한 상대전극에서 빛이 반사되어, 입사되는 빛의 양이 줄어들었기때문에 Jsc 및 효율이 낮게 나온것으로 판단되었다. 향후 FTO glass에 백금을 스퍼터링하여 투명도를 조절하는 실험이 필요할 것으로 보인다.
권혁문(Hyuk-Moon Kwon),곽동주(Dong-Joo Kwak),성열문(Youl-Moon Sung),송재은(Jae-Eun Song) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
In this study, used simplest sandwich cells containing Ru2? liquid electrolytes in order to clarify the role of nanoporous TiO₂ electrodes. And, the cell structure is as follow: F:SnO₂ glass/ nanoporous TiO₂/ tris(2,2'-bipyridy)ruthenium(Ⅱ) colplex [Ru(bpy)₃(PF?)₂] in acetonitrile/ F:SnO₂ glass. The result, we found that ECL intensities increased rapidly by use of cathodes with nanoporous TiO₂ layers. And, porous TiO₂ electrodes were confirmed to be efficient for ECL devices as well as solar cell devices. It is thought that the increases in the ECL intensities may be associated with both formation of Ru? in porous TiO₂ electrodes and the process taking place after reduction of Ru? which occurs in the nanoporous electrodes.