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장인수 ( Insoo Jang ),양창섭 ( Changsop Yang ),선승호 ( Seungho Sun ),정민정 ( Minjeong Jeong ),한창호 ( Changho Han ),황의형 ( Eui-hyoung Hwang ),서형식 ( Hyungsik Seo ) 경락경혈학회 2019 Korean Journal of Acupuncture Vol.36 No.1
Objectives : Carbon dioxide (CO<sub>2</sub>) laser, a high power laser has been used for pain management, dermatology, and surgery and laser acupuncture and moxibustion as well, since it had been oscillated in 1964 at Bell Telephone Laboratories in the US. The purpose of this study is to investigate the history of CO<sub>2</sub> laser acupuncture through reviewing studies published in early stage of laser medicine. Methods : To investigate the early history of CO<sub>2</sub> laser acupuncture, studies were searched in the electronic databases, including PubMed, ScienceDirect, CNKI, Wanfang, J-STAGE, CiNii, KTNP, and OASIS, since 1964. Articles in English, Chinese, Japanese and Korean were included, and there were no limitations in literature types such as reviews, essays, clinical trials, animal experiments and veterinary research. Results : We found that the first CO<sub>2</sub> laser application to acupoints was done by a research team in Shanghai in 1976. They used CO<sub>2</sub> laser for acupuncture treatment and it was also the first laser acupuncture treatment in China. Since the first case report of CO<sub>2</sub> laser for leukopenia, it has been applied to various diseases in China, Korea, Japan and other western countries. It has been widely applied in the fields of dentistry and veterinary medicine, as well as clinical applications. Conclusions : Not only CO<sub>2</sub> laser can be used as laser acupuncture by stimulating the acupoints and meridians, but also can produce moxibustion effect by using heat stimulus. Therefore, it is expected that it will be used in various clinical fields in the future.
Fabrication of nickel oxide-yttria stabilized zirconia films by electrostatic spray deposition
Sungeun Jang,Insoo Hwang,Jongmo Im,박인유,신동욱 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.6
The commonly used NiO-YSZ cermet is known to have many desirable properties for the anode of solid oxide fuel cells (SOFCs), such as high electronic and ionic conductivity, high electrochemical activity, and good microstructural stability. When used as an anode of an SOFC, the critical factor determining the performance of the NiO-YSZ composite material is the porosity and pore size to ensure a large enough effective surface area for electrochemical oxidation. In this study, electrostatic spray deposition (ESD) was applied to fabricate a porous film of a NiO-YSZ cermet. An ESD system has several advantages over the conventional thick film process, such as creating a uniform coating for large areas, in expensive and simple equipment, high synthesis efficiency, fast deposition rate, a diversity of raw materials selection, operation at atmospheric conditions, and easy control of deposition rate and film thickness. A solution of NiO-YSZ (NiO- 8 mol% yttria stabilized zirconia) in methanol was sprayed onto the anode substrate surface at 350-500 °C by ESD. The Porosity and microstructure were controlled by changing the deposition process parameters and the sintering temperature. The deposition parameters studied were substrate temperature, distance between nozzle and substrate, deposition time and DC voltage. The commonly used NiO-YSZ cermet is known to have many desirable properties for the anode of solid oxide fuel cells (SOFCs), such as high electronic and ionic conductivity, high electrochemical activity, and good microstructural stability. When used as an anode of an SOFC, the critical factor determining the performance of the NiO-YSZ composite material is the porosity and pore size to ensure a large enough effective surface area for electrochemical oxidation. In this study, electrostatic spray deposition (ESD) was applied to fabricate a porous film of a NiO-YSZ cermet. An ESD system has several advantages over the conventional thick film process, such as creating a uniform coating for large areas, in expensive and simple equipment, high synthesis efficiency, fast deposition rate, a diversity of raw materials selection, operation at atmospheric conditions, and easy control of deposition rate and film thickness. A solution of NiO-YSZ (NiO- 8 mol% yttria stabilized zirconia) in methanol was sprayed onto the anode substrate surface at 350-500 °C by ESD. The Porosity and microstructure were controlled by changing the deposition process parameters and the sintering temperature. The deposition parameters studied were substrate temperature, distance between nozzle and substrate, deposition time and DC voltage.
Choi, Insoo,Kim, Hak-Yoon,Ahn, Sang Hyun,Hwang, Seung Jun,Yoo, Sung Jong,Kim, Ho Young,Choi, Jihui,Park, Hyan Joo,Jang, Jong Hyun,Kim, Soo-Kil American Scientific Publishers 2016 Journal of nanoscience and nanotechnology Vol.16 No.10
<P>Electrochemical conversion of carbon dioxide to formic acid was attempted on Sn-Zn alloy catalysts. The alloy catalysts were fabricated by electrodeposition, and their compositions were controlled by varying the concentration of the precursor solution. A home made proton exchange membrane-based electrochemical cell was used for the reduction of carbon dioxide. The concentration of formic acid produced and the conversion efficiency were determined via electrolysis and high performance liquid chromatography analysis. The effect of the alloy composition on the amount of formic acid generated and the conversion efficiency was evaluated, and alloy composition was found to have a strong influence on these variables. It was thus concluded that the conversion of carbon dioxide to formic acid can be enhanced by alloying Zn with Sn.</P>