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스파이로파이란에 의한 표면 개질 및 자외선에 의해 유도된 표면 전위에 대한 분석
이봉수,한동근,손태일,정영환,Lee, Bong-Soo,Han, Dong-Keun,Son, Tae-Il,Jung, Young-Hwan 대한화학회 2011 대한화학회지 Vol.55 No.3
스파이로파이란이 함유된 물질은 자외선의 조사(irradiation)에 의해 메로시아닌 파생물로 변화되는데 이 물질은 페놀레이트 음이온과 아민 양이온으로 구성된 쌍극성(zwitterion) 이온을 가지고 있다. 이와 같은 메로시아닌 표면위에서 페놀레이트 음이온과 니켈 금속 양이온의 복합화는 표면 전하의 변화를 일으키며, 이를 Kelvin prove force microscopy (KFM)를 이용하여 측정하였다. 자외선 노출 시간에 따라 쌍극성 이온의 발생량의 정도가 달라지고, 이것을 표면 전위를 통해서 금속 이온을 매개로 간접적으로 측정할 수 있었으며 표면 전위는 자외선 노출시간이 증가함에 따라 선형적으로 감소하다가 결국 포화상태가 됨을 관측하였다. 또한 자외선 노출 시간이 증가함에 따라 니켈 이온의 부착된 양이 증가되는 결과를 XPS 방법을 사용하여 분석할 수 있었다. 이러한 성질은 다른 금속 이온의 검출 및 양적 분석을 위해 이용될 수 있을 것으로 생각되며, 금속이온과 결합 가능한 단백질이나 세포와 같은 생체물질을 양적 변화를 표면 전하량에 따라 제어할 수 있는 가능성을 제시하였다. 지금까지의 결과를 바탕으로 고선택성, 고감도를 가지고, 생체 물질의 정량적인 제어가 가능한 지지체 혹은 바이오칩을 만들 수 있을 것으로 예상한다. Merocyanine derivatives transformed from spiropyran-containing compounds by irradiating the light of ultraviolet (UV) include zwitterion of phenolate anion and amine cation. Complexation of this phenolate anion on merocyaninemodified surface and Ni ion among metal ions led to a change of surface charge and it was measured with kelvin prove force microscopy (KFM). We found that the resultant surface potential decreased linearly as UV-exposed time increased, and finally were saturated. Also it was analyzed through XPS the immobilized amount of Ni ions was increased according to increase of UV-exposed time. It is considered that these properties could be applied for detection and a quantitative control of different metal ions. Further research is to aim construct specific scaffold/matrix which enable high selective, high sensitive and, especially, a quantitative immobilization of metal ions-binding biomaterials such as proteins and cells.
TSCM을 이용한 플라스틱 광섬유 온도센서의 제작 및 특성평가
이봉수 ( Bong Soo Lee ),허혜영 ( Hye Young Heo ),조동현 ( Dong Hyun Cho ),김신 ( Sin Kim ),조효성 ( Hyo Sung Cho ) 한국센서학회 2005 센서학회지 Vol.14 No.3
In this study, a plastic fiber-optic temperature sensor is fabricated using TSCM(thermo sensitive clouding material) which changes its light transmittance with temperature and the characteristics of this sensor are evaluated. The fabricated fiber optic temperature sensor is the reflector type using a Y-coupler. The optimum light source and reflector are decided by measuring the amount of reflected light through TSCM. Also, the optimum distance from the end of sensor to the surface of reflector is determined. Then the relationship between the amount of measured reflected light and the temperature of TSCM is found.
섬광검출을 위한 플라스틱광섬유에서의 체렌코프 빛 측정 및 제거
조동현 ( Dong Hyun Cho ),장경원 ( Kyoung Won Jang ),유욱재 ( Wook Jae Yoo ),신상훈 ( Sang Hun Shin ),이봉수 ( Bong Soo Lee ),박병기 ( Byung Gi Park ),조효성 ( Hyo Sung Cho ),김신 ( Sin Kim ) 한국센서학회 2008 센서학회지 Vol.17 No.2
The objectives of this study are to measure and to remove Cerenkov lights generated in a fiber-optic radiation sensor by a charge-coupled device. we have fabricated a fiber-optic radiation sensor which comprises an organic scintillator, a plastic optical fiber and a charge-coupled device. Charge-coupled device as a light measuring tool has many advantages which are easy in multi-dimensional measurements, high spatial resolution and relatively low cost.
광학 필터를 이용한 광섬유 방사선 센서의 체렌코프 빛 제거
장경원,이봉수,조동현,김형식,이정한,이정환,김신,조효성,Jang, Kyoung-Won,Lee, Bong-Soo,Cho, Dong-Hyun,Kim, Hyung-Shik,Yi, Jeong-Han,Lee, Jeong-Whan,Kim, Sin,Cho, Hyo-Sung 한국광학회 2006 한국광학회지 Vol.17 No.4
본 연구에서는 유기 섬광체와 플라스틱 광섬유를 이용하여 치료용 전자선의 계측을 위한 광섬유 방사선 센서를 제작하였다. 또한, 선형가속기에서 발생되는 고 에너지 전자선에 의해 광섬유 방사선 센서를 이용한 전자선 계측에 있어 방해요소로 존재하는 체렌코프 빛을 감법 및 광학 필터링을 이용하여 제거하였고 두 가지방법들을 비교, 분석하였다. In this study, a miniature fiber-optic radiation sensor has been developed using a water-equivalent organic scintillator for electron beam therapy dosimetry. The intensity of Cerenkov light is measured and characterized as a function of the incident angle of the electron beam from a LINAC. Also, a subtraction method using a background optical fiber without a scintillator and an optical discrimination method using optical filters are investigated to remove Cerenkov light, which could cause problems or limit the accuracy for detecting a fluorescent light signal in a fiber-optic radiation sensor.
SEED 블록암호알고리즘을 적용한 통합 사례관리 시스템(ECM) 개발에 관한 연구
오동식(Dong Sic Oh),이봉수(Bong Soo Lee) 산업기술교육훈련학회 2015 산업기술연구논문지 (JITR) Vol.20 No.4
In this paper, an integrated case management system(ECM) that has SEED block cipher algorithm with excellent characteristics to the security and reliability is proposed We found that this implementation can improve the security, reliability and user comfort of weakness existing integrated case management system on spring based java framework technology. As a result, we improved the performance of the part of the user interface section and was applied to real world applications.
고대(古代) 건물지(建物址)의 조영척도(造營尺度)에 관한 고찰(考察) -미륵사 동.서 금당지를 중심으로-
김영필,이상선,이봉수,장동국,박강철,Kim, Young-Phil,Lee, Sang-Sun,Lee, Bong-Soo,Chang, Dong-Kuk,Park, Kang-Chul 한국건축역사학회 2007 건축역사연구 Vol.16 No.4
In spite of the increasing significance on a scale of building measurement unit and its system having been used in many areas of architecture, only a few researchers carried out the studies on a specific period. It is even harder to find a research results dealt in view of architecture. This research gives a focus on different types of scales employed in the ancient buildings and their sites, based on the research results of unit scale or scales found in recent excavations. After the review of literature on the scales widely used in the ancient times and of the various types of scales excavated archeologically, a kind of scale unit system that had been widely and extensively employed throughout the period of 'Three Kingdoms' could be revealed. The scale system is possibly able to be applied to estimate the exact scale of buildings and their sites as well in that era. The research results show that the scale and its system employed in the East and West buildings and their sites of 'Kum-dang' in 'Mi-ruk Sa' temple are different from 'Kokuryo' scale that was believed in to be used in the temple. Contrary to the suggestion by excavation report on the type of scale employed in the buildings their sites, a scale of 29 centimeters, similar to that of Tang, was employed. It was also found that one module consists of three 'Chuk's of 88.8 centimeters. Based on this scale system, we could conclude that three modules of the buildings on the front and two and half modules of them on the sides were explained by this scale and its system.