Ab initio Calculations of Protonated Ethylenediamine-(water)3 Complex: Roles of Intramolecular Hydrogen Bonding and Hydrogen Bond Cooperativity

부두완,Bu, Du Wan Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.7

Ab initio density functional calculations on the structural isomers, the hydration energies, and the hydrogen bond many-body interactions for gauche-, trans-protonated ethylenediamine-(water)3 complexes (g-enH+(H2O)3, t-enH+(H2O)3) have been performed. The structures and relative stabilities of three representative isomers (cyclic, tripod, open) between g-enH+(H2O)3 and t-enH+(H2O)3 are predicted to be quite different due to the strong interference between intramolecular hydrogen bonding and water hydrogen bond networks in g-enH+(H2O)3. Many-body analyses revealed that the combined repulsive relaxation energy and repulsive nonadditive interactions for the mono-cyclic tripod isomer, not the hydrogen bond cooperativity, are mainly responsible for the greater stability of the bi-cyclic isomer.

[테마기획 - N-BT 융합기술] Bio-AFM 기술의 최근 동향과 전망

부두완 대한기계학회 2004 기계저널 Vol.44 No.10

Surface-enhanced Raman Scattering(SERS) of Benzylcyanide in Silver Sol

부두완,김관,김명수,Boo Doo Wan,Kim Kwan,Kim Myung Soo Korean Chemical Society 1988 Bulletin of the Korean Chemical Society Vol.9 No.1

The surface-enhanced Raman scattering(SERS) of benzylcyanide in a silver sol was investigated. It was concluded that the molecule adsorbed onto the silver surface via the ${\pi}$ system of the CN group. The molecule was assumed to coordinate with either a single atom or two silver atoms. According to the SERS selection rule, the benzene ring of the adsorbed species seemed to assume a flat stance with respect to the silver surface.

Biological Applications of AFM: Molecular Recognition Force Microscopy for Studying Biomolecule Interactions at Single Molecular Level

부두완 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1

In the past decade, the development of experimental tools allowing the precise application and measurement of weak forces has opened new perspectives in material and life sciences. Mechanical experiments with single molecules have become possible, and for the first time fundamental intramolecular and intermolecular interactions could be studied directly at the single molecular level. One of these important techniques is molecular recognition force microscopy (MRFM). It was developed as one of the chemical force microscopic (CFM) techniques permitting the study of specific interactions between molecules, and between residues composing a large molecule. In this talk, I will introduce the theoretical backgrounds and experimental manifestations of the MRFM technique, then discuss briefly the applications of MRFM to the studies of protein-protein, carbohydrate-protein, DNA-DNA interactions.

과학관 건립 타당성 평가항목의 특화평가영역 필요성 연구

부두완(Boo, Doo Wan),현혜정(Hyun, Hye Jung) 한국전시산업융합연구원 2013 한국과학예술융합학회 Vol.12 No.-

국내 국립과학관이 선진과학관에 비해 매우 부족함에 따라 정부는 과학관 육성기본계획을 통해 국가적 전략 투자로 과학관 확충사업을 시작하였다. 그에 일환으로 2013년 대구와 광주에 국립종합과학관이 개관될 예정이다. 국립과학관 건립을 위한 타당성 조사 용역서를 보면 시대가 변하고 지역에 따라 특성이 다름에도 불구하고, 과학관마다 기초적, 경제적, 정책적 분석에서 동일한 방식으로 타당성 평가조사를 진행하고 있다. 과학관을 건립할 때 지역적 특색과 과학관 건립으로 인해 파생되는 지역적 연관산업, 지역기업문화 및 일자리 창출, 고용안정 등의 무형의 사회적 자산가치(시너지 효과)에 대해 함유된 분석이 우선시 되어야 함에도 불구하고, 경제적 수치와 정책적 엄격한 기준, 정치적 이해관계에 얽매여 평가되고 있다. 이러한 평가기준은 과학관 건립에도 방해요소로 작용하여 원활한 건립추진을 하는데 어려움이 많다. 우리나라 과학관이 세계의 과학관과 비교할 수 있는 위치까지 도달하기 위해서 과학관의 건립요건 척도인 타당성 검토의 새로운 척도를 만들어 다양하고 고른 지역에서 과학관을 건립해야 하며, 주요 특화된 분야에 대한 타당성 평가항목이 새롭게 정립되고, 효율성 제고조건을 위한 새로운 평가기준이 마련되어야 할 필요성이 있다. 그렇게 건립된 과학관에서, 아이들은 과학의 참 의미와 재미를 느끼고 향후 미래의 과학자가 될 수 있도록 관심을 가질 수 있을 것이다. 그리고 나아가 과학·이공계분야 및 과학관 관련 종사자들에게는 일자리 창출과 더불어, 그 지역이 갖고 있는 산업과 문화의 틀 속에서 오랜 숙련으로 고용승계와 고용안정, 그리고 지역균형발전까지 이루어 질 수 있을 것이다. As domestic national science museum has not been developed than science museum in developed countries, the government started to expand science museum as a national strategic investment through basic plan to cultivate science museum. As part of such planning, national science museum is scheduled to open in Daegu and Gwangju in 2013. Regarding service contract for survey of validity for foundation of national science museum, though era changes and characteristics vary according to region, assessment survey of validity is proceeded with in a same way in basic, economic, policy analysis in every science museum. When science museum is built, regional characteristics and analysis on intangible social value as assets(synergy effect) such as regional related industry, regional corporate culture and creation of job, employment stability etc. which are derived from foundation of science museum should be given priority. But assessment is bound to economic figure, strict criterium in policy, and political interest. Such assessment criteria function as disturbing elements in foundation of science museum so that there are many difficulties for fluent progress of construction. For our science museum to reach level of other advanced science museum in the world, new scale to check validity which is a scale of construction requirement should be made to build science museum in various places considering regional balance, assessment items for validity about main specialized fields should be newly established, and it is necessary to arrange assessment criteria for condition to improve efficiency. In the science museums, children can feel real meanings and fun of science and they may have interests so that they can become scientist in the future. Furthermore, for employees related to fields of science and engineering, and science museum, job can be created. And employment succession, employment stability, and balanced development of region are possible through long expertness in the midst of frame of industry and culture that the region has.

국립종합과학관의 콘텐츠 확보를 위한 전시의 주기적 교체방안 연구

부두완(Boo, Doo Wan),박주용(Park, Joo Yong),김경훈(Kim, Kyung Hoon) 한국전시산업융합연구원 2011 한국과학예술융합학회 Vol.9 No.-

급속한 과학기술의 발전 속도에 비해, 국내 종합 과학관들의 전시물 교체주기는 길고, 교체 순서는 산발적(散發的)이며, 예산의 효율적 활용이 이루어지지 못해, 전시품들의 시의성(時宜性)이 과학기술의 발전 속도를 따라가지 못하고 있다. 이는 과학관의 기본 기능인 전시 및 교육기능을 원활하게 수행하지 못한다는 것을 의미하여, 2010년 국회는 이런 문제성을 인지하고, 과학관의 자율성을 보장하고 예산의 효율적 활용을 도모 하고자, 과학관의 법인화를 추진하는 법령을 발의 하였으나, 이는 국내의 여건을 고려하지 않은 발의라는 비판을 받았다. 하지만 과학관의 법인화 추진은 과학관의 자율성 보장과 예산의 효율적 활용이라는 점에서는 과학관이 과학관의 기본 기능을 수행하고 발전시키는데, 지금의 형식보다 효율적임은 외국의 사례를 통해서도 충분히 검증되고 있다. 이에 선행 조사 결과, 과학관 법인화를 현재 국내 과학관에의 적용함에 있어서 예상되는 다양한 문제점이있다. 하지만 그중 가장 큰 문제점은 만약 국내 종합과학관이 법인화 추진 이전에 충분한 예산 자립도를 확보하지 못하게 되면 과학관의 자율성 보장을 목표로 했던 법인화 추진의 결과는 과학관이 국민에게 자립을 위한 비용 부담을 전가하는 상황을 유발하게 되고, 이는 모든 국민에게 공평하게 과학을 접할 수 있는 기회를 박탈하는 현상을 초래하게 될 수 있다는 것이다. 이에 따라 본 연구에서는 국내 과학관의 법인화에 가장 큰 걸림돌이라 생각되는 예산의 자립도 문제를 해외 과학관과 국내 과학관의 예산의 집행 분야를 비교 분석하여 국내 국립 과학관의 운영방식이 장기적인 예산자립도 향상에 목표를 두지 않고, 유지·관리하는데 초점이 맞춰져 있음을 유추해 냈다. 이런 운영 방식은 김찬종1)이 규정한 과학관의 7개의 기능 중, 연구기능의 부실함으로 인한 것이며 이는 과학관으로 하여금 전체 체험물 기획 및 제작을 외부 전문가에 의존하게 하여, 과학관의 자체 콘텐츠 확보 및 누적을 불가하게 함으로써, 과학관 자체 콘텐츠의 융,복합을 통한 새로운 콘텐츠의 재생산으로 이루어지지 못하는, 즉 일련의 인과적인 발전저하를 초래하고 있다는 결과를 얻게 되었다. 본 연구에서는 이 일련의 연구 과정으로부터 과학관의 연구기능 활성화를 위한 최소한의 요소와 교체 모델을 설정하여 현 연구의 한계점 내에서 목표에 근접한 교체 방안의 모델 제시를 목표로 한다. 이 모델은 차후 추가 연구를 통하여 좀 더 적합한 모델로서의 역할을 하게 될 것으로 기대되며, 이것은 추가적인 연구를 통해 점진적으로 과학관 자립화에 큰 역할을 할 것으로 기대된다. Compared to the rapid developments of the scientific technology, displays in domestic science museums do not appear to keep up with such quick changes. The museums hardly upgrade the displays and even if they do, they only concentrate on a few things now and then. The careless budget management of the museums has the displays fall behind the rapid pace of scientific technology developments. This, in other words, indicates that the science museums do not perform their basic responsibilities such as exhibition and education. In 2010, National Assembly finally recognized the problem and legislated a law to incorporate the science museums. But, this did not succeed with criticisms of the legislation"s not considering the domestic circumstances. Incorporating of the science museums is believed to be worth doing in that it secures the autonomy of the science museum as well as the efficient use of the budget. Cases in foreign countries have also proved that incorporation would make the science museums focus on their basic resp onsibilities and developments. However, advanced researches said that even though the domestic science museums are incorporated, if they fail to have a self-reliance of budget beforehand, they will end up with asking the people for expenses. This would take away rights of people to experience the science. In consideration of such problem with the self-reliance of budget which is considered the biggest problem of the domestic science incorporation, the study analyzed budget managements of overseas science museums and the domestic science museums. After the research, the study figured out that the domestic science museums have been always focusing on the maintenance of the budget but not trying for how to improve the self-reliance in the long term. The problem in the budget management occurred as the science museum has not been capable of performing the research responsibility of their 7 duties that Kim, Chan-jong(2009) had defined. This, in conse quence, made the science museums rely on experts outside when working on exhibition projects and production. Such circumstance prevented the science museums from securing their own contents which has led to consecutive failures of creating new contents based on combinations of the contents that the museums have for themselves. From the research procedures above, the study sets up a replacement model and minimum factors to revitalize the research function of the science museum, aiming to offer a model which is the most satisfied to this project with the limits still considered. The model will play its role even better after follow-up researches while it is expected to be a great contribution to the self-reliance of the science museum.

Determination of Doping Density in GaAs Semiconductor by Wavelength-Dependent Photoacoustic Spectroscopy

임종태,최옥림,부두완,최중길 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.5

The wavelength dependence of the photoacoustic signal for n-type GaAs semiconductors in the region of the band-gap energies was investigated. The significant changes in the phase and amplitude of the photoacoustic signal near the band-gap absorption wavelengths were observed to occur when the Si-doping densities in GaAs were varied. Particularly, the first derivatives of the photoacoustic phase vs. wavelength graphs were evaluated and fitted with single Gaussian functions. The peak centers and the widths of the Gaussian curves clearly showed linear relationships with the log values of the Si-doping densities in n-type GaAs semiconductors. It is proposed that the wavelength-dependent PA spectroscopy can be used as a simple and nondestructive method for measuring the doping densities in bulk semiconductors.

Ab initio Study on Structures, Energies and Vibrations of Methylammonium-(water)$_n$ (n=1-3) Complexes

김광연,조융인,부두완,Kim, Gwang Yeon,Jo, Yung In,Bu, Du Wan Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.6

The reaction of [(2-N,N-dimethylaminomethyl) pheny] methylvinychlorosiane with t-BuLi in hexane solvent gave dimers, five isomeric 1,3-disilacyslobutanes which were weparated and charaterized. In trapping experiments with various trapping agents, no corresponding silene-trapping aduct was observed. We suggest that more important species for the formation of five isomeric dimers might be the zwitterionic species generated by virtue of intramolecular donor atom rather than the silene.

화학기상증착법을 이용한 h-BN의 성장과 그 특성

서은경,김성진,김원동,부두완,황찬용 한국진공학회 2012 한국진공학회 학술발표회초록집 Vol.2012 No.8

Separation of Nanoparticles in Different Sizes and Compositionsby Capillary Electrophoresis

Won-MiHwang,최중길,부두완 대한화학회 2003 Bulletin of the Korean Chemical Society Vol.24 No.5