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TTIP/TEOA 혼합용액을 이용한 Au/TiO<sub>2</sub> Core-Shell 구조 나노입자 합성
권현우,임영민,유연태,Kwon, Hyun-Woo,Lim, Young-Min,Yu, Yeon-Tae 한국재료학회 2006 한국재료학회지 Vol.16 No.8
On the synthesis of Au/$TiO_2$ core-shell structure nanoparticle, the effect of concentration of $Ti^{4+}$ and reaction temperature on the morphology and optical property of Au/$TiO_2$ core-shell nanoparticles is examined. A gold colloid was prepared by $HAuCl_4{\cdot}4H_2O\;and\;C_6H_5Na_3{\cdot}2H_2O$. Titanium stock solution was prepared by mixing solution of titanium(IV) isopropoxide (TTIP) and triethanolamine (TEOA). The concentrations of $Ti^{4+}$ stock solution were adjusted to $10.01{\sim}0.3$ mM, and then the gold colloid is added to the $Ti^{4+}$ stock solution. Au/$TiO_2$ core-shell structure nanoparticles could be prepared by the hydrolysis of the $Ti^{4+}$ stock solution at $80^{\circ}C$. The size of synthesized Au nanoparticles was 15 nm. The thickness of $TiO_2$ shell on the surface of gold particles was about 10 nm. The absorption peak of synthesized Au/$TiO_2$ core-shell nanoparticles shifted towards the red end of the spectrum by about 3 nm because of the formation of $TiO_2$ shell on the surface of gold particles. The good $TiO_2$ shell is produced when $Ti^{4+}$ concentration is varied between 0.01 and 0.05 mM, and reaction temperature is maintained at $80^{\circ}C$. The crystal structure of $TiO_2$ shell was amorphous.
골재 혼입 유무에 따른 고온 수열 콘크리트의 압축강도와 B3B 휨강도 상관성 검토
권현우 ( Kwon Hyun-woo ),임창민 ( Lim Chang-min ),김민혁 ( Kim Min-hyouck ),김영민 ( Kim Young-min ),이건철 ( Lee Gun-cheol ),허영선 ( Heo Young-sun ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
In this study, the correlation between the compressive strength and the B3B bending strength of the high-temperature hydrothermal concrete according to the presence or absence of aggregate incorporation was examined. As a result of the experiment, as the heating temperature increases, the strength decreases and shows a high correlation.
일렉트로닉 댄스음악(Electronic Dance Music) 분석 방법에 대한 연구: 달파란의 <휘파람 코믹 댄스 파티>를 중심으로
권현우(Kwon Hyun-woo) 한국대중음악학회 2017 대중음악 Vol.- No.20
1980년대 미국의 시카고를 중심으로 탄생한 하우스음악은 테크노와 함께 영국을 거쳐 1990년대 전 세계 주류 음악으로 부상하였다. 하우스, 테크노, 레이브, 트랜스 등 일렉트로닉 댄스음악은 영국, 미국뿐만 아니라 한국의 대중음악에까지 영향을 미치며 한국 대중음악 차트를 점령하였다. 한국에서의 하우스 및 테크노 등 어법을 따른 본격적인 일렉트로닉 댄스음악은 1990년대 후반 홍대 클럽을 중심으로 한 DJ들에 의해 만들어지기 시작하였다. 일렉트로닉 댄스음악은 클럽문화와 함께 성장하면서 상업적 이미지와 마약 등 향락적 문화 이미지가 더해져 저급한 문화로 취급받기도 하였다. 이러한 이유로 일렉트로닉 댄스음악은 대중음악 연구에서 외면당해온 것이 사실이다. 본 논문에서는 음악 분석을 중심으로 한 일렉트로닉 댄스음악 분석 방법에 대해 연구하였다. 일렉트로닉 댄스음악에 대한 범위와 기존 분석 방법을 형식, 리듬, 음색적 측면으로 살펴보고 이러한 분석 방법을 한국 일렉트로닉 댄스음악 형성 초기 작품인 달파란의 <휘파람 코믹 댄스 파티>에 적용하였다. 적용 결과 곡의 고유의 특징과 일렉트로닉 댄스음악으로서의 장르적 특징 등을 확인할 수 있었으나 분석에 한계는 존재하였다. 현재 한국 대중음악의 한 축을 담당하고 있는 일렉트로닉 댄스음악에 대한 연구는 앞으로 다가올 새로운 대중음악 연구에 새로운 방향을 제시할 것이다. House music which was born in Chicago in the United States in the 1980s became a mainstream music through UK along with Techno. Electronic dance music such as House, Techno, Rave, and Trance had influenced Korean pop music as well as the United Kingdom and the United States, and had occupied tqhe Korean pop charts. In Korea, electronic dance music following the syntax of House and Techno began to be produced by DJs who actively played music in the Hong-dae Clubs. Electronic dance music grew along with the club culture. Electronic dance music was once treated as a low grade culture as it grew with club culture and drug addiction image was added to its commercial image. For this reason, it is true that electronic dance music has been neglected in popular music research. In this paper, electronic dance music analysis method focusing on music analysis was studied. The scope of the electronic dance music and the existing analysis method were examined in terms of form, rhythm, and timbre, and this analysis method was applied to the <Whistle Comic Dance Party> of DALPARAN, one of the earliest Korean electronic dance music works. As a result, the unique characteristics of the song and the genre characteristics of the electronic dance music were identified. But there were some limitations in the analysis. The study of electronic dance music, which currently plays an important part of Korean popular music, will present a new direction for the study of new popular music in the future.