서지주요정보
전기화학계에서의 표면증강 라만산란 : 은전극과 구리전극의 비교 = Surface enhanced raman scattering in electrochemical systems : silver vs. copper
서명 / 저자 전기화학계에서의 표면증강 라만산란 : 은전극과 구리전극의 비교 = Surface enhanced raman scattering in electrochemical systems : silver vs. copper / 하동한.
저자명 하동한 ; Ha, Dong-Han
발행사항 [서울 : 한국과학기술원, 1989].
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소장정보

등록번호

4105393

소장위치/청구기호

학술문화관(문화관) 보존서고

DAP 8911

SMS전송

도서상태

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반납예정일

초록정보

The potential dependence of Surface Enhanced Raman Scattering (SERS) intensity during Oxidation-Reduction Cycle (ORC) was studied in various electrochemical environments. Adatomic effect on SERS was confirmed from the characteristic variation of SERS intensities of pyridine, $Cl^-$ and continuum background from Ag and Cu electrodes during ORC. SERS was also affected by other resonance effects such as charge transfer and Surface Plasmon (SP) excitation as well as the number density of surface adsorbed molecules. SERS intensities and the observed frequencies of vibrational modes were changed slightly with incident wavelength, the species of metal and the electrochemical surface condition of electrodes. We have first observed above 40℃ the irreversible loss of SERS intensity from the Cu electrode in electrochemical system. Judging from the irreversible variation of SERS intensity and the reflectivity of Cu electrode surface near -1.45Vsce in nonfaradaic region, it is confirmed that there is significant adatomic effect on the reflectivity of the electrode surface as well as on SERS. Cu adatoms are also diffused away to the surface defects at higher temperature than Ag adatoms in electrochemical environment as in Ultra High Vacuum(UHV) environment. Especially the result that Cu adatoms diffuse away at temperatures elevated by 60K~70K in electrochemical environment than in UHV environment suggests that the mobility of adatom is decreased in solution by the formation of a surface complex with probe molecules, water molecules and other ions. Though Cu adatoms can stabilize Ag adatoms on the surface of Ag electrode at room temperature, they can not stabilize above 40℃ in electrochemical system, i.e Cu adatoms on the surface of Ag electrode have the same binding energy as on the surface of Cu electrode. Ag adatoms are considered to be diffused away to the surface defects along a channel approximately defined by the local minima of the potential energy surface.

서지기타정보

서지기타정보
청구기호 {DAP 8911
형태사항 v, 113 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Dong-Han Ha
지도교수의 한글표기 : 김종진
지도교수의 영문표기 : Jong-Jean Kim
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 109-113
주제 Raman effect.
Surface enhanced.
Copper.
Silver.
표면 증감. --과학기술용어시소러스
Raman 산란. --과학기술용어시소러스
전기 화학. --과학기술용어시소러스
구리. --과학기술용어시소러스
은. --과학기술용어시소러스
Electrochemistry.
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