Abstract
Experiments have been carried out on propionate and formate adsorbed on clean and regulatively oxidized Ni(100) surfaces to scrutinize the notion that the polarization characteristics of infrared-visible sum frequency generation (SFG) signals of molecules on metallic surfaces are different from those due to molecules on insulating surfaces. Both propionate and formate give signals only for p-polarized visible pulses on clean metal and oxygen-saturated surfaces, but signals due to s-polarized visible pulses appeared from the propionate-covered surface as soon as the surface was covered with a monolayer of NiO(100). Vibrational peaks of propionate were located at 2887, 2945, and 2988 cm-1 and were assigned to the symmetric stretching mode of CH2 group, the symmetric stretching mode of CH3 group, and the degenerate stretching mode of CH3 group, respectively. The peak of the surface formate was located at 2948 cm-1 on the clean metal surface, but another band appeared at 2860 cm-1 on oxide-layered surfaces. The causes of the appearance of the (sp) polarization signals by the presence of the NiO layer are discussed.
| Original language | English |
|---|---|
| Journal | Surface Science |
| Volume | 416 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Oct 19 1998 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry
Cite this
Polarization characteristics from SFG spectra of clean and regulatively oxidized Ni(100) surfaces adsorbed by propionate and formate. / Yuzawa, Tetsuo; Shioda, Tatsutoshi; Kubota, Jun; Onda, Ken; Wada, Akihide; Domen, Kazunari; Hirose, Chiaki.
In: Surface Science, Vol. 416, No. 1-2, 19.10.1998.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Polarization characteristics from SFG spectra of clean and regulatively oxidized Ni(100) surfaces adsorbed by propionate and formate
AU - Yuzawa, Tetsuo
AU - Shioda, Tatsutoshi
AU - Kubota, Jun
AU - Onda, Ken
AU - Wada, Akihide
AU - Domen, Kazunari
AU - Hirose, Chiaki
PY - 1998/10/19
Y1 - 1998/10/19
N2 - Experiments have been carried out on propionate and formate adsorbed on clean and regulatively oxidized Ni(100) surfaces to scrutinize the notion that the polarization characteristics of infrared-visible sum frequency generation (SFG) signals of molecules on metallic surfaces are different from those due to molecules on insulating surfaces. Both propionate and formate give signals only for p-polarized visible pulses on clean metal and oxygen-saturated surfaces, but signals due to s-polarized visible pulses appeared from the propionate-covered surface as soon as the surface was covered with a monolayer of NiO(100). Vibrational peaks of propionate were located at 2887, 2945, and 2988 cm-1 and were assigned to the symmetric stretching mode of CH2 group, the symmetric stretching mode of CH3 group, and the degenerate stretching mode of CH3 group, respectively. The peak of the surface formate was located at 2948 cm-1 on the clean metal surface, but another band appeared at 2860 cm-1 on oxide-layered surfaces. The causes of the appearance of the (sp) polarization signals by the presence of the NiO layer are discussed.
AB - Experiments have been carried out on propionate and formate adsorbed on clean and regulatively oxidized Ni(100) surfaces to scrutinize the notion that the polarization characteristics of infrared-visible sum frequency generation (SFG) signals of molecules on metallic surfaces are different from those due to molecules on insulating surfaces. Both propionate and formate give signals only for p-polarized visible pulses on clean metal and oxygen-saturated surfaces, but signals due to s-polarized visible pulses appeared from the propionate-covered surface as soon as the surface was covered with a monolayer of NiO(100). Vibrational peaks of propionate were located at 2887, 2945, and 2988 cm-1 and were assigned to the symmetric stretching mode of CH2 group, the symmetric stretching mode of CH3 group, and the degenerate stretching mode of CH3 group, respectively. The peak of the surface formate was located at 2948 cm-1 on the clean metal surface, but another band appeared at 2860 cm-1 on oxide-layered surfaces. The causes of the appearance of the (sp) polarization signals by the presence of the NiO layer are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0032180929&partnerID=8YFLogxK
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U2 - 10.1016/S0039-6028(98)00625-6
DO - 10.1016/S0039-6028(98)00625-6
M3 - Article
AN - SCOPUS:0032180929
VL - 416
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1-2
ER -