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Proceedings Paper

Vibrational broad bandwidth and scanning sum frequency generation spectroscopy of air-solid and air-liquid interfaces
Author(s): Gang Ma; Dingfang Liu; Heather C. Allen
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Paper Abstract

The adsorption of organics from the gas phase to solid and liquid surfaces is of great interest in the environment. In this study, the surface vibrational spectra of piperidine at the air/liquid interface, air/alumina (a-Al2O3, corundum) (0001) interface and air/a-alumina powder interface were obtained by using vibrational broad bandwidth sum frequency generation (SFG) spectroscopy. The interfacial vibrational signatures in the C-H stretching region of piperidine at the air/liquid and air/solid interfaces are shown to be sensitive spectroscopic-probes revealing the dominating interfacial species. Results indicated that the interfacial species at the air/water interface is mainly hydrogen-bonded piperidine, the interfacial species at the air/alumina (0001) interface is mainly protonated piperidine (piperidium) and the interfacial species at the air/alumina powder interface is mainly liquid-like piperidine.

Paper Details

Date Published: 14 October 2004
PDF: 12 pages
Proc. SPIE 5513, Physical Chemistry of Interfaces and Nanomaterials III, (14 October 2004); doi: 10.1117/12.558707
Show Author Affiliations
Gang Ma, The Ohio State Univ. (United States)
Dingfang Liu, The Ohio State Univ. (United States)
Heather C. Allen, The Ohio State Univ. (United States)


Published in SPIE Proceedings Vol. 5513:
Physical Chemistry of Interfaces and Nanomaterials III
Gregory V. Hartland; Xiao-Yang Zhu, Editor(s)

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