title: Fourth-order coherent Raman spectroscopy of liquid-solid interfaces: near-surface phonons of TiO2 (110) in liquids.
abstract: The fourth-order coherent Raman response of a TiO2 (110) surface covered by HCl aqueous solution, neat octanol, acetic acid, or carbon tetrachloride layers is acquired. Four fourth-order optical responses were identified at 837-826, 452-448, 371-362, and 184-183 cm(-1) and assigned to near-surface phonons of TiO2. A third-order response produced in the bulk liquid layer was superimposed on the fourth-order response, when coherent vibrations are efficiently excited in the layer.
authors.affiliation: Molecular Photoscience Research Center, Kobe University, Rokkodai, Nada, Kobe, 657-8501, Japan. nomoto@kobe-u.ac.jp
authors.forename: Tomonori
authors.initials: T
authors.lastname: Nomoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Onishi
mesh_terms: D019342:Acetic Acid / Q000737:chemistry; D002251:Carbon Tetrachloride / Q000737:chemistry; D006851:Hydrochloric Acid / Q000737:chemistry; D016011:Normal Distribution; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods*; D014025:Titanium / Q000737:chemistry*
chemical_list: D012997:Solvents; C009495:titanium dioxide; D002251:Carbon Tetrachloride; D014025:Titanium; D019342:Acetic Acid; D006851:Hydrochloric Acid