Synchrotron infrared spectroscopy of water adsorbed on polycrystalline gold

Autor:	Graham A. Bowmaker, C. A. Melendres, C. Liu, B. Beden, V. A. Maroni
Rok vydání:	1993
Předmět:	Chemistry Bremsstrahlung Analytical chemistry Infrared spectroscopy Synchrotron radiation Surfaces and Interfaces Condensed Matter Physics Synchrotron Spectral line law.invention Transition metal Isotopic shift law Electrochemistry General Materials Science Crystallite Spectroscopy
Zdroj:	Langmuir. 9:1980-1982
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la00032a013
Popis:	Synchrotron infrared spectra of H[sub 2]O adsorbed on a polycrystalline gold surface have been obtained for the first time. Water was found to adsorb molecularly and associatively on gold at low temperatures, i.e., 100-140 K. For example, at 117 K and exposure of 0.3 langmuirs, the O-H stretching vibration was observed at 3387 cm[sup [minus]1], which is indicative of hydrogen-bonded surface water. Bands attributed to frustrated translation were observed at about 230 and 290 cm[sup [minus]1]; a band at 817 cm[sup [minus]1] was assigned to frustrated rotational motion. The assignments were confirmed through isotopic shift measurements with D[sub 2]O. The observed spectra are suggestive of the formation of (HOH)[sub n] clusters at low coverage; with increasing coverage, the formation of an ordered multilayer with an icelike structure is apparent. 14 refs., 5 figs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3112ae723d24e74cc392c9cf66eaa1ef https://doi.org/10.1021/la00032a013 Zobrazit plný text záznamu