COLL 425 |
| Y. Ron Shen, Physics Departement, University of California at Berkeley, Berkeley, CA 94720, Victor Ostroverkhov, Physics Department, University of California at Berkeley, Berkeley, CA 94720, and Glenn Waychunas, Earth Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720. |
| Selected beam geometry allows us to suppress the bulk contribution to sum-frequency generation from crystalline quartz and use sum-frequency vibrational spectroscopy to study water/alpha-quartz interfaces with different bulk pH values. The spectra are qualitatively similar to those of water/fused-quartz interfaces, but display an ice-like peak that resembles very closely that of a real ice surface, providing the first evidence to the belief that water molecules at a crystalline oxide surface form a more ordered hydrogen-bonding network. Work supported by the STC program of NSF under Agreement Number CTS-120978 |
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Vibrational Analyses of Dry and Wet Surfaces
2:00 PM-5:30 PM, Wednesday, March 31, 2004 Marriott -- Grand Ballroom H, Oral
Division of Colloid and Surface Chemistry |