AVS 60th International Symposium and Exhibition
    Ions at Aqueous Interfaces Focus Topic Monday Sessions
       Session IA+AI+BI+IS+NL+SS-MoA

Invited Paper IA+AI+BI+IS+NL+SS-MoA1
Sum-frequency Vibrational Spectroscopy for Studies of Ions Emerging at Water Interfaces

Monday, October 28, 2013, 2:00 pm, Room 203 A

Session: Ions at Aqueous Interfaces
Presenter: Y.R. Shen, University of California, Berkeley
Correspondent: Click to Email

Ions at water interfaces can significantly change the chemical and physical properties, and hence the functionality, of the interfaces. They play a key role in many important processes in many disciplines. In recent years, sum-frequency vibrational spectroscopy(SFVS) has been demonstrated to be a unique, effective tool to study such interfaces. We discuss here SFVS investigations of ions at various water interfaces: soluble ions at air/water interfaces, ions attached to Langmuir monolayers on water, and hydrophilic and hydrophobic water interfaces. Formation of an electric double charge layer by ions near an interface usually occurs. It induces significant polar reorientation of interfacial water molecules and alters their vibrational spectra that can be detected by SFVS. Useful structural information can be deduced from the results, but work is still needed for complete understanding of the results.