AVS 57th International Symposium & Exhibition
    In Situ Microscopy and Spectroscopy Topical Conference Tuesday Sessions
       Session IS+SS-TuM

Invited Paper IS+SS-TuM3
Photoelectron Spectroscopy Under Humid Conditions

Tuesday, October 19, 2010, 8:40 am, Room Acoma

Session: In Situ Spectroscopy – Interfacial Chemistry/Catalysis
Presenter: H. Bluhm, Lawrence Berkeley National Laboratory
Correspondent: Click to Email
The interaction of water with surfaces plays a major role in many processes in the environment, atmosphere and technology. Weathering of rocks, adhesion between surfaces, and ionic conductance along surfaces are among many phenomena that are governed by the adsorption of molecularly thin water layers under ambient humidities. The properties of these thin water films, in particular their thickness, structure and hydrogen-bonding to the substrate as well as within the water film are up to now not very well understood. Ambient pressure photoelectron spectroscopy (APXPS) is a promising technique for the investigation of the properties of thin water films. We will discuss the basics of APXPS as well as the particular challenges that are posed by investigations in water vapor at Torr pressures, as well as show examples of the application of APXPS to the study of water films on metals and oxides.