ELECTRON- AND PHOTON-INDUCED CHEMISTRY: RELEVANCE TO ENVIRONMENTAL REMEDIATION NEEDS
PPT Slide
Where theory can help in understanding electron-interactions with molecular solids…
RESONACE ENHANCED MULTIPHOTON IONIZATION (REMPI) AND TIME-OF-FLIGHT (TOF) TECHNIQUES
Temperature Dependence of DEA Resonances W. C. Simpson et. al. J. Chem. Phys. 107, 8668 (1997)
THRESHOLDS FOR THE ELECTRON STIMULATED DESORPTION (ESD) OF O+, H+ AND OH+ IONS FROM THE SURFACE OF CUBIC ZrO2 FOLLOWING EXPOSURE TO WATER VAPOR
ELECTRONIC STRUCTURE OF ZIRCONIUM OXIDE
EXPERIMENTAL
• HYDROGEN YIELDS FROM WATER ADSORBED ON DIFFERENT OXIDE SURFACE PLOTTED VS. OXIDE BAND GAP SHOW MAXIMUM NEAR 5 eV • 5.1 eV IS AN ENERGY OF H-OH BOND BREAKING IN WATER MOLECULE
•THE HIGHER G-VALUES (ɯ) ARE DUE TO EFFECTIVE ENERGY TRANSFER AT THE OXIDE-WATER INTERFACE •THE STANDARD G-VALUE DEFINITION HAS TO BE MODIFIED WHEN DISCUSSING RADIOLYSIS AT INTERFACES
MECHANISM OF THE ENERGY TRANSFER TO WATER MOLECULES:
RADIATION-INDUCED REACTIONS AT ORGANIC/NaNO3 INTERFACES
VELOCITY DISTRIBUTIONS FOR O (3P) AND NO (2?) FROM BOTH 100 eV ESD (OPEN CIRCLES) AND 6.4 eV PSD (FILLED CIRCLES)
SCHEMATIC OF THE PHOTON- AND ELECTRON- STIMULATED DESORPTION OF NO AND O FROM NaNO3 CRYSTALS
PROPOSED REACTION SCHEME FOR THE NaNO3 / CH3OH OVERLAYER EXPERIMENTS
Where theory can help in understanding electron-and photon-interactions with interfaces:
Email: thomas.orlando@pnl.gov
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