JVSS 2023

Presentation information

Oral Presentation

[1Dp01-09] Surface Science(SS1) Physical Property

Tue. Oct 31, 2023 2:00 PM - 4:30 PM D: Room221 (2F)

Chair:Wilson Agerico Diño(Osaka University), Satoru Ichinokura(Tokyo Institute of Technology)

3:30 PM - 3:45 PM

[1Dp06] Probing copper and copper-gold surfaces with space- quantized oxygen molecular beams

Yasutaka TSUDA1, Jessiel Siaron GUERIBA2, Hirokazu UETA3, *Wilson Agerico Diño2, Mitsunori KURAHASHI4, Michio OKADA5,6 (1. Materials Sciences Research Center, Japan Atomic Energy Agency, 2. Department of Applied Physics, Osaka University, 3. Advanced Science Research Center, Japan Atomic Energy Agency, 4. Center for Basic Research on Materials, National Institute for Materials Science, 5. Department of Chemistry, Osaka University, 6. Institute for Radiation Sciences, Osaka University)

The orientation and motion of reactants play important roles in reactions. The small rotational excitations involved render the reactants susceptible to dynamical steering, making direct comparison between experiments and theory rather challenging. Using space-quantized molecular beams, we directly probed the (polar and azimuthal) orientation dependence of O2 chemisorption on Cu(110) and Cu3Au(110). We observed polar and azimuthal anisotropies on both surfaces. Chemisorption proceeded rather favorably with the O−O bond axis oriented parallel (vs perpendicular) to the surface and rather favorably with the O−O bond axis oriented along [001] (vs along [-110]). The presence of Au hindered the surface from further oxidation, introducing a higher activation barrier to chemisorption and rendering an almost negligible azimuthal anisotropy. The presence of Au also prevented the cartwheel-like rotations of O2.

Abstract password authentication.
Password is required to view the abstract. Please enter a password to authenticate.

Password