Session V32: Surface Reactions and Dynamics
8:00 AM–11:00 AM, Thursday, March 18, 2010
Sponsoring Unit: DMP
Chair: Alexey Zayak, Lawrence Berkeley National Laboratory
Abstract ID: BAPS.2010.MAR.V32.3
Abstract: V32.00003 : Surface Reactions following Ultrafast Substrate Excitation: A Path towards Atomic Scale Resolution of High-Temperature Reactions at Metal Surfaces?
8:24 AM–8:36 AM
The diffusion of CO molecules on a copper surface triggered by femtosecond optical excitations was monitored by means of a low temperature scanning tunnelling microscope (LT-STM). The method uses an experimental setup including an amplified Ti:Sa oscillator providing ~85 fs laser pulses at 800nm, which are subsequently frequency-doubled. The optical system is rigidly coupled to an LT-STM. This work follows initial demonstration of ~the desorption and the anisotropic diffusion dynamics of CO molecules on a Cu (110) surface at a fixed laser fluence. Our adsorbate/substrate model is intended as a starting point in unveiling the energy transfer mechanism underlying picosecond and femtosecond surface processes that occur under equilibrium conditions.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.V32.3