Mass Transfer in Surface Chemical Processes: Adsorption, Faceting and Reaction on Ag(110)
Part of the
NATO ASI Series
book series (NSSB, volume 360)
Surface chemical processes generally involve the transfer of mass within a complex adlayer structure. Relating mass transfer in such complex systems to the underlying microscopic events is a formidable problem in surface chemical physics. We have used scanning tunneling microscopy (STM) to image mass transfer on Ag(110) and its vicinals in a variety of surface chemical processes. By investigating a broad range of phenomena on these surfaces, including self diffusion, adsorption, faceting, and reaction, we test and obtain a more comprehensive understanding of how mass is transferred within the complex surface chemical milieu. For these vicinal Ag(110) surfaces we find that mass exchange is highly efficient event at room temperature. The mechanisms for mass transfer do not appear unique, but new channels open, as needed, to satisfy the chemical potential balance and sustain mass transfer. For oxidation reactions on Ag(110), crystallographic steps and substrate reconstruction are key elements to the mass-exchange mechanisms.
KeywordsScanning Tunneling Microscopy Scanning Tunneling Microscopy Image Step Edge Mass Transfer Mechanism Oxygen Chain
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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