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With continuous-time imaging using a variable-temperature scanning tunneling microscope (STM), we observe the dynamic behavior of a bright species, which we believe to be single O 2 molecules on Si(111)-7 7 surfaces. We have found the hopping motion of this molecular species between neighboring adatom sites, which is mediated by two intermediate states. A model is proposed to explain the...
Scanning tunneling microscopy (STM) was used to study the oxidation of CO with O-precovered Cu(110) in the steady state at 400 K at the atomic level. There is a strong preference for CO to react with oxygen along the p(2 × 1) oxygen rows. The reaction appears to occur initially at the outer edge of an oxygen island, creating kink defects in the overlayer structure. Once created, these defects are...
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