Growth of Zinc on Clean and Oxygen-Precovered Cu(110)

Abstract

Growth of Zn on Cu(110) with and without the influence of oxygen was investigated by a combination of scanning tunneling microscopy, low-energy ion scattering, and low-energy electron diffraction in analogy to previous studies on growth and oxidation of Zn on Cu(111). Upon room-temperature deposition of submonolayer Zn films on Cu(110), a step-flow growth mode is observedpossibly accompanied by some intermixingwith Zn atoms adopting the fcc(110) structure of the copper substrate. Upon oxidation of submonolayer Zn films at temperatures around 400–500 K, ill-ordered clusters of oxidized zinc are formed, but the Cu(110) substrate becomes oxidized too. Room-temperature deposition of submonolayer amounts of Zn onto a partly oxidized “striped” Cu(110) surface results in partial destruction of the CuO stripes, formation of ZnO x clusters, and in addition growth of Zn “nanowires” with an fcc(110) structure on the clean copper stripes. On the fully developed (2 × 1)­O template, zinc atoms adopt a geometry reminiscent of the (2 × 1) reconstructed CuO surface.

Influence of Copper Surface Orientation on the Hydrogen-Bonded Assembly of 2-Methylbenzimidazole Molecules: A Comparative Study

“…The sample voltage was used as a reference for all gap voltages in the experiments. AFM measurements were conducted after a tip-modification process on a CuO/Cu(110) surface, following documented procedures. − The homemade AFM sensor, with a resonant frequency of 23 kHz and a quality factor of ∼2000, was set to oscillate at an amplitude of ∼200 pm for constant-height AFM imaging. AFM images were obtained with frequency shift (Δ f ) set-points between −13 and −3 Hz at a scanning speed of 10 nm/s and a resolution of 512 × 512 pixels.…”

Visualizing the gas-sensitive structure of the CuZn surface in methanol synthesis catalysis

“…Scanning tunneling microscopy (STM) has been applied to planar catalyst model systems to elucidate many atomic-scale aspects of surface structure and dynamics of surface reactions 35 , 36 , including work on CuZn alloys 37 – 40 , ZnO/Cu 27 , 41 – 43 and Cu/ZnO 44 – 47 . STM studies at elevated pressure conditions are referred to as near-ambient pressure STM (NAP-STM) (or ambient pressure/high-pressure STM) and offer the possibility to observe the structure of planar model systems in pressurized conditions that bridge the gap towards catalytic conditions 48 – 51 .…”