Plasma-assisted oxidation of Cu(100) and Cu(111)

Abstract

A low-pressure oxygen plasma oxidized Cu(100) and Cu(111) surfaces at room temperature. The time-dependent evolution of surface structure and chemical composition is reported in detail for a range of exposure times up to 30 min.

Accessing complex reconstructed material structures with hybrid global optimization acceleratedviaon-the-fly machine learning

“…5(h and i) show that the oxidized Cu(100) forms via the creation of the Cu–O chain that resembles the bulk Cu 2 O. 89 Experimentally, a Cu 2 O signal has been observed during the initial oxide growth of Cu(100) 90 along with the missing-row reconstruction (MRR) in Fig. 5(g), 82,91,92 which is consistent with the simulated STM image based on our optimized structure.…”

Surface charge dynamics on air-exposed ferroelectric Pb(Zr,Ti)O3(001) thin films

“…The LEED pattern proves the single crystal character of the film and the sharp spots demonstrate a large crystalline domain size. 14,34,38 The pattern designates the (1 × 1) structure of the (100) orientation, as was already reported on clean PZT surfaces, 14,34 but it is remarkable that it is preserved even after long storage in air, even though the spot intensity is low. This indicates that air contamination (usually with carbon containing molecules) 27 did not occur extensively.…”

“…In the case of conducting surfaces, this energy is simply understood as the sample WF, Φ sample . 38,40 In general, the equation E kin + Φ sample = eV sample + Φ e-gun is valid in all the cases. On the other hand, in the current study, the high MEM-LEEM transition values indicate that the potential barrier is significantly higher on fresh areas (red curve), influenced by the negative charge accumulated on the surface in air in order to stabilize FE domains 9 (Fig.…”

Plasma Oxidation of Copper: Molecular Dynamics Study with Neural Network Potentials

“…Some clarification is due in relation to a recent contribution by Kunze et al ., where in situ observation of plasma oxidation of single-crystal copper metal at room temperature was reported. In their experiments on Cu (100), only Cu 2 O was observed initially, and only prolonged exposure leads to a “sandwich” structure of CuO, Cu 2 O, and Cu.…”