Tarnished silver–copper surfaces reduction using remote helium plasma at atmospheric pressure studied by means of high-resolution synchrotron x-ray photoelectron microscopy

Plasmon‐Assisted Operando Self‐Healing of Cu2O Photocathodes

“…However, since the treatment is performed in open air, absorbed water by the surface speeds up the electroreduction process by hydrogen intercalation. The reduction process induces a surface reorganization letting the clustering of the metallic phase [ 38 ] and the release of gaseous species. The new surface, therefore, appear with hills and craters as the surface of a sponge.…”

Application of low-temperature plasma for the removal of copper chloride layers on bronze Wares

“…The crystalline phases of the corrosion sheet sample (copper foil covered by corrosion layer) were determined by X-ray diffraction (XRD Rigaku Smartlab 9) with Cu Kα radiation (λ = 1.5406 Å) and the assignment of phases was based on the JPDS powder diffraction cards [24]. According to many specialists, X-ray photoelectron spectra (XPS) of the samples were determined using an ESCALAB 250 + instrument (Thermo Fischer, EACALAB 250Xi) to obtain the valence, and calibration was carried out by C1s peak (binding energy = 284.8 eV) [12,28,29]. The XPS analysis areas is a circular area with diameter of 400 μm.…”

“…Plasma cleaning is a surface treatment technology, a corrosion layer usually still exists even after the plasma treatment [22,28]. To figure out the depth penetration of the treatment, the cross-sectional SEM image and EDS linear scan of Cl were carried out.…”