XPS study of the early stages of deposition of Ni, Cu and Pt on HOPG

Chemical and morphological characterizations of CoNi alloy nanoparticles formed by co-evaporation onto highly oriented pyrolytic graphite

“…Here, we present our results on CoNi nanoparticle alloys formed by co-evaporation on the HOPG surface. HOPG has been widely used in the study of supported metal nanoparticles [12][13][14][15], because it has a well-defined, conducting surface, whose structure is well understood; it is similar to those of a number of novel carbon materials [16,17], such as carbon nanotubes (CNTs) and carbon fibers, which are widely used as substrates in many applications (e.g. fuel cells) [18][19][20][21].…”

Nickel evaporation in high vacuum and formation of nickel oxide nanoparticles on highly oriented pyrolytic graphite. X-ray photoelectron spectroscopy and atomic force microscopy study

“…X-ray photoelectron spectroscopy (XPS) study of early stages of nickel deposition on HOPG by sputtering under partial pressure of O 2 b 2 · 10 − 7 Pa [12] shows cluster growth (Volmer-Weber mechanism). The same result was found in low-energy ion beam deposition [13].…”

Volumetric distribution of Pt nanoparticles supported on mesoporous carbon substrates studied by X-ray photoelectron spectroscopy depth profiling

“…Although the mechanism of electronic interactions between the Pt and the supporting carbons remains an active area of research [33,34], it has been found that the core-level Pt4f 7/2 peak shifts from $71.2 eV for the bulk Pt surface to high binding energy with decreasing particle size [26,27,[35][36][37][38][39]. It has been shown that the chemical shifts of Pt clusters containing 1, 2, and 6 atoms are approximately +2.0, +1.5, and +1.3 eV, respectively [26].…”