Microstructure, Mechanical, and Tribological Properties of CN x Thin Films Prepared by Reactive Magnetron Sputtering

Reversible Oxygen Sensing Based on Multi-Emission Fluorescence Quenching

“…To get information on elemental composition and relative abundancy of functional groups for each hydrothermal product, we performed XPS on the U-PPD samples from 2 h to 16 h. XPS highresolution region scans confirmed the set of structures of the fluorescent products suggested by ESI-QTOF, namely urea precursors, polyaromatic urea units, unreacted and oligomerized PPD. Four different C1s signals located at 284.5 eV, 285.5 eV, 286.6 eV, and 288.5 eV were fitted and ascribed to C-C/C-H, C-N, C=N, and N-C=O in agreement with previous literature [36][37][38] ( Figure S4). The relative atomic concentration of carbon (C1s) remained constant (~71%) over the entire synthesis whereas nitrogen (N1s) concentration decreased by 7% as the reaction proceeded from 2 to 16 h, suggesting the elimination of nitrogen-rich volatile products, such as ammonia (Table S2).…”

“…This also confirms that the predominant urea-bonds formed between aromatic moieties are partly decomposed, resulting in PPD monomers that can subsequently form PPD trimers, thereby displaying different oxidative states for the nitrogen (Figure 1c). [36][37][38] (Figure S4). The relative atomic concentration of carbon (C1s) remained constant (~71%) over the entire synthesis whereas nitrogen (N1s) concentration decreased by 7% as the reaction proceeded from 2 to 16 h, suggesting the elimination of nitrogen-rich volatile products, such as ammonia (Table S2).…”

Iron oxide modified with pyridyl‐triazole ligand for stabilization of gold nanoparticles: An efficient heterogeneous catalyst for A3 coupling reaction in water

“…Moreover, the N 1 s core‐level spectrum confirms the presence of nitrogen by revealing a peak at 399.9 eV (Figure c) . The C 1 s XPS spectrum showed three peaks centred at 284.6, 286.4 and 288.5 eV, which are related to C─ C or C═ C, C─ N or C─ O and C═ N forms of carbon, respectively (Figure d) …”

“…[115] The C 1 s XPS spectrum showed three peaks centred at 284.6, 286.4 and 288.5 eV, which are related to C─ C or C═ C, C─ N or C─ O and C═ N forms of carbon, respectively (Figure 8d). [117][118][119][120] The catalytic activity of 3 was evaluated in the threecomponent coupling reaction of amines, aldehydes and alkynes (A 3 coupling). Initial experiments using 4bromobenzaldehyde, piperidine and phenylacetylene were performed to optimize the reaction conditions.…”

Tungsten Nanoparticles Accelerate Polysulfides Conversion: A Viable Route toward Stable Room‐Temperature Sodium–Sulfur Batteries

“…These peaks originate from the N‐doping in the graphene. [ 14b,16 ] The N 1s spectra exhibit three peaks—the peak with the lowest binding energy is assigned to the W‐N species, [ 17 ] while the other two are associated with the pyrrolic N and pyridinic N, respectively (Figure 1i). [ 18 ] W is coordinated with N, which achieved a cationic coordination environment and showed different oxidation states, the W 4f spectra show two characteristic doublets at 36.665/34.515 eV and 33.665/31.515 eV with a separation of about 2.15 eV, which are associated with the W 2+ and W 5+ oxidation states (Figure 1j).…”