MnNCS-4‐800的 (D) 球差校正HAADF-STEM图和 (E) 对应的EELS点扫描谱图。(F) MnNCS的N2吸脱附曲线 (插图为对应的孔径分布图)。 图3. MnNCS的 (A) 高分辨N 1s XPS谱图, 和 (B) C K-edge和 (C) N K-edge XANES...
EELSTEMChemical analysisCarbon contamination in Cu-1234 superconductors was studied using an electron-energy-loss spectroscope which was attached to a field emission electron microscope. The carbon K-edge was detected only when an electron beam of a diameter as small as 1 nm successfully incidented ...
EELS were collected in the TEM model from a randomly selected ∼200 nm region. The sp3 ratio in the carbon samples was estimated from the carbon K-edge EELS method,16 and glassy carbon was used as the reference. Mechanical performance measurements The hardness of the samples was investigated...
condensed aromatic sheets. Nearly all featured vibrations disappeared above a temperature of 700 °C indicating attenuated functionalities. Further carbon k-edge EELS examination of the pyrogenic carbons at fine spatial scale revealed similar trends in which diminished surface functionality occurred with i...
An analysis of the fraction of sp2-hybridized carbon allows further conclusions about the shear-induced phase transition in the graphite layer. Spatially resolved electron energy loss spectra (EELS) of the carbon-K-edge are measured in different region of interest (ROI) (see BF-TEM images in th...
The use of previously proposed computational methods on the near‐K‐edge EELS data indicates that over 80% of the carbon atoms aresp3bonded. The size of the π* feature is larger for smaller plasmon energies, as expected. The present data are in accord with other analyses of similar films...
Electron energy loss spectroscopy (EELS) provides information on density and chemical bonding of the car- bon atoms29 and was performed on the precursor glassy carbon, the central, and the annular regions of the recov- ered sample (see Supplementary Figure S4). The bulk plasmon peak ...
a EELS measurements of the fraction of sp2 bonded carbon atoms in nanopillar (left graph) and in base (right graph); b Raman spectroscopy data before and after compression; c Schematic diagram of energy barriers for elastic loading and unloading; d Engineering stress-strain curve of cyclic compr...
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Figure 2ddisplays the electron energy loss spectroscopy (EELS) of theh-BCN samples, showing the K-edges of B, C and N. The B- and N-signal of BCN coincide with those ofh-BN, reflecting a similar incorporation in layeredsp2domains18,23. The sharp doublet C–K (π*) and C–K (θ...