XRD peak profile study revealed that the average crystalline size and lattice parameters were increased by Y/Ho dual doping than pure NiO. FTIR results showed metal-oxygen vibrations. Raman peaks exhibited optical phonon modes shifting by dual doping. FESEM images showed nearly spherical nanoparticles...
The Raman peak at 1637 cm−1 corresponds to an OH bending mode of H2O [42]. The Raman band at 446 cm−1 is related to metal-oxygen vibrations (ν Ni−O) A1g in β-Ni(OH) 2. The Raman peak at 519 cm−1 is best assigned to a second-order acoustic mode of β-Ni(OH)...
To determine the possible phase and composition changes during the activation process, we performed X-ray diffraction, Raman and XPS analyses on the NF and ANF. The X-ray diffractometry studies suggest that the main composition of NF and ANF is nickel, as no other peaks were detected for ...
Raman spectra measured Figure9illustrates the Raman spectra with the wave numbers ranging from 200 to 1000. The peaks for pure LiNbO3were observed at 258, 410, 510, 745 and 830 cm−1and were attributed to the LN phonon mode E transverse optical (TO). After being decorated with AgNPs, i...
Fig. 4. Raman spectra of GO and RGO. and the NO2 /N2 gas mixture, respectively. The resistance of sen-sors decreased when exposed to NO2 and nearly returned to its initial value after NO2 was eliminated, which indicates a reversible bonding between the NO2 molecule and NiO surface. ...
According to the XRD, Raman and FTIR patterns, it revealed that face-centered cubic nickel oxide was prepared on the rGO. The weight ratio of NiO in the rGO@NiO composite was about 50.2% by TG-DSC analysis. The surface of rGO@NiO composite seemed flat relatively with less pleats, ...
corresponding Raman spectrum (see Supporting Information, Figure S1) reveals fi ve broad peaks centered at 402, 520, 695, 879, and 1069 cm −1 , which are of vibrational origin and cor- respond to the one-phonon fi rst-order transverse optical mode ...
importantly, XPS quantification data and Raman spectra confirm the presence of bothNi2+andNi3+states in the NiO films. The electrical properties carried at room temperature revealed that the resistivity of the film significantly increased and a mobility of ~ 84cm2V−1s−1was obtained....
Raman spectroscopy (Renishaw DXR) utilizing 532 nm laser with 8 mW excitation power and 100x objective lens was used to characterize NiO NWF electrode. Chemical states of NiO were examined by X-ray photoelec- tron spectroscopy (XPS, Kratos AXIS ULTRA DLD XPS system) with Al Kα...
Indirect experimental methods can help to test the loss of space inversion symmetry; for example, a recent Raman study9 observed additional phonon modes below the magnetic phase transition temperature, supporting a loss of inversion symmetry, but not all magnetic non-centrosymmetric materials are ...