Mode-selective phonon excitation by a mid-infrared laser (MIR-FEL) is demonstrated via anti-Stokes Raman scattering measurements of 6H-silicon carbide (SiC). Irradiation of SiC with MIR-FEL and a Nd-YAG laser at 14 K produced a peak where the Raman shift corresponds to a photon energy of 119 meV (10.4 lm). This phenomenon is induced by mode-selective phonon excitation through the irradiation of MIR-FEL, whose photon energy corresponds to the photon-absorption of a particular phonon mode. V C 2013 AIP Publishing LLC. [http://dx.
This work highlights testing the polymer nanocomposite for hydrogen gas production from wastewater (sewage water). The in-situ polymerization technique is used to prepare polypyrrole (PPy) and PPy/NiO x nanocomposite films on a glass substrate. The film's ability to generate hydrogen from sewage water is then evaluated. The XRD and XPS confirmed the formation of two types of NiO X : NiO and Ni 2 O 3 . The optical property of the composite is greater than the polymer under the insertion of NiO x as a core for the polymer coating shell, in which the band gap values are 2.25 and 1.81 eV, respectively. The TEM confirmed the PPy/NiO x core-shell formation, in which the polymer shell (20 nm) coated the NiO X core (170 nm). The electrochemical testing for H 2 gas production is carried out through a three-electrode cell. The effect of light on/off, wavelengths, and temperature on the H 2 production is applied. Under
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