Muonium centres in Cu2O, Ag2O and CdO show hyperfine parameters spanning four orders of magnitude. They exemplify the three different categories of hydrogen defect centre in semiconducting and dielectric solids, with very different electronic structure and electrical activity, namely quasi-atomic (possibly deep acceptor), deep donor and shallow donor.

The exchange interaction for the yellow 1S orthoexciton in Cu2O is derived up to the order K2. The resulting exchange splittings are verified experimentally using high resolution spectroscopy. In agreement with theory the fine structure shows a characteristic dependence on the direction of the wave vector.

The phonon dispersion curves of Cu 0 have been calculated using 2 a shell model which takes into account nearest neighbour 0-Cu, Cu-Cu and 0-0 interactions, long range Coulomb interactions and the electronic polarizability of both the oxygen and the copper ions. The results are compared with the data obtained from ultrasound, infrared, Raman and inelastic neutron scattering measurements. The in...

This study synthesized nanocomposite photocatalyst materials from a mixture of Cu2O nanoparticles, ZnO and graphene oxide (GO) through coprecipitation hydrothermal methods. aims to determine the optimum composition Cu2O/ZnO/GO nanocomposites in degrading methylene blue. The was two steps: 1 synthesis nanoparticles method preparation GO modified Hummer method. 2 mixtures with form nanocomposites...

We report theoretical and experimental study on Auger decay of excitons in Cu2O in a wide range of temperatures, from 2 Kelvin to 325 Kelvin, in single-photon surface excitation. We find that the Auger constant linearly increases with temperature above 100 Kelvin. This constant is important for experiments on Bose condensation of excitons.

This supplementary information contains the detailed information on “Solid phase extraction.”, “photoelectrochemical measurements”, “ESR measurements”, “Mechanism of Cu2O rod formation”, “Photoabsorptivity”, “TOC difference under visible light and UV light.”, “Kinetics”, “Quantum yield of degradation”, “Optimum amount of Au”, “Catalytic role of gold”, “ESR analysis”, “Frontier Molecular Orbit”,...

2014 The analysis of creep transitories after a change in oxygen partial pressure, allowed us to determine chemical diffusion coefficients for CoO and Cu2O, singleand polycrystals. The rate of equilibration of point defect concentrations is similar for all defects. Grain boundaries do not seem to accelerate the process. Tome 21 ? 6 JUIN 1986 Revue Phys. Appl. 21 (1986) 343-348 JUIN 1986,

In this paper, electrodeposition and visible light photocurrent responses of Zn-doped Cu2O were reported. The process was conducted with different deposition time to study the growth deposit. structural investigation elemental analysis performed on an energy dispersive X-ray spectrometer diffractometer, respectively. crystal studied from micrograph obtained using a field emission scanning elect...