Solar energy presents the greatest potential by which to produce heat with reduced carbon emissions for power generation. To increase its harvesting and conversion, it is necessary understand fundamental concepts develop new materials. Although many processes can obtain selective absorbing surfaces (SAS) application in solar exploitation, including electroplating methods, those have not suffici...

— A wide range of CrO,/HF mixtures in diluted form and under laser illumination (A = 6328 A) have been found to be useful for defect revealing in n-type {100} GaAs. After removal of 0.2 0.4 microns from the GaAs surface, striations, dislocations, stacking faults and inclusions are revealed, so these etchants can be used to study defects in GaAs epitaxial layers. The characteristic features of t...

a Departamento de Ciências Exatas, Centro Universitário Franciscano, 97010-032 Santa Maria-RS, Brazil b Departamento de Fı́sica, Universidade Federal do Ceará, Caixa Postal 6030, Campus do Pici, 60455-900 Fortaleza, CE, Brazil c Instituto de Quı́mica, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-900, Brazil d Department of Physics and Department of Physics and Departmen...

In this work, graphite intercalation compounds (GICs) were synthesized using three different oxidizers: (NH4)2S2O8, K2S2O8, and CrO3 with without P2O5 as a water-binding agent. Furthermore, the samples obtained heat-treated at 800 °C. Specimens characterized by optical microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), scanning electr...