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Two-dimensional (2D) CuO nanoplatelets were synthesized in the presence of ionic liquids under the mild hydrothermal conditions at 140°C by self-assembly. The thickness of CuO nanoplatelets was about 35 nm prepared in 1-butyl-3-methylimidazolium chloride. XRD, FESEM, and TEM were used to characterize the structure features of the products. FTIR spectra and TG curves confirmed the adsorption of ionic liquids on the surface of CuO nanoplatelets. In addition, UV-visible absorption spectra were employed to estimate the band gap energies of the CuO nanoplatelets as nanosized semiconductors. It was demonstrated that the ionic liquids could act as a cosolvent, soft template agent and modifiers. [ABSTRACT FROM AUTHOR]

Abstract: Yb3Al5O12 single crystal has been grown by Czochralski (CZ) method. The absorption spectrum was investigated at low temperature and the electronic energy levels for 2F5/2 multiplet of Yb3+ in YbAG was proposed. The up-conversion emission of the crystal under 940nm diode pumping and the X-ray excited luminescence (XEL) features of the crystal were also studied. [Copyright &y& Elsevier]

Abstract: Yb: YAlO3 (YAP) (15at%) and Yb: Y3Al5O12 (YAG)(15at%) have been grown using the Czochralski method. Their absorption and fluorescence spectra were measured at room temperature and important spectroscopic parameters were calculated. Through the comparison of spectroscopic parameters of Yb:YAP and Yb: YAG, all results indicate that 15at% Yb:YAP crystal is a potential candidate used for compact, efficient thin chip lasers when the laser output wavelength is 1012 or 1038nm. [Copyright &y& Elsevier]