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Highly photoluminescent ZnSe/Au nanocomposites have been prepared via a simple low-temperature-aqueous synthesis and direct coupling approach. The mechanism of surface plasmons enhanced photoluminescence of ZnSe/Au nanocomposites is investigated. Furthermore, due to high photostability and biocompatibility, the as-prepared ZnSe/Au nanocomposites are demonstrated as excellent probes in cellular imaging. [ABSTRACT FROM AUTHOR]

Abstract: The Ni doped CuAlO2 films were prepared by sol–gel on single crystal quartz substrates. The photoconductivity and transmittivity of as-prepared thin films were demonstrated to be influenced by the different Ni concentration. Experimental results indicate that the film with 3at% Ni concentration has a good transmission of 75% in the visible light range and a preferable photoconductivity 3.1×10−2 Scm−1 in 100mW/cm2 illumination. It can be attributed to the changing of the hole carrier concentration and carrier mobility after Ni doping. The small polaron theory and crystal structure distortion were proposed to explain such results. Calculated by the fitted formula, the response time of rise time and the decay time are 75ms and 50ms respectively, and the photosensitiveness is 215%, which provide the possibility for further application. [Copyright &y& Elsevier]

Carbon nanotube (CNT)-doped liquid crystals (LCs) have attracted intensive research studies as prospective materials in optic display devices, microfluidic sensors, and lubricants due to their unique molecular structures and properties. In this paper, the interaction between the doped CNTs and the hosting 4-cyano-4 $^{\prime }$-pentylbiphenyl (5CB) molecules (in both nematic and isotropic phases) was investigated and we focused on the boundary layer rheological properties of the CNT-doped 5CB under external electric field. The experiments were performed by using a quartz crystal microbalance (for boundary layer viscosity investigation) and a rheometer (for bulk viscosity measurement). The results indicate that the bulk viscosity of the CNT-doped 5CB presents an obvious electroviscous effect in its nematic phase while no electroviscous effect in its isotropic phase. Additionally, we found that the boundary layer viscosity of the CNT-doped 5CB demonstrated significant electroviscous effects both in its nematic phase and isotropic phase. The enhanced electroviscous effects on the boundary layer viscosity of CNT-doped 5CB can be attributed to the highly ordered structures of LC molecules and CNTs on the substrate under external electric field. The unique properties of the boundary layer rheology of CNT-doped 5CB LC were further discussed in view of the ordering of LC molecules induced by the electric field, the polarity of CNTs, and the aligning interaction between CNTs and LC molecules. [ABSTRACT FROM AUTHOR]