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Water-soluble, fluorescent carbon dots (CDs) have been successfully synthesized from waste paper. The as-prepared CDs, with an amorphous structure and small particle size, exhibit good photostability, high photoluminescence quantum yields (PLQYs) and fairly low toxicity, which indicate potential applications in the field of biolabelling. [ABSTRACT FROM AUTHOR]

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]

Water-soluble carbon dots (CDs) have been successfully synthesized by green-one-pot hydrothermal method. The CDs with small particle size exhibit fairly good water solubility, tunable photoluminescence, up-converted photoluminescence, and low toxicity. What is more, the as-prepared CDs were successfully applied in the field of cell image. [ABSTRACT FROM AUTHOR]

Abstract: Highly Photoluminescent (PL) carbon dots (CDs) with a PL quantum yield (PLQY) of 7.7% have been prepared from cornflour by a simple hydrothermal method. The as-prepared carbon dots have good water solubility, well distributed particle size, amorphous structure and acceptable fluorescence lifetime. Besides, due to the fairly good biocompatibility and outstanding fluorescent properties, the CDs were successfully applied to cell imaging and Cu2+ detecting. [Copyright &y& Elsevier]