Silver nanoparticles (Ag NPs) with a mean size of about 90 nm were synthesized by polyol reduction of silver nitrate with ethylene glycol (EG) in the presence of poly(vinyl pyrrolidone) (PVP). The Ag NPs undergo a spontaneous coalescence in the presence of chloride ions even without a traditional sintering process which occurs at a relatively high temperature. Such behavior can cause a rapid decrease in the resistivity of the patterns fabricated by Ag NPs. Conductive silver lines were successfully fabricated on FR-4 substrate using this method. The resulting conductivity of the silver lines reached about 16% of the bulk silver value, which enables fabrication of conductive patterns on some electronic devices.

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A new fluorescent sensor for selective and sensitive sensing of Cu 2+ and Fe 3+ based on the rational control of multiple mechanisms has been developed. Sensor L, is weak-fluorescent (ϕ=0.029) due to the C=N isomerization and PET process. Upon binding with Cu 2+ , the complex L+Cu 2+ can give a rematkable fluorescence enhancement (ϕ=0.182) with a limit of detection down to 1.3×10 -8 mol/L because of the both inhibition of C=N isomerization and PET process. However, upon binding with Fe 3+ , the original weak fluorescence of L is completely quenched (ϕ=0.002) due to the paramagnetic quenching property. In addition, the lighted complex L+Cu 2+ could be further used as a new platform for ultrasensitive detection of Fe 3+ based on the fluorescence "turn-off" response with a limit of detection down to 2.4×10 -8 mol/L in aqueous solution.

Novel TiO2/V2O5 hybrid films by combining hydrothermal and electrochemical deposition methods were prepared and the hybrid films show the improved electrochemical and electrochromic properties compared with the single V2O5 thin film.