We report the observation of optically pumped lasing in self-coupled resonators constructed with dye-doped polymer nanowires. Three nanowires with a diameter of 350 nm, 360 nm and 500 nm were fabricated into different self-coupled resonators and single-mode lasing emission was obtained. The self-coupled resonators can be utilized to realize tunable laser systems and enhance the coupling efficiency of emission in ultrasmall resonators.

The electrochemical activity and stability of Li₂MnO₃are affected synchronously by lattice vacancies and local coordination configuration.

The antistatic coatings were prepared by using rare earths modified BaTiO₃ powders as conductive fillers instead of the traditional metal additives. The composition and preparation technology of the antistatic coatings were researched. The effects of thinner, curing agent, dispersant, and conductive fillers on surface resistance and performances of the antistatic coatings were studied. The determined composition of the antistatic coatings was that of epoxy resin 10.00 g with curing agent 13%, BaTiO₃ powders 5%, dispersant 2%, and thinner 4 ml g⁻¹. FTIR and SEM analyses illustrated that the dispersant agent and ultrasonic can make modified BaTiO₃ powders in the coatings to disperse completely. The parameters of antistatic coatings were as following: surface resistance is 1.18 × 10¹⁰ Ω, dry time is 6.0 h, solid content is 94.0%, stiffness is 0.419, viscosity is 255 s, adhesive force is 3, and flexibility is 2. The antistatic coatings were prepared by using rare earths modified BaTiO₃ powders will be prospective candidates for reducing static electricity.

BaTiO₃ powders doped with Ag at different Ag/Ba molar ratios were prepared by sol-gel method. The resistivity reached the lowest point of 5.644 Ω·m when Ag concentration was 0.10 at% and the powders were calcined for two times at 800°C and 500°C. XRD and FTIR investigations showed that no new substance was formed after the doping and calcining process, but the particle size and the strength of Ti-O bond in modified BaTiO₃ crystal cell all changed. The conductivity of Ag-doped BaTiO₃ powders with different Ag concentrations and through different preparing methods was discussed by using defect theory.