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Ag@C@Ag trilaminar core-shell nanospheres were prepared at room temperature, using Ag@C nanospheres as templates, polyvinylpyrrolidone (PVP) as surfactant and mild reducing agent. The synergistic effect among the silver core, carbon shell and silver nanoparticles coated on the surface leads to the good analytical performance of Ag@C@Ag nanospheres in H 2 O 2 detection. The combination...
We present the first observation of optical amplification around ∼1 μm taking place in carbon tetrachloride solution of Nd3+ doped crystal nanoparticle synthesized with solvothermal route. Excited with a fiber‐coupled 808‐nm laser diode, Nd3+:NaYF4 nanoparticle dispersed solution exhibited strong near‐infrared emission by the 4F3/2 – 4I11/2 transition of Nd3+ ions. Optical gain (0.13 dB/cm) around...
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