A novel hybrid nanocomposite material consisting of Sn, SnO, and SnO2 (HNCs) was successfully synthesized via a modified hydrothermal technique using urea and SnCl2 salt as precursors. The Sn/SnO/SnO2 ratio...

Fluorescent dye 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS) is used to develop a ratiometric pH indicator based on NaYF4:Yb3+/Tm3+ upconversion nanoparticles (UCNPs). HPTS was functionalized onto the UCNP surfaces via a modified co-condensation silica coating (UCNP@SiO2-HPTS). The as-prepared UCNP@SiO2-HPTS core-shell nanostructure was characterized with transmission electron microscopy, scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy (FT-IR), and photoluminescence spectroscopy. Luminescence resonance energy transfer (LRET) from NaYF4:Yb3+/Tm3+ UCNP to HPTS was found to exhibit pH-sensitivity simultaneously under near-infrared (NIR) irradiation (λ = 980 nm).

A new glycoside, telosmoside A 21 (1) and two known compounds, telosmoside A 6 (2) and telosmoside A 1 (3), were isolated from the roots of Jasminanthes tuyetanhiae. The structure of compound 1 was identified from its spectroscopic data and by comparison with the literature.

In this research, Finite Difference Time Domain (FDTD) is applied using nonuniform grids and second ordered Liao's Absorbing Boundary Condition (ABC) for simulating the electromagnetic shielding effect of Carbon Fiber Reinforced Plastic (CFRP) panels. Besides, these panels are unidirectional laminates with an anisotropic conductivity model. The presence of very small or thin structures is taken into account in this scheme through a simple way. This improves the flexibility of FDTD method. Hence, simulation results are able to give a clear and accurate view of this dynamic phenomenon. Moreover, these achieved results prove that a coated paint on the surface of the CFRP panels can improve the shielding performance effectively.

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