Abstract
The extinction behavior of various-shaped and core-shell-structured lanthanum hexaboride (LaB6) nanoparticles was theoretically studied based on the discrete dipole approximation method. It was found that different nanoparticle shapes yielded a great influence on extinction efficiency. In comparison to spherical and cubic particles, the near-infrared (NIR) extinction peak of rod-like nanoparticles appeared at a longer wavelength. For core-shell-structured LaB6 particles, all of LaB6@TiO2, LaB6@ZnO, and LaB6@SiO2 exhibited low extinction in the visible region and high extinction in the NIR region, indicating that these three structures are potential transparent heat-shielding materials. Moreover, LaB6@TiO2 manifested better NIR extinction behavior than LaB6@ZnO and LaB6@SiO2; however, its transmittance in the visible region was slightly reduced.
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