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Temperature dependence of (a) the peak intensity of Zn (101) diffraction from Zn NPs embedded in detected by SR-GIXRD, and of (b) the optical transmittance T detected at a fixed photon energy of 3.1 eV. The upward and downward triangles show data points taken in the rising- and falling-temperature sequences, respectively. The closed and open upward triangles show data taken in the first and second runs, respectively. The solid lines are guides for the eye. The dashed line indicates the melting point of bulk Zn.
Temperature dependence of the optical density spectra, i.e., , in the near-infrared (NIR), visible, and ultraviolet (UV) regions, where denotes the optical transmittance. The spectra in the NIR region were magnified 30 times and the backgrounds were subtracted.
Theoretical optical extinction spectra of Zn NPs in derived by the first principle band calculation code WIEN2K. In (a) and (b), the depolarization effects, i.e., the field enhancement effects due to SPR, of metal NPs are included using the 1st order Mie formula. In (b), the Drude term is artificially excluded. In (c), the SPR effects are excluded, i.e., the extinction α is derived from , instead of the Mie formula, where denotes the imaginary part of the complex refractive index.
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