In this paper two methods of preparation of yttrium orthovanadate nanopowders were presented: Solid State Reaction (top – down approach) and Solution Combustion Synthesis (bottom – up approach). For starting structural characterization, X – Ray Powder Diffraction (XPRD) and Field Emission Scanning Electron Microscopy (FESEM) were used. We report the change in reflection spectra in europium doped YVO₄ nanopowders with comparison to its bulk analog. In UV–Vis reflection spectra we consider the change in values of band gap in these structures, after resizing it from bulk to nanomaterial. In Far – Infrared (FIR) reflection spectra, we registered the existence of Surface Optical Phonon (SOP) and different multi – phonon processes which alter the reflection spectra of bulk YVO₄. The influence of Eu ions is reflected through multi – phonon processes that occur and are connected with energy transfer from YVO₄ lattice to Eu ions. All IR spectra were modeled using classical oscillator model with Drude part added which takes into account the free carrier contribution. Since our samples are distinctively inhomogeneous materials, we use Effective Medium theory in Maxwell Garnett approximation to model its effective dieletric function.

在本文中，提出了两种制备原钒酸钇纳米粉体的方法：固态反应（自顶向下法）和溶液燃烧合成（自底向上法）。为了开始结构表征，使用了 X 射线粉末衍射 (XPRD) 和场发射扫描电子显微镜 (FESEM)。我们报告了掺铕 YVO ₄纳米粉末与其体模拟物相比反射光谱的变化。在 UV-Vis 反射光谱中，我们考虑了这些结构中带隙值的变化，在将其从块状材料调整为纳米材料后。在远红外 (FIR) 反射光谱中，我们记录了表面光声子 (SOP) 的存在和不同的多声子过程，它们改变了体 YVO ₄的反射光谱. Eu 离子的影响通过发生的多声子过程反映出来，并且与从 YVO ₄晶格到 Eu 离子的能量转移有关。所有 IR 光谱均使用经典振荡器模型建模，并添加了 Drude 部分，其中考虑了自由载流子的贡献。由于我们的样品是明显不均匀的材料，我们使用 Maxwell Garnett 近似中的有效介质理论来模拟其有效介电函数。