论文标题
二氧化硅溶胶 - 凝胶玻璃的结构研究，该玻璃充满了硒化纳米颗粒，具有等离子共振吸收
Structural studies of the silica sol-gel glasses doped with copper selenide nanoparticles with plasmonic resonance absorption
论文作者
论文摘要
背景：半导体掺杂的眼镜在多年中进行了积极治疗，并继续引起人们的极大兴趣，因为各种化学性质的纳米化半导体的挑战性特征。铜硫化剂已发现血浆特性，该特性与针对主要的半导体纳米颗粒特有的量子限制作用一致。目的：这项工作的目的是研究带有铜硒化纳米颗粒的Sol-Gel衍生的二氧化硅玻璃的结构和光学特性，这些颗粒显示了等离子光吸收在接近IR范围内的外观。方法：研究的样品是通过原始的溶胶 - 凝胶技术来制造的，该技术同时合成了硒化铜和中孔二氧化硅的烧结。用X射线衍射（XRD），透射电子显微镜（TEM）和光吸收光谱表征铜硒化玻璃。结果：用XRD和TEM技术建立了大小范围从数十个nm到100-150 nm的纳米晶Cu2-XSE颗粒的形成。主光学性质由可见的和近IR范围中的特征吸收提出。例如，评估2.10-2.36 eV范围内的直接过渡。由于载体浓度升高而导致的纳米颗粒中的等离子共振是由具有可变化学计量学的Cu2-XSE纳米颗粒的内在缺陷。它的能量可以通过合成过程中的Cu/SE比控制。
Background: Semiconductor-doped glasses are treated actively through many years and continue to be of great interest because challenged features of nanosized semiconductors of various chemical nature. Copper chalcogenides have discovered the plasmonic properties in line with quantum confinement effects specific for major of semiconductor nanoparticles. Objective: The aim of this work is to study structural and optical features of the sol-gel derived silica glasses with copper selenide nanoparticles demonstrating appearance of the plasmonic light absorption in the near IR range. Method: The samples under study were fabricated through an original sol-gel technique realizing the simultaneous synthesis of copper selenide and sintering of mesoporous silica. The copper selenide glasses were characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM) and optical absorption spectroscopy. Results: Formation of nanocrystalline Cu2-xSe particles of the size range from tens nm through 100-150 nm is established with XRD and TEM techniques. The principal optical properties are presented by the featured absorption in the visible and near-IR ranges. Eg was evaluated for the direct transitions in the range of 2.10-2.36 eV. The plasmonic resonance in the nanoparticles due to increased carrier concentration originated by intrinsic defectness of Cu2-xSe nanoparticles with variable stoichiometry. Its energy can be controlled by Cu/Se ratio in the synthesis procedure.
