Sm<sup>3+</sup>掺杂SiO<sub>2</sub>纳米棒的制备及发光性能研究

doi:10.3964/j.issn.1000-0593(2025)03-0712-05

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Abstract As a typical nano-insulating material, SiO₂ nanomaterial has quantum size limitations. Combined with the unique photoelectric characteristics of different elements, the effect is widely used in biomedicine and nanodevice-integrated electronics. With the advent of the scientific era, the research results are increasing daily. The research work of rare earth-doped nano-luminescent materials is gradually launched. Its broad application scope includes information display, laser materials, optical fiber communication, and fluorescence detection. Sm³⁺ is an important rare earth oxide ion material. It has potential applications in solar cells, nanoelectronic devices, semiconductor glass, biochemical sensors, and nanomagnets. In this experiment, Sm³⁺ doped SiO₂ nanorods were successfully prepared by thermal evaporation. Characterization tests using scanning electron microscopy, X-ray diffraction, and Raman scattering spectroscopy revealed that Sm³⁺ doped SiO₂ nanorods have a tetragonal crystal structure. With the decrease of deposition temperature, the diameter of the nanorod increases, the deposition density decreases, and the morphology of the sample changes from a nanorod-like structure to a micro-particle gradually; after doping, the diffraction of the SiO₂ lattice shifts to a small angle, the lattice constant increases, and the cell volume increases. The growth process of Sm3+ doped SiO₂ nanorods was not affected by metal catalysts. Under saturated vapor pressure, gaseous SiO₂ will deposit on substrate regions with different temperatures along the direction of carrier gas flow. Regions with higher temperatures tend to deposit and nucleate preferentially. In the low-temperature region, the oxygen diffusion driving force decreases, and the nucleation growth opportunity decreases, inhibiting the growth of one-dimensional nanostructures and making it easier to form nanoparticles. The synthesis of Sm³⁺ doped SiO₂ nanorods follows a gas-solid (VS) growth mechanism. An analysis of the optical performance of Sm³⁺ doped SiO₂ nanorods by UV and PL tests found that the doping affected the light absorption of SiO₂ is blue-shifted, and the corresponding band gap is increased by 0.7～0.8 eV. Different from traditional SiO₂ nano/micron material, Sm³⁺ doped SiO₂ transferred energy to Sm³⁺ after being stimulated by radiation, and the material showed a Sm³⁺ characteristic luminescence performance. This study has important guiding significance for applying SiO₂ materials in optical information.

Key words：SiO₂(silica); Doping; Raman spectra; Absorption spectra; Luminescence properties

Received: 2024-03-22 Accepted: 2024-07-08

ZTFLH:

O734+.3

Corresponding Authors: LÜ Hang E-mail: lvhang@gymail.bhu.edu.cn

Cite this article:

YANG Xi-bao,SONG Yu-hao,Lü Hang, et al. Preparation and Luminescence Properties of Sm³⁺ Doped SiO₂ Nanorods[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(03): 712-716.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2025)03-0712-05 OR https://www.gpxygpfx.com/EN/Y2025/V45/I03/712

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