期刊
HELIYON
卷 8, 期 6, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2022.e09554
关键词
Zinc oxide nanoparticles; Doped nanocrystals; Laser ablation in liquids; NIR-II photoluminescence
资金
- National Academy of Sciences of Belarus
- Belarusian Republican Foun [F 20KITG-008, F 21KOR-006]
This work reports on the preparation of Nd3+ doped ZnO nanoparticles using laser ablation and post-ablation irradiation techniques. The photoluminescence properties of the synthesized nanoparticles in the second near infrared spectral window were studied. It was found that the Nd-doped ZnO nanoparticles exhibited near-infrared luminescence, and the luminescence properties could be controlled by variations in solvent composition and additional laser irradiation.
The work reports on the use of laser ablation and post-ablation irradiation techniques for the preparation Nd3+ doped ZnO nanoparticles (NPs). The focus has been made on photoluminescence of Nd-doped ZnO NPs in the second near infrared (NIR-II) spectral window (1000-1700 nm) of the biological transparency. Morphology, phase composition and optical properties of the synthesized NPs were studied by absorption and photoluminescence spectroscopy, X-Ray diffraction (XRD) and transmission (TEM) electron microscopy. Near-infrared luminescence of Nd3+ doped ZnO nanocrystals in the region of 1000-1400 nm was detected both upon excitation from the ground state (800 nm) and upon UV excitation. The latter proves the incorporation of the Nd3+ into ZnO lattice as photoluminescence occurs through the transfer of excitation energy from the ZnO matrix to the Nd3+ ion. The possibility of control over the luminescence properties by a variation of solvent composition and by additional laser irradiation was demonstrated.
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