Magneto-optical properties of Mn2+doped TiO2 nanocrystals

被引：0
作者：
Barbosa, Amanda I. dos S. [1 ]
Guimaraes, Eder, V [2 ,5 ]
Rezende, Thais K. de L. [3 ]
Baffa, Oswaldo [4 ]
Dantas, Noelio O. [2 ]
da Silva, Ricardo S. [5 ]
Silva, Anielle Christine A. [1 ]
机构：
[1] Univ Fed Alagoas, Phys Inst, Lab Strateg Mat, Maceio, AL, Brazil
[2] Univ Fed Alagoas, Phys Inst, Lab New Nanostruct & Funct Mat, Maceio, AL, Brazil
[3] Univ Fed Uberlandia, Inst Chem, Uberlandia, MG, Brazil
[4] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Phys, Ribeirao Preto, SP, Brazil
[5] Univ Fed Triangulo Mineiro, Inst Exact & Nat Sci & Educ, Dept Phys, Uberaba, MG, Brazil
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2025年 / 333卷
基金：
巴西圣保罗研究基金会;
关键词：
Mn-doped TiO 2; Nanocrystals; Anatase phase; Structural properties; Magnetic properties; Morphological properties; Crystal field theory; LUMINESCENCE; RAMAN;
D O I：
10.1016/j.matchemphys.2024.130205
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigates the influence of manganese (Mn) ions concentration on titanium dioxide nanocrystals (TiO2 NCs) by comprehensive analysis of X-ray Diffraction (XRD), Raman Spectroscopy, Transmission Electron Microscopy (TEM), Optical Absorption (OA), and Electronic Paramagnetic Resonance (EPR) results. The results establish the successful integration of Mn2+ ions into tetrahedral and octahedral sites within TiO2 NCs, dependent on the doping concentration, confirmed using Crystal Field Theory (CFT) and optical results. The Mn concentration did not alter the anatase crystalline phase of TiO2 , it only caused distortions in the lattice and decrease in size. In the optical and magnetic properties, it was observed that the incorporation of Mn generated an increase in the detection range (UV-VIS) and the presence of the six resonance lines characteristic of Mn2+, being tunable with the concentration. The study confirms the successful synthesis of Mn-doped TiO2 NCs, demonstrating precise tunability of magnetroperties in function of Mn concentration. Thus, can be highlight the considerable potential for precise modulation of nanomaterial properties in advanced optoelectronic and spintronic applications.
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页数：7
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