Fabrication of SiO2@upconversion nanoparticles composites with tunable magneto-fluorescent properties for bimodal imaging

[Display omitted] •Novel Fe and Mn Co-doped upconversion nanoparticles were successfully synthesized.•Fe and Mn doping offers control on photoluminescence and magnetic characteristics.•Fe-Mn doped upconversion nanoparticles immobilized on SiO2 results in nanocomposite.•Nanocomposites offer multimoda...

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Bibliographic Details
Published in:Materials letters 2021-06, Vol.293, p.129669, Article 129669
Main Authors: Hassan, Syed Mujtaba ul, Anis, Tanzeela, Shahzad, Faisal, Iqbal, Zafar, Ahmad, Jamil
Format: Article
Language:English
Subjects:
Biomedical materials
Co-doping
Contrast agents
Doping
Erbium
Fluorescence
Fluorides
Hydrophilicity
Iron
Magnetic properties
Manganese
Materials science
Medical imaging
Nanocomposites
Nanoparticles
Optical properties
Photoluminescence
Silicon dioxide
Sodium compounds
Surface treatment
Upconversion
Upconversion nanoparticles
Ytterbium
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Summary:[Display omitted] •Novel Fe and Mn Co-doped upconversion nanoparticles were successfully synthesized.•Fe and Mn doping offers control on photoluminescence and magnetic characteristics.•Fe-Mn doped upconversion nanoparticles immobilized on SiO2 results in nanocomposite.•Nanocomposites offer multimodal imaging and drug delivery potential. This study presents Mn and Fe co-doped NaYF4:Yb/Er upconversion nanoparticles for potential biomedical applications. Solvothermally prepared nanoparticles were rendered hydrophilic through acidic surface treatment. Hydrophilic nanoparticles were immobilized on SiO2 particles. Effect of co-doping on optical and magnetic properties was studied through photoluminescence spectra and magnetic characterization. Higher Mn/Fe mole ratio improved red emission intensity in NaYF4:Yb/Er upconversion nanoparticles whereas lower Mn/Fe mole ratio improved paramagnetic properties. Co-doping with Mn and Fe is a useful way to tune properties of NaYF4:Yb/Er upconversion nanoparticles as bioimaging and T1 MRI contrast agents.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.129669