Eu3+doped α-sodium gadolinium fluoride luminomagnetic nanophosphor as a bimodal nanoprobe for high-contrastin vitrobioimaging and external magnetic field tracking applications.
Herein, we introduce a novel strategy for the synthesis of Eu3+doped α-sodium gadolinium fluoride (α-NaGd0.88F4:Eu0.123+) based luminomagnetic nanophosphors using hydrothermal route. The synthesized nanophosphor has exceptional luminescent and paramagnetic properties in a single host lattice, which is highly desirable for biomedical applications. This highly luminescent nanophosphor with an average particle size ∼ 5±3 nm enables high-contrast fluorescent imaging with decreased light scattering.In vitrocellular uptake is shown by fluorescent microscopy that envisages the characteristic hypersensitive red emission of Eu3+doped α-sodium gadolinium fluoride centered at 608 nm (5D0-7F2) upon 465 nm excitation wavelength. No apparent cytotoxicity is observed. Furthermore, time- resolved emission spectroscopy and SQUID magnetic measurements successfully demonstrate a photoluminescence decay time in microseconds and enhanced paramagnetic behavior respectively, which promises the applications of nanophosphors in biomedical studies. Hence, the obtained results strongly suggest that this nanophosphor could be potentially used as a bimodal nanoprobe for high-contrastin vitrobio-imaging of HeLa cells and external magnetic field tracking applications of luminomagnetic nanophosphors using permanent magnet.
Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110012, India; Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
Satbir
S
Singh
Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110012, India; Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
Pawan
P
Kumar
Department of Molecular and Human Genetics & Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA.
Benny Abraham
BA
Kaipparettu
Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
Bipin Kumar
BK
Gupta
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