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• W3149183934 endingPage "112095" @default.
• W3149183934 startingPage "112095" @default.
• W3149183934 abstract "The intentional design of rare earth doped luminescent architecture exhibits unique optical properties and it can be considered as a promising and potential probe for optical imaging applications. Calcium fluoride (CaF 2 ) nanoparticles doped with optimum concentration of Nd 3+ and Yb 3+ as sensitizer and activator, respectively, were synthesized by wet precipitation method and characterized by x-ray diffraction (XRD) and photoluminescence. In spite of the fact that the energy transfer takes place from Nd 3+ to Yb 3+ , the luminescence intensity was found to be weak due to the lattice defects generated from the doping of trivalent cations (Nd 3+ and Yb 3+ ) for divalent host cations (Ca 2+ ). These defect centres were tailored via charge compensation approach by co-doping Na + ion and by optimizing its concentration and heat treatment duration. CaF 2 doped with 5 mol% Nd 3+ , 3 mol% Yb 3+ and 4 mol% Na + after heat treatment for 2 h exhibited significantly enhanced emission intensity and life time. The ex vivo fluorescence imaging experiment was done at various thickness of chicken breast tissue. The maximum theoretical depth penetration of the NIR light was calculated and the value is 14 mm. The fabricated phosphor can serve as contrast agent for deep tissue near infrared (NIR) light imaging. • We have successfully prepared the Nd 3+ → Yb 3+ energy transfer system. • Defects in CaF 2 :Nd 3+ /Yb 3+ lattice are repaired with Na + ion co-doping. • The optical property of luminescent particles have been tuned via co-doping of Na + and heat treatment process. • Ex vivo optical imaging experiment confirms the feasibility of deep tissue imaging." @default.
• W3149183934 created "2021-04-13" @default.
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• W3149183934 date "2021-06-01" @default.
• W3149183934 modified "2023-10-14" @default.
• W3149183934 title "Fabrication of Nd3+ and Yb3+ doped NIR emitting nano fluorescent probe: A candidate for bioimaging applications" @default.
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• W3149183934 doi "https://doi.org/10.1016/j.msec.2021.112095" @default.
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