Probing highly luminescent europium-doped lanthanum orthophosphate nanorods for strategic applications.
Herein we have established a strategy for the synthesis of highly luminescent and biocompatible europium-doped lanthanum orthophosphate (La0.85PO4Eu0.15(3+)) nanorods. The structure and morphogenesis of these nanorods have been probed by XRD, SEM, and TEM/HRTEM techniques. The XRD result confirms that the as-synthesized nanorods form in a monazite phase with a monoclinic crystal structure. Furthermore, the surface morphology shows that the synthesized nanorods have an average diameter of ∼90 nm and length of ∼2 μm. The HRTEM images show clear lattice fringes that support the presence of better crystal quality and enhanced photoluminescence hypersensitive red emission at 610 nm ((5)D0-(7)F2) upon 394 nm wavelength excitation. Furthermore, time-resolved spectroscopy and an MTT assay of these luminescent nanorods demonstrate a photoluminescent decay time of milliseconds with nontoxic behavior. Hence, these obtained results suggest that the as-synthesized luminescent nanorods could be potentially used in invisible security ink and high-contrast bioimaging applications.
CSIR-National Physical Laboratory , Dr K S Krishnan Road, New Delhi 110012, India.
Mohit
M
Saraf
Pawan
P
Kumar
Garima
G
Kedawat
Jaya
J
Dwivedi
Sajna Antony
SA
Vithayathil
Nagendra
N
Jaiswal
Benny Abraham
BA
Kaipparettu
Bipin Kumar
BK
Gupta
D001672:Biocompatible Materials / Q000737:chemistry*; D045744:Cell Line, Tumor; D015195:Drug Design; D005063:Europium / Q000737:chemistry*; D006801:Humans; D049408:Luminescent Agents / Q000737:chemistry*; D057054:Molecular Imaging; D043942:Nanotubes / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*
D001672:Biocompatible Materials; D049408:Luminescent Agents; D010710:Phosphates; D005063:Europium