Photoluminescence spectroscopy of YVO{sub 4}:Eu{sup 3+} nanoparticles with aromatic linker molecules: A precursor to biomedical functionalization

Photoluminescence spectra of YVO{sub 4}:Eu{sup 3+} nanoparticles are presented, with and without the attachment of organic molecules that are proposed for linking to biomolecules. YVO{sub 4}:Eu{sup 3+} nanoparticles with 5% dopant concentration were synthesized via wet chemical synthesis. X-ray diff...

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Bibliographic Details
Published in:Journal of applied physics 2014-04, Vol.115 (16)
Main Authors: Senty, T. R., Yalamanchi, M., Cushing, S. K., Seehra, M. S., Bristow, A. D., Zhang, Y., Shi, X.
Format: Article
Language:English
Subjects:
BENZOIC ACID
CONCENTRATION RATIO
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
E1-TRANSITIONS
EMISSION SPECTROSCOPY
EUROPIUM IONS
EXCITATION
INFRARED SPECTRA
M1-TRANSITIONS
MOLECULES
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
PARTICLES
PHOTOLUMINESCENCE
TRANSMISSION ELECTRON MICROSCOPY
VANADATES
X-RAY DIFFRACTION
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Summary:Photoluminescence spectra of YVO{sub 4}:Eu{sup 3+} nanoparticles are presented, with and without the attachment of organic molecules that are proposed for linking to biomolecules. YVO{sub 4}:Eu{sup 3+} nanoparticles with 5% dopant concentration were synthesized via wet chemical synthesis. X-ray diffraction and transmission electron microscopy show the expected wakefieldite structure of tetragonal particles with an average size of 17 nm. Fourier-transform infrared spectroscopy determines that metal-carboxylate coordination is successful in replacing native metal-hydroxyl bonds with three organic linkers, namely, benzoic acid, 3-nitro 4-chloro-benzoic acid, and 3,4-dihydroxybenzoic acid, in separate treatments. UV-excitation photoluminescence spectra show that the position and intensity of the dominant {sup 5}D{sub 0} – {sup 7}F{sub 2} electric-dipole transition at 619 nm are unaffected by the benzoic acid and 3-nitro 4-chloro-benzoic acid treatments. Attachment of 3,4-dihydroxybenzoic acid produces an order-of-magnitude quenching in the photoluminescence, due to the presence of high-frequency vibrational modes in the linker. Ratios of the dominant electric- and magnetic-dipole transitions confirm infrared measurements, which indicate that the bulk crystal of the nanoparticle is unchanged by all three treatments.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4874179