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Photoluminescence spectroscopy of YVO$_{4}$:Eu$^{3+}$ nanoparticles with aromatic linker molecules: a precursor to biomedical functionalization
- Source :
- J. Appl. Phys. 115, 163107 (2014)
- Publication Year :
- 2014
-
Abstract
- Photoluminescence spectra of YVO$_{4}$:Eu$^{3+}$ nanoparticles are presented,with and without the attachment of of organic linker molecules that are proposed for linking to biomolecules. YVO$_{4}$:Eu$^{3+}$ nanoparticles with 5% dopant concentration were synthesized by 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 the 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 dominant $^{5}D_{0}-^{7}F_{2}$ electric-dipole transition at 619 nm is unaffected by the benzoic acid and 3-nitro 4-chloro-benzoic acid treatments. Attachment of the 3,4-dihydroxybenzoic acid produces an order-of-magnitude quenching of the photoluminescence, due to the presence of high-frequency 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.<br />Comment: 9 pages, 5 figures, journal article
Details
- Database :
- arXiv
- Journal :
- J. Appl. Phys. 115, 163107 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1402.4496
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.4874179