Abstract
Fluorescent nanostructures were prepared by functionalization of gold nanoparticles with riboflavin molecules and used as probes for synchrotron radiation deep ultraviolet (SR-DUV) fluorescence imaging of gluteraldehyde-fixed Candida albicans cells. The nanoparticles were characterized by transmission electron microscopy (TEM) and optical spectroscopy techniques. The TEM analysis showed that the nanostructures were 6 nm in diameter, while the results of the fluorescence spectroscopies confirmed the photoluminescence of the nanoparticles. The SR-DUV imaging showed that it was possible to distinguish the fluorescence of the nanoparticles from the autofluorescence of the cells, as well as that the local maxima of the signal pertaining to the fluorescence of gold-riboflavin nanostructures were mostly positioned on the surfaces of the C. albicans cells of spherical morphology.
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Acknowledgments
Deep UV imaging of C. albicans cells was performed at the DISCO beamline of Synchrotron SOLEIL (France) as a part of the research projects No. 20120810 and 20131218. We acknowledge with gratitude the TNA support of the Synchrotron SOLEIL. The authors kindly acknowledge the help of Dr. Valerie Rouam (SOLEIL) for the help in the preparation of the samples for the fluorescence imaging. This study was financially supported by Ministry of Education, Science and Technological Development, Republic of Serbia (Projects No. 172056, 45020, and 171029).
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This article is part of the Topical Collection on Advances in the Science of Light.
Guest Edited by Jelena Radovanovic, Milutin Stepic, Mikhail Sumetsky, Mauro Pereira and Dragan Indjin.
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Pajović, J.D., Dojčilović, R., Božanić, D.K. et al. Deep UV fluorescence imaging study of Candida albicans cells treated with gold-riboflavin hydrocolloids. Opt Quant Electron 48, 311 (2016). https://doi.org/10.1007/s11082-016-0578-y
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DOI: https://doi.org/10.1007/s11082-016-0578-y