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Role of Rare Earth Oxide Nanoparticles (CeO2 and La2O3) in Suppressing the Photobleaching of Fluorescent Organic Dyes

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Abstract

Aqueous solutions with Rhodamine dye, and fluorescently labeled polymer samples of fibrin and collagen were mixed with aqueous dispersions of cerium oxide, lanthanum oxide, iron (II) oxide nanoparticles, and OxyFluor, a commonly used reagent for suppressing photobleaching. From time dependent studies of the fluorescence from these samples, we observed that the dyes in samples containing rare earth oxide nanoparticles exhibited significantly slower rates of fluorescence decay compared to control samples without additives, or containing OxyFluor or iron oxide nanoparticles. We posit that this may be related to the oxygen free radical scavenging properties of rare earth oxides.

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Acknowledgments

We would like to thank Professor Arjun G. Yodh in the department of Physics and Astronomy, and Director of the Laboratory for Research on the Structure of Matter at the University of Pennsylvania for the opportunity of performing the experiments in his lab, and helpful suggestions. We would also like to thank Mr. Ted van Kessel and Dr. Siyuan Lu (both at IBM T.J. Watson Research Center) for useful discussions and suggestions.

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  1. Anindita Basu

    Present address: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA

Authors and Affiliations

  1. Horace Greeley High School, Chappaqua, NY, 10514, USA

    Anubhav Guha

  2. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, 19104, USA

    Anindita Basu

Authors
  1. Anubhav Guha
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  2. Anindita Basu
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Correspondence to Anindita Basu.

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Guha, A., Basu, A. Role of Rare Earth Oxide Nanoparticles (CeO2 and La2O3) in Suppressing the Photobleaching of Fluorescent Organic Dyes. J Fluoresc 24, 683–687 (2014). https://doi.org/10.1007/s10895-014-1375-2

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  • DOI: https://doi.org/10.1007/s10895-014-1375-2

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