Sensitive detection of NaYF4: Yb/Tm nanoparticles using suspended core microstructured optical fibers

Erik P. Schartner; Dayong Jin; Jiangbo Zhao; Tanya M. Monro

doi:10.1117/12.2004236

22 February 2013 Sensitive detection of NaYF₄: Yb/Tm nanoparticles using suspended core microstructured optical fibers

Erik P. Schartner; Dayong Jin; Jiangbo Zhao; Tanya M. Monro

Author Affiliations +

Proceedings Volume 8595, Colloidal Nanocrystals for Biomedical Applications VIII; 85950X (2013) https://doi.org/10.1117/12.2004236
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Rare-earth doped upconversion nanocrystals are emerging as the next-generation luminescent biomaterials. Here we load NaYF₄: Yb/Er and N_aYF₄: Yb/Tm upconversion nanocrystals into a soft-glass suspended-core optical fiber dip sensor, allowing sensitive measurements and power-dependent characterizations to be performed. This, in combination with negligible background autofluorescence from the glass fiber when using infrared excitation has provided a significant improvement in terms of sensitivity over what has previously been demonstrated using an optical fiber dip sensor. For detection we employ suspended-core optical fibers, which have found extensive use in sensing applications. These combine the high evanescent overlap comparable to that of a nanowire, with the robust handling characteristics and long interaction length of a conventional fiber. The fiber sensor platform allows measurements to be performed using minimal sample volumes (<20 nL) while still maintaining the sensitivity of the platform.

Citation Download Citation

Erik P. Schartner, Erik P. Schartner, Dayong Jin, Dayong Jin, Jiangbo Zhao, Jiangbo Zhao, Tanya M. Monro, Tanya M. Monro, } "Sensitive detection of NaYF₄: Yb/Tm nanoparticles using suspended core microstructured optical fibers", Proc. SPIE 8595, Colloidal Nanocrystals for Biomedical Applications VIII, 85950X (22 February 2013); doi: 10.1117/12.2004236; https://doi.org/10.1117/12.2004236

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