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Proceedings Paper

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

Rare-earth doped upconversion nanocrystals are emerging as the next-generation luminescent biomaterials. Here we load NaYF4: Yb/Er and NaYF4: 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.

Paper Details

Date Published: 22 February 2013
PDF: 6 pages
Proc. SPIE 8595, Colloidal Nanocrystals for Biomedical Applications VIII, 85950X (22 February 2013); doi: 10.1117/12.2004236
Show Author Affiliations
Erik P. Schartner, Univ. of Adelaide (Australia)
Dayong Jin, Macquarie Univ. (Australia)
Jiangbo Zhao, Macquarie Univ. (Australia)
Tanya M. Monro, Univ. of Adelaide (Australia)

Published in SPIE Proceedings Vol. 8595:
Colloidal Nanocrystals for Biomedical Applications VIII
Wolfgang J. Parak; Marek Osinski; Kenji Yamamoto, Editor(s)

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