Sensitive detection of NaYF4

Yb/Tm nanoparticles using suspended core microstructured optical fibers

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

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

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.

Original languageEnglish
Title of host publicationColloidal Nanocrystals for Biomedical Applications VIII
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-6
Number of pages6
Volume8595
ISBN (Print)9780819493644
DOIs
Publication statusPublished - 2013
EventColloidal Nanocrystals for Biomedical Applications VIII - San Francisco, CA, United States
Duration: 2 Feb 20134 Feb 2013

Other

OtherColloidal Nanocrystals for Biomedical Applications VIII
CountryUnited States
CitySan Francisco, CA
Period2/02/134/02/13

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