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Dispersing upconversion nanocrystals in a single silicon microtube.

ABSTRACT: Nanocrystals of Ln³⁺ (Ln?=?Yb, Tm and Ho) doped ?-NaLuF₄ with average diameter about 200?nm are dispersed in silica-based microtube (MT) by a simple flame heating method. The fabricated microtube has a diameter range from 2??m to 30??m and lengths up to hundreds microns. The fluorescence of upconversion nanocrystals (UCNCs) can propagate along a single MT and couple into another MT through evanescent field. The guiding performance of the single UCNCs doped MT is measured to prove that it can be used as an active waveguide. Moreover, optical temperature sensing based on the single UCNCs-MT is also demonstrated, and the sensitivity of UCNCs-MT is significantly enough for thermometry applications in the range of 298-383?K.

SUBMITTER: Li H

PROVIDER: S-EPMC5078789 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Dispersing upconversion nanocrystals in a single silicon microtube.

Li Hanyang H Wang Yan Y Li Hui H Zhang Yundong Y Yang Jun J

Scientific reports 20161025

Nanocrystals of Ln<sup>3+</sup> (Ln = Yb, Tm and Ho) doped β-NaLuF<sub>4</sub> with average diameter about 200 nm are dispersed in silica-based microtube (MT) by a simple flame heating method. The fabricated microtube has a diameter range from 2 μm to 30 μm and lengths up to hundreds microns. The fluorescence of upconversion nanocrystals (UCNCs) can propagate along a single MT and couple into another MT through evanescent field. The guiding performance of the single UCNCs doped MT is measured to ...[more]

PMID: 27779210

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