We introduce the electrospinning method into fabricating oxygen-sensitive submicrometer scale optical fiber. Uniform tris (4,7-diphenyl-1,10-phenathroline) ruthenium(II) dichloride ()-doped fibers with a diameter of are obtained by electrospinning the organic silicon sol solution derived from tetraethyl orthosilicate and n-Octyltriethoxysilane (). The experimental results show that the single gel fiber exhibits excellent optical and sensing properties. A laser with a wavelength of can be efficiently launched into the fiber and guide along the fiber to excite the fluorescence. Then, we find that –gel fiber has favorable optical and sensing characteristics, and the Stern–Volmer plots are linear in the full concentration range of (). The ratio of , where and respectively represent the fluorescence intensities of the fiber exposed to 100% and 100% , as the sensitivity of the fiber is 3.5. Simultaneously, the fiber can make a quick response within . This method provides an effective and convenient way to fabricate highly uniform nanoscale or microscale optical waveguides for photonic devices.
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