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Ultrasensitive and Recyclable Upconversion‐Fluorescence Fibrous Indicator Paper with Plasmonic Nanostructures for Single Droplet Detection
Author(s) -
Li Xin,
Zhang Jun,
Zhang JunCheng,
Wang XiaoXiong,
Liu JiangJun,
Li Ru,
Yu Miao,
Ramakrishna Seeram,
Long YunZe
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900364
Subject(s) - photon upconversion , materials science , fluorescence , nanotechnology , plasmon , nanorod , rhodamine b , electrospinning , nanostructure , optoelectronics , optics , luminescence , polymer , composite material , photocatalysis , chemistry , biochemistry , physics , catalysis
Conventional indicator paper is disposable after use and requires a large amount of target solution. Herein, recyclable upconversion fluorescence indicator papers consisting of upconversion nanorods and plasmonic nanostructures are fabricated by electrospinning. This recyclable indicator paper exhibits good flexibility and superhydrophobicity with enhanced upconversion fluorescence. Rhodamine B (RhB) is selected as the target solution because it is prohibited as a food additive but often occurs in food, and conventional detection methods usually need a large volume of solution (>1 mL) to refine to higher concentrations because of the low detection sensitivity. Significantly different from the traditional detection system, this upconversion fluorescence fibrous indicator paper can detect RhB as low as 0.01 ppm, which is superior to most reported detection limits for fluorescence sensors. Moreover, this indicator paper can detect a single droplet (≈10 µL) of RhB without needing a large amount of solution. After detection, the target solution is easily removed for excellent recyclability, which is another advantage over the traditional detection system.