A high-sensitive ratiometric luminescent thermometer based on dual-emission of carbon dots/Rhodamine B nanocomposite

High-sensitivity and colormetric temperature sensing is realized by nanocomposite with carbon dots and Rhodamine B. [Display omitted] A core-shell nanocomposite based on carbon dots (CD)/Rhodamine B (RhB) is realized by a facile method. The composite particles show spherical shape with narrow size d...

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Bibliographic Details
Published in:Journal of colloid and interface science 2019-09, Vol.552, p.572-582
Main Authors: Zhu, Zhenpeng, Sun, Zishan, Guo, Ziying, Zhang, Xinguo, Wu, Zhan-chao
Format: Article
Language:English
Subjects:
Carbon dots
Luminescence
Nanocomposite
Rhodamine
Thermometer
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Summary:High-sensitivity and colormetric temperature sensing is realized by nanocomposite with carbon dots and Rhodamine B. [Display omitted] A core-shell nanocomposite based on carbon dots (CD)/Rhodamine B (RhB) is realized by a facile method. The composite particles show spherical shape with narrow size distribution, non-agglomeration and smooth surface. The as-obtained nanocomposite shows the characteristic dual-emission of thermal-stable CD blue emission and thermal-sensitive RhB red emission at a single excitation wavelength. The fluorescence intensity ratio (FIR) is found to have a good linear relationship (R2 > 0.993) with temperature, while the corresponding maximum absolute and relative sensitivity is 2.01% K−1 and 1.39% K−1 in range of 283–373 K. The research provides a simple approach to create novel dual-emitting nanocomposites for temperature sensing application in micron-scale and biological field.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.05.088