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Issue 31, 2019
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An electrostatic self-assembly route to prepare C-dots/gold nanoclusters for dual-emission ratiometric optical thermometry in living cells

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Abstract

It is of great significance to construct fluorescence-based nanothermometers via a convenient method. Herein, based on the opposite surface charges of carbon dots (CDs) and gold nanoclusters (Au NCs), a simple and facile self-assemble strategy was developed to obtain the CD/Au NC fluorescent hybrid nanomaterials via electrostatic interactions. At the excitation of 380 nm, the hybrid nanomaterials displayed a typical dual-emission behavior (455 nm and 600 nm). Because of the different thermal sensitivities of CDs and Au NCs, the dual-emission nanomaterials achieved the colorimetric detection of temperature in the range from 20 °C to 80 °C and showed high reproducibility. Furthermore, by taking advantage of the high stability and biocompatibility, the CD/Au NC fluorescent hybrid nanomaterials were further applied to achieve intracellular temperature detection. We expect that this dual-emission fluorescent nanothermometer will be a promising candidate for intracellular imaging and temperature sensing at the subcellular level.

Graphical abstract: An electrostatic self-assembly route to prepare C-dots/gold nanoclusters for dual-emission ratiometric optical thermometry in living cells

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Supplementary files

Article information


Submitted
27 May 2019
Accepted
08 Jul 2019
First published
26 Jul 2019

Anal. Methods, 2019,11, 3974-3980
Article type
Paper

An electrostatic self-assembly route to prepare C-dots/gold nanoclusters for dual-emission ratiometric optical thermometry in living cells

Y. Jia, X. Zhang, C. Yin, X. Zhang, J. Zhang, X. Wang and J. Xin, Anal. Methods, 2019, 11, 3974
DOI: 10.1039/C9AY01115C

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