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Ratiometric Photoluminescence Sensing based on Ti3C2 MXene Quantum Dots for the Intracellular pH Sensor

Abstract

Intracellular pH sensing is of importance and can be used as an indicator for monitoring evolution of various diseases and health of cell. Here, we developed a new class of surface-functionalized MXene quantum dots (QDs), Ti3C2, by the sonication cutting and hydrothermal approach and further explored its intracellular pH sensing. The functionalized Ti3C2 QDs exhibits bright excitation-dependent blue photoluminescence (PL) originating from the size effect and surface defects. Meanwhile, Ti3C2 QDs demonstrate the high PL response induced by its deprotonation of the surface defects. Furthermore, combining the high pH sensitive Ti3C2 QDs with the pH responseless [Ru(dpp)3]Cl2, we developed a ratiometric pH sensor to quantitatively monitor the intracellular pH values. This novel MXene quantum dots can serve as a promising platform for developing practical fluorescent nanosensors.

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Publication details

The article was received on 18 Sep 2017, accepted on 03 Dec 2017 and first published on 04 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR06958H
Citation: Nanoscale, 2017, Accepted Manuscript
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    Ratiometric Photoluminescence Sensing based on Ti3C2 MXene Quantum Dots for the Intracellular pH Sensor

    X. Chen, X. Sun, W. Xu, G. Pan, D. Zhou, J. Zhu, H. Wang, X. Bai, B. Dong and H. Song, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR06958H

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