Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

Version 1 : Received: 2 August 2021 / Approved: 3 August 2021 / Online: 3 August 2021 (10:14:39 CEST)

How to cite: Zhou, X.; Cao, Y.; Zhou, X.; Xu, L.; Zhang, D.; Wang, C.; Chu, F.; Qian, T. Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination. Preprints 2021, 2021080069 (doi: 10.20944/preprints202108.0069.v1). Zhou, X.; Cao, Y.; Zhou, X.; Xu, L.; Zhang, D.; Wang, C.; Chu, F.; Qian, T. Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination. Preprints 2021, 2021080069 (doi: 10.20944/preprints202108.0069.v1).

Abstract

Ag+ pollution is great of harm to the human body and the biology. Therefore, it is an urgent need to develop inexpensive and accurate detection methods. Herein, lignin-derived structural memory carbon nanodots (CSM-dots) with outstanding fluorescence property were fabricated via a green method, which reserve functional and structural units of the precursor molecules. The CSM-dots could specifically bind Ag+, accompanied with a remarkable fluorescence quenching response. This “turn-off” fluorescence behavior was used for Ag+ determination in a linear range of 5-290 μM with the detection limit as low as 500 nM. Furthermore, the finding showed that this sensing nano-platform was successfully used for Ag+ determination in real samples and intracellular imaging, showing great potential in biological and environmental monitoring applications.

Keywords

Carbon nanodots; Silver ion; Fluorescent sensor; Structural memory; Intracellular imaging

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