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One-step synthesis of nitrogen-doped carbon nanodots for ratiometric pH sensing by femtosecond laser ablation method

Xu, H. and Yan, L. and Nguyen, V. and Yu, Y. and Xu, Y. (2017) One-step synthesis of nitrogen-doped carbon nanodots for ratiometric pH sensing by femtosecond laser ablation method. Applied Surface Science, 414. pp. 238-243. ISSN 1694332

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One-step synthesis of nitrogen-doped carbon nanodots for ratiometric pH sensing by femtosecond laser ablation method..pdf

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Abstract

Nitrogen-doped carbon nanodots (CDs) are synthesized by one-step femtosecond laser ablation of graphite powder in aminotoluene at room temperature. The as-prepared CDs have the average diameter of 2.87 nm and possess an excitation-independent emission covering nearly the whole visible light region at a single excitation wavelength. The X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analysis indicate that there are a huge number of multiple oxygen groups and amine groups on the surface of the CDs. As their different fluorescence peaks originated from different emission surface groups on the nanodots show different pH dependence, these CDs can be used for ratiometric pH sensing. © 2017 Elsevier B.V.

Item Type: Article
Divisions: Offices > Office of International Cooperation
Identification Number: 10.1016/j.apsusc.2017.04.092
Uncontrolled Keywords: Ablation; Carbon; Doping (additives); Femtosecond lasers; Fourier transform infrared spectroscopy; Laser ablation; Nanodots; Nitrogen; pH sensors; Surface states; Biosensing; Carbon nanodots; Fluorescence peak; Nitrogen-doped carbons; One step synthesis; Ratiometric pH sensing; Single excitation; Visible light region; X ray photoelectron spectroscopy
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/9708

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