Green synthesis of orange emissive carbon dots for the detection of Ag+ and their application via solid-phase sensing and security ink
- 12 October 2021
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 33 (3), 035709
- https://doi.org/10.1088/1361-6528/ac2f25
Abstract
Fluorescent carbon dots (CDs) have attracted considerable interest due to their superior optical properties and facile preparation. In this work, O-phenylenediamine and melamine were used as precursors for the one-step hydrothermal synthesis of novel orange emissive carbon dots (O-CDs) in an aqueous solution. The fluorescence intensity (580 nm) of the O-CDs exhibited a good linear relationship with Ag+ in the range of 0.0-50.0 μM with the detection limit of 0.289 μM. Moreover, the O-CDs were successfully used to determine Ag+ in biological samples (Hela cells) because of their low cytotoxicity, and good biocompatibility. Besides, the O-CDs-doped solid-phase detection materials (test paper and hydrogel) were employed to monitor Ag+ qualitatively and quantitatively, indicated that the O-CDs had a great capacity for the detection of Ag+ in biological and environmental areas. Based on their extraordinary fluorescence property, the O-CDs could also be used as security ink. Overall, based on their excellent fluorescent performance, the CDs in this study have significant potential for practical application toward solid-phase sensing and security ink.Keywords
Funding Information
- National Natural Science Foundation of China (21807085)
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