The DOI matches its Crossref record; 29 of the 29 references it cites were found in a registry or an index.
Carbon Dots Based Dual-Emission Silica Nanoparticles as a Ratiometric Nanosensor for Cu2+
Abstract
A simple and effective strategy for designing ratiometric fluorescent nanosensor has been described in this work. A carbon dots (CDs) based dual-emission nanosensor for Cu(2+) detection was prepared by coating CDs on the surface of Rhodamine B-doped silica nanoparticles. The fluorescent CDs were synthesized using N-(β-aminoethyl)-γ-aminopropyl methyldimethoxysilane (AEAPMS) as the main raw material, so that the residual ethylenediamine groups and methoxysilane groups on the surface of CDs can serve as the Cu(2+) recognition sites and the silylation reaction groups. The obtained nanosensor showed characteristic fluorescence emissions of Rhodamine B (red) and CDs (blue) under a single excitation wavelength. Upon binding to Cu(2+), only the fluorescence of CDs was quenched, resulting in the ratiometric fluorescence response of the dual-emission silica nanoparticles. This ratiometric nanosensor exhibited good selectivity to Cu(2+) over other substances, such as metal ions, amino acids, proteins, and vitamin C. The ratio of F467/F585 linearly decreased with the increasing of Cu(2+) concentration in the range of 0 to 3 × 10(-6) M, a detection limit as low as 35.2 nM was achieved. Additionally, this nanosensor was successfully applied for the ratiometric fluorescence imaging of Cu(2+) in cells and determination of Cu(2+) in real tap water.
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Metadata
- Authors
- Liu, X., Zhang, N., Bing, T., & Shangguan, D.
- Venue
- Analytical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-02-07
- Volume
- 86
- Issue
- 5
- Pages
- 2289-2296
- ISSN
- 0003-2700 (ISSN-L)
- 1520-6882
- OpenAlex
- W2330768282
- Cited by
- 308
- References
- 29
- FWCI
- 18.02
- Type
- journal article
- Language
- en
- Open access
- closed
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