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Green synthesis of carbon dots using expired agar for a label-free fluorescence signal-amplified detection of ferric ion utilizing oxalate functionalization
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Achadu, Ojodomo J., Elizur, Gideon L., Boye, ThankGod E. and Park, Enoch Y. (2022) Green synthesis of carbon dots using expired agar for a label-free fluorescence signal-amplified detection of ferric ion utilizing oxalate functionalization. Materials Advances, 3 . pp. 6307-6315. doi:10.1039/d2ma00567k ISSN 2633-5409.
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WRAP-green-synthesis-carbon-dots-using-expired-agar-label-free-fluorescence-signal-amplified-detection-ferric-ion-utilizing-oxalate-functionalization-Achadu-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution. Download (4Mb) | Preview |
Official URL: https://doi.org/10.1039/d2ma00567k
Abstract
Surface passivation strategies for functional carbon-based nanoparticles can provide unrivalled performance whilst fine-tuning their optical properties in addition to giving routes for large-scale syntheses. Herein, the synthesis of highly fluorescent agar-derived and oxalate-functionalized carbon dots (ag-oxCDs) is presented. We deployed a facile hydrothermal protocol, using expired potato dextrose agar and oxalate as “green” precursors to prepare fluorescent ag-oxCDs with a relative fluorescence (FL) quantum yield of ∼32% (emission/excitation wavelengths: 445/340 nm). The switchable fluorescence properties of the prepared ag-oxCDs was used for developing a sensitive nanosensor for ferric ion [Fe(III)] detection. Through Fe(III) coordination to the oxalate passivated surface of ag-oxCDs, the FL of ag-oxCDs was enhanced by an aggregation-induced emission enhancement mechanism. The tested and optimized concentration of Fe(III) was within a broad linear range of 0.5–1500 μM, with a detection limit of 75 nM (s/N = 3). The practical application of the ag-oxCDs-based FL nanosensor for real-time quantitative monitoring of Fe(III) was demonstrated by detecting up to 0.15 μM of Fe(III) in spiked human serum and water samples.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QD Chemistry T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
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| Divisions: | Other > Institute of Advanced Study Faculty of Science, Engineering and Medicine > Science > Chemistry |
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| SWORD Depositor: | Library Publications Router | |||||||||
| Library of Congress Subject Headings (LCSH): | Agar, Carbon, Nanoparticles -- Synthesis, Nanostructured materials -- Optical properties, Fluorescence, Iron ions, Oxalates, Green technology | |||||||||
| Journal or Publication Title: | Materials Advances | |||||||||
| Publisher: | Royal Society of Chemistry | |||||||||
| ISSN: | 2633-5409 | |||||||||
| Official Date: | 2022 | |||||||||
| Dates: |
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| Volume: | 3 | |||||||||
| Page Range: | pp. 6307-6315 | |||||||||
| DOI: | 10.1039/d2ma00567k | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Date of first compliant deposit: | 15 September 2022 | |||||||||
| Date of first compliant Open Access: | 15 September 2022 | |||||||||
| RIOXX Funder/Project Grant: |
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