Simple and Cost-Effective Glucose Detection Based on Carbon Nanodots Supported on Silver Nanoparticles
We present a new glucose oxidase (GOx)-mediated strategy for detecting glucose based on carbon nanodots supported on silver nanoparticles (C-dots/AgNPs) as nanocomplexes. The strategy involves three processes: quenching of C-dots' fluorescence by AgNPs, production of H^sub 2^O^sub 2^ from GOx-catalyzed oxidation of glucose, and H^sub 2^O^sub 2^-induced etching of AgNPs. In the C-dots/AgNPs complex, AgNPs act as a "nanoquencher" to decrease C-dots fluorescence by surface plasmon-enhanced energy transfer (SPEET) from C-dots (donor) to AgNPs (acceptor). The H^sub 2^O^sub 2^ formed by GOx-catalyzed oxidation of glucose etches the AgNPs to silver ions, thus freeing the C-dots from the AgNPs surfaces and restoring the C-dots' fluorescence. Therefore, the increase in fluorescence depends directly on the concentration of H^sub 2^O^sub 2^, which, in turn, depends on the concentration of glucose. The strategy allows the quantitative analysis of glucose with a detection limit of 1.39 ...M. The method based on C-dots/AgNPs offers the following advantages: simplicity of design and facile preparation of nanomaterials, as well as low experimental cost, because chemical modification and separation procedures are not needed. (ProQuest: ... denotes formulae/symbols omitted.).
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2017 |
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| Erschienen: |
2017 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:89 |
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| Enthalten in: |
Analytical chemistry - 89(2017), 2, Seite 1323 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Jin-Liang Ma [VerfasserIn] |
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| 520 | |a We present a new glucose oxidase (GOx)-mediated strategy for detecting glucose based on carbon nanodots supported on silver nanoparticles (C-dots/AgNPs) as nanocomplexes. The strategy involves three processes: quenching of C-dots' fluorescence by AgNPs, production of H^sub 2^O^sub 2^ from GOx-catalyzed oxidation of glucose, and H^sub 2^O^sub 2^-induced etching of AgNPs. In the C-dots/AgNPs complex, AgNPs act as a "nanoquencher" to decrease C-dots fluorescence by surface plasmon-enhanced energy transfer (SPEET) from C-dots (donor) to AgNPs (acceptor). The H^sub 2^O^sub 2^ formed by GOx-catalyzed oxidation of glucose etches the AgNPs to silver ions, thus freeing the C-dots from the AgNPs surfaces and restoring the C-dots' fluorescence. Therefore, the increase in fluorescence depends directly on the concentration of H^sub 2^O^sub 2^, which, in turn, depends on the concentration of glucose. The strategy allows the quantitative analysis of glucose with a detection limit of 1.39 ...M. The method based on C-dots/AgNPs offers the following advantages: simplicity of design and facile preparation of nanomaterials, as well as low experimental cost, because chemical modification and separation procedures are not needed. (ProQuest: ... denotes formulae/symbols omitted.) | ||
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