Carbon quantum dot-based nanoprobes for metal ion detection

Gao, Xiaohui; Du, Cuicui; Zhuang, Zhihua; Chen, Wei

doi:10.1039/c6tc02055k

Cited by 425 publications

(182 citation statements)

References 240 publications

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“…The coordinate bond enables the excited electrons to easily transfer from the fullerenol to the empty d orbital of Cu 2+ ions, thus hindering photoluminescence and accounting for the fluorescence quenching. These conclusions gain support from previous reports . The association constant ( K ) of the complexes can be obtained from the Benesie–Hildebrand Equation :

true \frac{1}{F_{0} - F} = \frac{1}{F_{0} - F_{\max}} = \frac{1}{K \times (F_{0} - F_{\max}) \times [Cu^{2 +}]}

…”

Section: Resultssupporting

confidence: 83%

“…The limit of detection (LOD), defined as a change of 10 % in emission intensity, was calculated to be 3.50 μmol L −1 . The sensing of Cu 2+ ions by other PL nanomaterials, such as C dots, has also been reported . Although the LOD achieved by the fullerenols in the current study is not the lowest among the reported results, the LOD value is considered sufficient to detect the overbalance of Cu 2+ ions in environmental science, and even in food chemistry when considering the high biocompatibility of fullerenols.…”

Section: Resultsmentioning

confidence: 53%

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Fullerenols Revisited: Highly Monodispersed Photoluminescent Nanomaterials as Ideal Building Blocks for Supramolecular Chemistry

Zhou

Zhang

Feng

et al. 2018

Chemistry A European J

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Fullerenols have been known for decades; however, the photoluminescent (PL) properties and applications in supramolecular chemistry of these molecules have not been well addressed. Herein, a strategy has been developed to purify the as-prepared fullerenols, and the photoluminescence and capabilities of these molecules to form supramolecular self-assemblies were systematically studied. It was found that fullerenols show wavelength-dependent emission with an absolute fluorescent quantum yield of approximately 3.5 %. The PL characteristics are reminiscent of carbon dots, especially those obtained by using the top-down method. The studied fullerenols can be used to detect Cu ions with a limit of detection down to 3.50 μm. In addition, the amphiphilicity of the fullerenols can be readily tuned by ionic complexation with cationic surfactants, such as 1-tetradecyl-3-methylimidazoliumbromide (C mimB) and tetradecyltrimethylammonium bromide (TTAB). On increasing the concentration of the surfactant, the transition of aggregates was induced from highly ordered vesicles to honeycomb-structured crystals and finally to giant micelles. After the formation of supramolecular self-assemblies, enhancement of photoluminescence was observed, which can be ascribed to the suppression of intramolecular vibrations and motion combined with the loosely packed self-assembly array. This study provides a facile way to generate PL nanoarchitectures, which may find applications in fluorescent sensing, drug delivery, and optoelectronics.

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true \frac{1}{F_{0} - F} = \frac{1}{F_{0} - F_{\max}} = \frac{1}{K \times (F_{0} - F_{\max}) \times [Cu^{2 +}]}

…”

Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 53%

Fullerenols Revisited: Highly Monodispersed Photoluminescent Nanomaterials as Ideal Building Blocks for Supramolecular Chemistry

Zhou

Zhang

Feng

et al. 2018

Chemistry A European J

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show abstract

“…17,18 CDs with size below 10 nm show strong fluorescence with tunable emission, good photostability, excellent biocompatibility and easy functionalization. [19][20][21] Because of these properties, various researches have investigated their applications. [22][23][24] Chen et al synthesized CDs for label-free detection of Hg 2+ and Ag + .…”

Section: Introductionmentioning

confidence: 99%

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

et al. 2016

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A simple method was designed for detecting cobalt ions (Co 2+ ) based on the analyte induced fluorescence quenching of carbon dots (CDs). CDs with a quantum yield of 38.7% were synthesized by hydrothermal treatment of carbopol 934 and diethylenetriamine. Through the metal-ligand interaction, the prepared CDs can highly sensitive and selective detection of Co 2+ . The color changes (from transparent to brown) of the solution can be clearly seen with naked eye. This effective sensing platform shows high sensitivity and selectivity towards Co 2+ . Moreover, the CDs are also successfully utilized for monitoring natural water quality about Co 2+ contents.

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“…Cdots, with their highly luminescent and photo‐electrochemical properties, can act as good electron donors or acceptors, which leads to various opportunities in light‐energy conversion, light‐emitting diodes, and white‐light emission, photoreduction, and related photocatalytic reactions . The carbon‐based nanomaterials, along with graphene quantum dots and their metal‐nanoparticle‐based nanocomposites, have been successfully applied for the efficient detection of metal ions, such as Ag + , Fe 3+ , and Hg 2+ , and also biologically relevant molecules, such as glutathione and hydrogen peroxide, in both aqueous media and biological samples …”

Section: Introductionmentioning

confidence: 99%

An Interactive Quantum Dot and Carbon Dot Conjugate for pH‐Sensitive and Ratiometric Cu²⁺ Sensing

et al. 2017

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Herein we report the photoinduced electron transfer from Mn -doped ZnS quantum dots (Qdots) to carbon dots (Cdots) in an aqueous dispersion. We also report that the electron transfer was observed for low pH values, at which the oppositely charged nanoparticles (NPs) interacted with each other. Conversely, at higher pH values the NPs were both negatively charged and thus not in contact with each other, so the electron transfer was absent. Steady-state and time-resolved photoluminescence studies revealed that interacting particle conjugates were responsible for the electron transfer. The phenomenon could be used to detect the presence of Cu ions, which preferentially, ratiometrically, and efficiently quenched the luminescence of the Qdots.

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Carbon quantum dot-based nanoprobes for metal ion detection

Abstract: This review highlights the synthesis and optical properties of carbon quantum dots and their application in metal ion sensing.

Cited by 425 publications

References 240 publications

Fullerenols Revisited: Highly Monodispersed Photoluminescent Nanomaterials as Ideal Building Blocks for Supramolecular Chemistry

Fullerenols Revisited: Highly Monodispersed Photoluminescent Nanomaterials as Ideal Building Blocks for Supramolecular Chemistry

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

An Interactive Quantum Dot and Carbon Dot Conjugate for pH‐Sensitive and Ratiometric Cu²⁺ Sensing

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Carbon quantum dot-based nanoprobes for metal ion detection

Abstract: This review highlights the synthesis and optical properties of carbon quantum dots and their application in metal ion sensing.

Cited by 425 publications

References 240 publications

Fullerenols Revisited: Highly Monodispersed Photoluminescent Nanomaterials as Ideal Building Blocks for Supramolecular Chemistry

Fullerenols Revisited: Highly Monodispersed Photoluminescent Nanomaterials as Ideal Building Blocks for Supramolecular Chemistry

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

An Interactive Quantum Dot and Carbon Dot Conjugate for pH‐Sensitive and Ratiometric Cu2+ Sensing

Contact Info

Product

Resources

About

An Interactive Quantum Dot and Carbon Dot Conjugate for pH‐Sensitive and Ratiometric Cu²⁺ Sensing