Carbon-based dots for electrochemiluminescence sensing

Chen, Ying; Cao, Yue; Ma, Cheng; Zhu, Jun‐Jie

doi:10.1039/c9qm00572b

Cited by 82 publications

(52 citation statements)

References 213 publications

(210 reference statements)

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“…An attractive light emitting material for use in LECs is carbon quantum dots (CQDs) due to efficient visible light emissions with tunable band gaps (Yuan et al, 2018 ; Qin et al, 2019 ; Chen et al, 2020a ). First discovered in 2004 (Xu et al, 2004 ), CQDs are small sp 2 and sp 3 containing carbon particles that have been defined as having sizes below 20 nm, low toxicity, strong chemical stability and a resistance to photobleaching (Gan et al, 2016 ; Hu et al, 2019 ; Chen et al, 2020b ). This study will use ECL spectroscopy to evaluate CQD's electron and hole transport mechanisms and the efficiency of radiative recombination for applications in optoelectronic.…”

Section: Introductionmentioning

confidence: 99%

Efficient White Electrochemiluminescent Emission From Carbon Quantum Dot Films

et al. 2020

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Carbon quantum dots (CQDs) were manufactured from citric acid and urea in a gram-scale synthesis with a controlled size range between 1. 5 and 23.8 nm. The size control was realized by varying volume of the precursor solution in a hydrothermal synthesis method. The prepared CQDs were investigated using electrochemiluminescence (ECL) spectroscopy at interfaces of their electrode films and electrolyte solution containing coreactants rather than conventional optoelectronic tests, providing an in-depth analysis of light-emission mechanisms of the so-called half-cells. ECL from the CQD films with TPrA and K 2 S 2 O 8 as coreactants provided information on the stability of the CQD radicals in the films. It was discovered that CQD •− has a powerful electron donating nature to sulfate radical to generate ECL at a relative efficiency of 96% to the Ru(bpy) 3 Cl 2 /K 2 S 2 O 8 coreactant system, indicating a strong performance in light emitting applications. The smaller the CQD particle sizes, the higher the ECL efficiency of the film interface, most likely due to the increased presence of surface states per mass of CQDs. Spooling ECL spectroscopy of the system revealed a potential-dependent light emission starting from a deep red color to blue-shifted intensity maximum, cool bright white emission with a correlated color temperature of 3,200 K. This color temperature is appropriate for most indoor lighting applications. The above ECL results provide information on the performance of CQD light emitters in films, permitting preliminary screening for light emitting candidates in optoelectronic applications. This screening has revealed CQD films as a powerful and cost-effective light emitting layer toward lighting devices for indoor applications.

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Section: Introductionmentioning

confidence: 99%

Efficient White Electrochemiluminescent Emission From Carbon Quantum Dot Films

et al. 2020

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“…CNDs have disclosed interesting features as nanomaterials for photoinduced electron transfer and ECL. In the last one, CNDs have demonstrated their ability to act as co-reactants [ 142 ], which is why this nanomaterial is widely used in the development of ECL biosensors [ 143 ].…”

Section: Ecl Enzymatic Biosensorsmentioning

confidence: 99%

Electrochemiluminescence Biosensors Using Screen-Printed Electrodes

et al. 2020

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Electrogenerated chemiluminescence (also called electrochemiluminescence (ECL)) has become a great focus of attention in different fields of analysis, mainly as a consequence of the potential remarkably high sensitivity and wide dynamic range. In the particular case of sensing applications, ECL biosensor unites the benefits of the high selectivity of biological recognition elements and the high sensitivity of ECL analysis methods. Hence, it is a powerful analytical device for sensitive detection of different analytes of interest in medical prognosis and diagnosis, food control and environment. These wide range of applications are increased by the introduction of screen-printed electrodes (SPEs). Disposable SPE-based biosensors cover the need to perform in-situ measurements with portable devices quickly and accurately. In this review, we sum up the latest biosensing applications and current progress on ECL bioanalysis combined with disposable SPEs in the field of bio affinity ECL sensors including immunosensors, DNA analysis and catalytic ECL sensors. Furthermore, the integration of nanomaterials with particular physical and chemical properties in the ECL biosensing systems has improved tremendously their sensitivity and overall performance, being one of the most appropriates research fields for the development of highly sensitive ECL biosensor devices.

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“…This, occasionally, results in reduced stability in the immunosensor. Further specific tailoring of the CQDs functionalities is needed (Chen et al, 2020 ; Zhong et al, 2020 ).…”

Section: Application Of Carbon Quantum Dots In Immunoassaysmentioning

confidence: 99%

“…Here we highlighted the most recent advanced procedures on the luminescence features of CQDs. Alternatively, based on easy modifications with antigens and antibodies and good conductivity of CQDs one can develop electrochemical and electrochemiluminescence (ECL) studies toward various detecting proposes including immunoassay sensing (Zhou et al, 2014 ; Chen et al, 2020 ). This approach can be further expanded in solid-state electrochemical and ECL investigations by employing surface functionalities of CQDs and generate background free signals toward detection.…”

Section: Perspective and Future Workmentioning

confidence: 99%

“…Carbon quantum dots (CQDs) are a newly developed division of carbon-based nanomaterials (e.g., nanodiamond, fullerenes, carbon nanotubes, graphene, and graphene oxide) which are environmentally friendly, chemically stable, and reasonably conductive (Lim et al, 2015 ; Cayuela et al, 2016 ; Liu et al, 2016 ; Namdari et al, 2017 ; Molaei, 2020 ). These basic properties have attracted a wide range of researchers to employ CQDs in various applications including biomedical and biotechnological applications (Namdari et al, 2017 ; Iravani and Varma, 2020 ), dye-synthesized solar cells (Gao et al, 2020 ), light-emitting devices, (Yuan et al, 2018 ; He et al, 2020 ) imaging and bioimaging (Zhu et al, 2012 ; Jiang et al, 2015a ; Smith and Gambhir, 2017 ; Panwar et al, 2019 ; Liu Y. et al, 2020 ), electrochemical and electrochemiluminescence studies (Wang and Dai, 2015 ; Fiorani et al, 2019 ; Wang et al, 2019 ; Chen et al, 2020 ; Kour et al, 2020 ; Zhong et al, 2020 ), and sensing (Li et al, 2019 ; Huang et al, 2020 ; Molaei, 2020 ; Tajik et al, 2020 ). More importantly, CQDs possess outstanding optical features, including a bright and tunable luminescence emission within a wide range of wavelengths (Sun et al, 2006 ; Wang et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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