Reduced graphene oxide-carbon dots composite as an enhanced material for electrochemical determination of dopamine

Hu, Shirong; Huang, Qitong; Lin, Yi; Wei, Chan; Zhang, Hanqiang; Zhang, Wuxiang; Guo, Zhenbo; Bao, Xiuxiu; Shi, Jiangu; Hao, Aiyou

doi:10.1016/j.electacta.2014.02.150

Cited by 129 publications

(58 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, the selective determination of DA continues to challenge researchers. Now, a number of materials, such as metal complexes [12], nanoparticles [13], organics [14], and self-assembled molecular films [15], have been utilized as modifiers to fabricate highly selective DA sensors and solve problems associated with their use.…”

Section: Introductionmentioning

confidence: 99%

Application of graphene oxide/lanthanum-modified carbon paste electrode for the selective determination of dopamine

Feng

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Application of graphene oxide/lanthanum-modified carbon paste electrode for the selective determination of dopamine

Feng

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

“…Cdots have not only increased the stability, but also promoted interactions with amino groups in DA via electrostatic interactions to increase recognition DA with high specificity. [31].…”

Section: Resultsmentioning

confidence: 99%

“…It is well established in literature that the oxidation peak potentials for AA and DA are essentially identical and thus it is difficult to separate these compounds due to their overlapping signals on a bare GCE [31]. This problem can be resolved via electrostatic attractions.…”

Section: Interference Effectmentioning

confidence: 99%

“…Compared with conventional semiconductor quantum dots or metal quantum dots, carbon dots (Cdots) are a new class of carbon nanomaterials that are superior due to their low cytotoxicity, excellent biocompatibility, facile synthesis, cost-effective, remarkable conductivity, high aqueous solubility, and favorable optical properties. The C-dots can provide an abundant source of carboxyl groups and/or amino groups at the surface that can significantly enhance the redox response of dopamine [29].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced voltammetric determination of dopamine using a glassy carbon electrode modified with ionic liquid-functionalized graphene and carbon dots

Zhuang

Wang

et al. 2016

Microchim Acta

View full text Add to dashboard Cite

The authors describe a dopamine (DA) sensor based on a glassy carbon electrode modified with a composite film composed of carbon dots (C-dots) and graphene functionalized with an ionic liquid. The C-dots were functionalized with carboxy groups whose negative charge promotes electrostatic attraction to the protonated amino groups in DA. The presence of an imidazole cation in the IL facilitates interaction with the C-dots and DA via electrostatic interactions and π-stacking forces. Under optimal conditions, the modified GCE display improved electrochemical response to DA compared to a bare GCE, or a GCE modified with C-dots or IL-graphene only. The oxidation current, measured best at a potential of 0.22 V (vs. Ag/AgCl) is linearly related to the DA concentration in the 0.1 to 600 μM range, with a 30 nM detection limit at a signal-to-noise ratio of 3. Ascorbic acid does not interfere even in large excess, and the sensor is stable for at least a month. The modified GCE was applied to the determination of DA in spiked fetal bovine serum and gave satisfactory results.

show abstract

“…A significant amount of work also focused on development of graphene-based materials for sensing applications, mostly for detection of bio-relevant molecules, including glucose [14], cytochrome c [145], or dopamine [146,147] although sensors of inorganic molecules such as hydrogen peroxide [148], cadmium [149], or protons/hydronium ions [150] were also successfully fabricated [6].…”

Section: Modification and Doping Of Graphene For Applications In Elecmentioning

confidence: 99%

Electrochemistry of Graphene

Patten¹,

Velický²,

Dryfe³

2015

Advances in Electrochemical Sciences and Engineering

View full text Add to dashboard Cite

Reduced graphene oxide-carbon dots composite as an enhanced material for electrochemical determination of dopamine

Cited by 129 publications

References 26 publications

Application of graphene oxide/lanthanum-modified carbon paste electrode for the selective determination of dopamine

Application of graphene oxide/lanthanum-modified carbon paste electrode for the selective determination of dopamine

Enhanced voltammetric determination of dopamine using a glassy carbon electrode modified with ionic liquid-functionalized graphene and carbon dots

Electrochemistry of Graphene

Contact Info

Product

Resources

About