Tuning sulfur doping in graphene for highly sensitive dopamine biosensors

Li, Mingjie; Liu, Chenming; Zhao, He; An, Huijiao; Cao, Hongbin; Zhang, Yi; Fan, Zhuangjun

doi:10.1016/j.carbon.2015.01.029

Cited by 87 publications

(42 citation statements)

References 57 publications

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“…As seen, bare GCE exhibits a negligible EOD activity as evidenced by the weak peak current (I p ) and broad peak-to-peak separation (△E), whereas the RGO/GCE shows a slightly improved EOD activity due to the strong π-π interactions between the phenyl moiety of DA molecule and π-conjugation of graphene [40,41]. In addition, the PG/GCE presents a noticeably higher I p and narrower △E compared to RGO/GCE, suggesting the much improved EOD activity as a result of P-doping, correlating well with the previous reports associated with the N-doping [42] and S-doping [43] for improving the EOD activity of graphene. Notably, after plasma treatment, the PG-E/GCE exhibits the best EOD activity with the highest I p and narrowest △E.…”

Section: Evaluation Of Pg-e For Da Sensingsupporting

confidence: 87%

Phosphorus doped and defects engineered graphene for improved electrochemical sensing: synergistic effect of dopants and defects

Chu

Wang

Tian

et al. 2017

Electrochimica Acta

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Heteroatom-doped graphene materials emerged as promising metal-free catalysts have recently attracted a growing interest in electrochemical sensing applications. However, their catalytic activity and sensing performances still need to be further improved. Herein, we reported the development of unique phosphorus (P)-doped and plasma-etched graphene (denoted as PG-E) as an efficient metal-free electrocatalyst for dopamine (DA) sensing. It was demonstrated that introducing both P-dopants and plasma-engineered defects in graphene could synergistically improve the activity toward electrocatalytic oxidation of DA by increasing the accessible active sites and promoting the electron transport capability. The resulting PG-E modified electrode showed exceptional DA sensing performances with low detection limit, high selectivity and good stability. These results suggested that the synergistic effect of dopants and defects might be an important factor for developing the advanced graphene-based metal-free catalysts for electrochemical sensing.

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Section: Evaluation Of Pg-e For Da Sensingsupporting

confidence: 87%

Phosphorus doped and defects engineered graphene for improved electrochemical sensing: synergistic effect of dopants and defects

Chu

Wang

Tian

et al. 2017

Electrochimica Acta

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“…Recently, doped carbon has been commonly used in biosensors as a result of its larger functional surface area, more biocompatible microenvironment and higher electrical conductivity [ 16 , 17 ]. Some researchers reported carbonizing renewable biomass is more effective to enhance electrochemical properties [ 18 – 20 ].…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive and Selective Hydrogen Peroxide Biosensor Based on Gold Nanoparticles and Three-Dimensional Porous Carbonized Chicken Eggshell Membrane

et al. 2015

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A sensitive and noble amperometric horseradish peroxidase (HRP) biosensor is fabricated via the deposition of gold nanoparticles (AuNPs) onto a three-dimensional (3D) porous carbonized chicken eggshell membrane (CESM). Due to the synergistic effects of the unique porous carbon architecture and well-distributed AuNPs, the enzyme-modified electrode shows an excellent electrochemical redox behavior. Compared with bare glass carbon electrode (GCE), the cathodic peak current of the enzymatic electrode increases 12.6 times at a formal potential of −100mV (vs. SCE) and charge-transfer resistance decreases 62.8%. Additionally, the AuNPs-CESM electrode exhibits a good biocompatibility, which effectively retains its bioactivity with a surface coverage of HRP 6.39×10−9 mol cm−2 (752 times higher than the theoretical monolayer coverage of HRP). Furthermore, the HRP-AuNPs-CESM-GCE electrode, as a biosensor for H2O2 detection, has a good accuracy and high sensitivity with the linear range of 0.01–2.7 mM H2O2 and the detection limit of 3μM H2O2 (S/N = 3).

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“…Van der Waals interaction, Hbonding, π-π stacking, co-ordination bonding are all included in non-covalent modification ways in which covalent bonding modification of GR can be done by doping heteroatoms (such as B, N, P, S etc.). [79] GO is another 2-D carbon material that is derived from GR exfoliation. GO carry different oxygenated groups, such as epoxide, carbonyl, carboxyl, and hydroxyl groups, due to more oxygen-containing functional groups.…”

Section: Modifiers or Electrode Materials Employed In Da Detectionmentioning

confidence: 99%

Graphene and Carbon Nanotube‐based Electrochemical Sensing Platforms for Dopamine

Islam

Shah

Naher

et al. 2021

Chemistry An Asian Journal

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Dopamine (DA) is an important neurotransmitter, which is created and released from the central nervous system. It plays a crucial role in human activities, like cognition, emotions, and response to anything. Maladjustment of DA in human blood serum results in different neural diseases, like Parkinson's and Schizophrenia. Consequently, researchers have started working on DA detection in blood serum, which is undoubtedly a hot research area. Electrochemical sensing techniques are more promising to detect DA in real samples. However, utilizing conventional electrodes for selective determination of DA encounters numerous problems due to the coexistence of other materials, such as uric acid and ascorbic acid, which have an oxidation potential close to DA. To overcome such problems, researchers have put their focus on the modification of bare electrodes. The aim of this review is to present recent advances in modifications of most used bare electrodes with carbonaceous materials, especially graphene, its derivatives, and carbon nanotubes, for electrochemical detection of DA. A brief discussion about the mechanistic phenomena at the electrode interface has also been included in this review.

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Tuning sulfur doping in graphene for highly sensitive dopamine biosensors

Cited by 87 publications

References 57 publications

Phosphorus doped and defects engineered graphene for improved electrochemical sensing: synergistic effect of dopants and defects

Phosphorus doped and defects engineered graphene for improved electrochemical sensing: synergistic effect of dopants and defects

A Highly Sensitive and Selective Hydrogen Peroxide Biosensor Based on Gold Nanoparticles and Three-Dimensional Porous Carbonized Chicken Eggshell Membrane

Graphene and Carbon Nanotube‐based Electrochemical Sensing Platforms for Dopamine

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