Study of Heterogeneous Electron Transfer on the Graphene/Self-Assembled Monolayer Modified Gold Electrode by Electrochemical Approaches

Xie, Xiang; Zhao, Keke; Xu, Xiaochuan; Zhao, Wenbo; Liu, Shujuan; Zhu, Zhiwei; Li, Meixian; Shi, Zujin; Shao, Yuanhua

doi:10.1021/jp102446w

Cited by 78 publications

(40 citation statements)

References 74 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corresponding apparent heterogeneous electron‐transfer rate constants have been also estimated at 100 mV/s, as scan rate, by CV, according to our previous work . The kinetic results , are highlighted on Table , where it is possible to recognize the highest value of the heterogeneous apparent electron‐transfer kinetic constant in presence of FB‐SPE devices. This means that the FB‐SPE sensor catalyzes the redox reversible electron‐transfer reaction of hexaammineruthenium (III) chloride, better than the others modified electrodes (as shown on Figure S2 and Table S2).…”

Section: Resultsmentioning

confidence: 99%

Fullerene Black Modified Screen Printed Electrodes for the Quantification of Acetaminophen and Guanine

Valentini

Ciambella

Cataldo³

et al. 2017

Electroanalysis

View full text Add to dashboard Cite

Fullerene Black (FB) and Extracted Fullerene Black (EFB) were used in modified screen‐printed electrodes producing electrochemical transducers (FB‐SPEs and EFB‐SPEs). A complete electrochemical study was performed and the best results are obtained working with FB‐SPEs, especially in terms of: 1. improved electron‐transfer kinetic mechanisms and 2. sensitivity and selectivity toward Acetaminophen (Ac) and Guanine (G). These latter represent two important electro‐active targets to quantify in medicine field application, because: Ac is a preferred alternative (as analgesic‐antipyretic agent) to aspirin, particularly for patients who cannot tolerate aspirin; the oxidation signal of G is useful for the fabrication of emerging analytical tools, such as DNA chipsand user‐friendly diagnostic devices. Ac and G are quantify by using FB‐SPEs electrochemical devices, with an extended linearity (1–300 μM for Ac; 0.1–300 μM for G), an excellent sensitivity (2.82 μA μM−1 cm−2 in the case of Ac; and 0.183 μA μM−1 cm−2 in the case of G), a low detection limit (0.01 μM for Ac; 0.005 μM for G), a very good reproducibility (both: intra‐; inter‐electrodes reproducibility RSD % ranging from 0.3–0.5 for Ac; and 0.50–0.85 for G) and a very fast response time (6 s for Ac; 5 s in the case of G). In addition, high selectivity is obtained at FB‐SPEs, meaning that the FB‐SPEs electrochemical transducers are suitable to simultaneously quantify Ac and G in real samples, having several different (highly concentrated) interference.

show abstract

Section: Resultsmentioning

confidence: 99%

Fullerene Black Modified Screen Printed Electrodes for the Quantification of Acetaminophen and Guanine

Valentini

Ciambella

Cataldo³

et al. 2017

Electroanalysis

View full text Add to dashboard Cite

show abstract

“…Xie et al used graphene nanosheets prepared by arc-discharge method to modify n-octadecyl mercaptan self-assembled monolayer (SAM) on a gold electrode. The Au electrode was firstly deactivated by SAM deposition, however, upon placement of the graphene nanosheets on the SAM, the electron transfer was restored as confirmed using CV and scanning electrochemical microscopy (SECM) with Ru(NH 3 ) 6 3+/2+ mediator [109]. Questions remain as to whether the restored electroactivity originates from incorporation of graphene into the SAM or a physical contact between the nanosheets and Au surface.…”

Section: Iinear Diffusionmentioning

confidence: 98%

Electrochemistry of Graphene

Patten¹,

Velický²,

Dryfe³

2015

Advances in Electrochemical Sciences and Engineering

View full text Add to dashboard Cite

“…Xie et al investigated the electrochemical behaviors of graphene sheets attached to a SAM (n-octadecyl mercaptan) on a gold electrode (Figure 25). Their studies revealed that the heterogeneous electron transfer blocked by the SAM layer can be restored by graphene sheets, and the graphene-/SAM-modified Au electrode had a smaller interfacial capacitance, as compared with that of a bare one [69].…”

Section: Graphene Synthesis By Sammentioning

confidence: 99%

Applications of Graphene Modified by Self-Assembled Monolayers

Ersü¹,

Gokpek²,

Can³

et al. 2020

Advances in Condensed-Matter and Materials Physics - Rudimentary Research to Topical Technology

View full text Add to dashboard Cite

Self-assembled monolayers (SAMs) are well-oriented molecular structures that are formed by the adsorption of an active site of a surfactant onto a substrate's surface. Aromatic SAMs were used to modify anode/hole transport layer interface in order to achieve preferable barrier alignment and charge carrier injection from anode to an organic-based thin film material. Other functions of SAMs include current blocking layers or moisture penetration blocking layers, dipolar surface layers for enhanced charge injection, and modification of work function of a material such as graphene acting as a spacer to physically separate and electrically decouple it from the substrate. Additionally, SAM modification of graphene leads to its electronic passivation at layers' edges, elimination of defects, and enhanced adhesion and stability. The surface modification with molecules capable of forming SAM is a fast, simple, low-cost, and effective technique for the development of novel materials especially for the production of electronic devices. The ability to modify its properties by SAM technique has opened up a wide range of applications in electronic and optoelectronic devices.

show abstract

Study of Heterogeneous Electron Transfer on the Graphene/Self-Assembled Monolayer Modified Gold Electrode by Electrochemical Approaches

Cited by 78 publications

References 74 publications

Fullerene Black Modified Screen Printed Electrodes for the Quantification of Acetaminophen and Guanine

Fullerene Black Modified Screen Printed Electrodes for the Quantification of Acetaminophen and Guanine

Electrochemistry of Graphene

Applications of Graphene Modified by Self-Assembled Monolayers

Contact Info

Product

Resources

About