Nanocomposite of electrochemically reduced graphene oxide and gold nanoparticles enhanced electrochemilunescence of peroxydisulfate and its immunosensing abililty towards human IgG

Electrochemical co-reduction synthesis of graphene/nano-gold composites and its application to electrochemical glucose biosensor

“…A c c e p t e d M a n u s c r i p t 9 of GO. The peak appeared at around 1373 cm -1 (D-band) was related to the defects or disorder in the hexagonal graphitic layers and the peak at about 1607 cm -1 (G-band) was related to the vibration of the sp 2 -bonded carbon atoms in a two-dimensional hexagonal lattice [19]. In the Raman spectrum of graphene-nano-Au composites both the D-band and G-band still existed, but the intensity ratio of D-band and G-band (1.16) was higher than that of GO (0.82) due to the increase of defects, which suggested the successful reduction of GO to the graphene [38].…”

“…due to the redox of Fe 2+ /Fe 3+ . At graphene oxide modified electrode (GO/GCE), the peak current of redox had a significant decrease and the peak separation (ΔE p ) had a large increase compared with bare GCE, which was attributed to the electrical insulating properties of GO [19]. After GO and HAuCl 4 was co-reduced to form graphene/nano-Au composites, the resulting graphene/nano-Au/GCE exhibited an enhanced peak current and a decreased peak separation (ΔE p ).…”

“…Nowadays, electrochemical reduction has already been employed to reduce graphene oxide (GO), which will eliminate oxygenated defect sites as well as improve its electric properties [19]. And electrodepositing gold nanoparticles onto the surface of electrodes using cyclic voltammetry (CV) has also been reported [20,21].…”

Ultrasensitive label-free electrochemiluminescence immunosensor based on N-(4-aminobutyl)-N-ethylisoluminol-functionalized graphene composite

“…A comparison of the proposed method with other labelfree immunoassays for the determination of hIgG was made (Table 1) [1, [28][29][30][31][32][33]. The results show that the limit of detection of the present method is superior to most previously reported methods for the determination of hIgG.…”

An electrochemical sensor for gallic acid based on Fe2O3/electro-reduced graphene oxide composite: Estimation for the antioxidant capacity index of wines

“…However, since the perfectly conjugated electron structure in GO is destroyed by the oxidation process, the electron transport capacity of GO is poor. To remedy such a default, the GO in the composite was further transformed to the reduced graphene oxide (rGO) through an electrochemical method, which has been regarded as a most facile and popular strategy due to its advantages of low-cost, controllable, simple and environmental-friendly [29,30]. Electrochemical characterization assays showed that the electrochemically treated composite film had the higher electrochemical property than the single-component of fFe 2 O 3 or rGO.…”