Electrochemical co-deposition of reduced graphene oxide-gold nanocomposite on an ITO substrate and its application in the detection of dopamine

Jiang, Chaoyi; Zeng, Xiangzhou; Wu, Bi-Jun; Zeng, Qiao; Pang, Wenhui; Tang, Jing

doi:10.1007/s11426-016-0015-2

Cited by 12 publications

(5 citation statements)

References 34 publications

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“…The peak currents increase after deposition of rGO onto the ITO surface, which indicates the improvement of the electrochemical conductivity of the modified electrode in comparison with the bare ITO electrode ( Fig 3, curve b ). These results are in an agreement with the previously reported results by Jiang et al (2016) and Zhang et al, (2013) [19, 20], which reported that the modification of ITO electrode with GO results in enhancing the electrical conductivity of the bare ITO electrode.…”

Section: Resultssupporting

confidence: 94%

Fabrication of gold/graphene nanostructures modified ITO electrode as highly sensitive electrochemical detection of Aflatoxin B1

2019

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Aflatoxins (AFs) are a family of fungal toxins that produced in food and feed by two Aspergillus species (Aspergillus flavus and Aspergillus parasiticus). Several techniques have been reported for AFs detection including high-pressure liquid chromatography, enzyme-linked immunosorbent assay, surface plasmon resonance and recombinant immune blotting assay. But, these methods are disadvantaged because they consumed a long time for analysis; in addition, they required a piece of complicated and expensive equipment. Therefore, developing of inexpensive sensors with high selectivity and sensitivity for detecting of AFs levels without extensive sample preparation has received great attention. Several electrochemical AFs sensors have been reported; however, there is still a need for developing a new, simple and rapid electrochemical AFs sensor. Here, we have developed a new AFs sensor based on Au nanostructures/graphene nanosheets modified ITO substrate that could enhance the Raman effect and the electrochemical conductivity. The modified electrode was prepared based on layer-by-layer electrochemical deposition method. AFs antibody was immobilized onto the Au nanostructures/graphene nanosheets; then it was used as a probe for rapid, simple and cheap detection of AFs level using Raman spectroscopy and electrochemical techniques. Our results demonstrated that the developed system showed a simple, easy and sensitive sensor for monitoring low concentrations of AFB1 with a detection limit of about 6.9 pg/mL, also it allowed the determination of AFB1 in spiked food samples.

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Section: Resultssupporting

confidence: 94%

Fabrication of gold/graphene nanostructures modified ITO electrode as highly sensitive electrochemical detection of Aflatoxin B1

2019

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“…Potentiostatic electrodeposition with standard three electrode system was used for synthesis with indium tin oxide (ITO) coated glass plate as working electrode Jiang et al (2017); Rivera et al (2017). Platinum wire was used as the auxiliary electrode and Ag/AgCl (Saturated KCl) was used as the reference electrode.…”

Section: Synthesismentioning

confidence: 99%

CO2 gas sensing properties of Na3BiO4-Bi2O3 mixed oxide nanostructures

Gupta

Divakaran

Awasthi

et al. 2022

Environ Sci Pollut Res

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In this paper, we report Na3BiO4 -Bi2O3 mixed oxide nanoplates for carbon dioxide gas sensing applications. These nanoplates have been synthesized using electrochemical deposition with potentiostatic mode on ITO substrate and characterized using scanning electron microscopy (SEM) & X-ray diffraction (XRD) to analyze their surface morphology and structure. SEM study shows the presence of horizontally aligned nanoplates stacked on top of one another (thickness 40 nm to 75 nm). XRD pattern shows the presence of monoclinic Na3BiO4 and Bi2O3. The gas percentage response is evaluated by measuring the change in electrical resistance of the nanoplates in the presence of carbon dioxide for different pressures at 50 • C, 75 • C and 100 • C. Percentage response of more than 100 % is seen at 30 psi gas pressure which increases to ≈ 277 % at 90 psi at 100 • C.

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“…In the literature, a plethora of reports are available on fabrication of RGO-Au biosensors and they exhibit excellent biosensing activity. − Accurate, selective and susceptible detection of hydrogen peroxide (H 2 O 2 ) and ascorbic acid (AA) is of immense importance in clinical diagnosis, biopharmaceuticals and industrial fields. − Enzyme free amperometric sensing has evolved as an alternative choice for detection of H 2 O 2 and AA as it not only removes the demerits of enzyme-based sensors like complicated fabrication technique and low thermal/chemical stability but also because of its excellent sensitivity, good selectivity, very short response time and low cost of instrumentation . Diabetes can be easily diagnosed through detection of H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Reduced Graphene Oxide Wrapped Circular Au Nanoplatelets: Enhanced Photoluminescence, Excellent Surface-Enhanced Raman Scattering, Photocatalytic Water Splitting, and Non-Enzymatic Biosensor

Majumder

Satpati

Kumar

et al. 2018

ACS Appl. Nano Mater.

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Herein, we demonstrate the synthesis and multifunctional properties of reduced graphene oxide (RGO)-wrapped Au nanoplatelets. We have characterized the sample by field emission scanning electron microscope (FESEM), high-resolution transmission electron microscope (HRTEM), energy-dispersive X-ray spectroscopy (EDS), high-angle annular dark-field scanning transmission electron microscopy (STEM-HAADF), electron energy-loss spectroscopy (EELS), and X-ray photoelectron spectroscopy (XPS) studies. It has been shown that the RGO wraps a large number of 2D circular Au nanoplatelets (diameter ∼15 nm). We have examined the optical property of the sample using Raman, UV–vis, and PL spectroscopic techniques. Large enhancement in intensity of Raman spectra was observed due to the surface enhanced Raman scattering (SERS) resulting from the Au nanoplatelets. The collective sway of surface plasmon resonance and fluorescence resonance energy transfer effect owing to Au gives rise to giant enhancement in intensity of photoluminescence emission spectrum. Upon visible-light irradiation, photocurrent flows through the sample due to interband 6sp transition within the Au nanoplatelets and it exhibits photocatalytic water splitting effect. The sample displays excellent nonenzymatic hydrogen peroxides (H2O2) and ascorbic acid (AA) sensing property. The value of sensitivity for H2O2 is 280.28 μA mM–1 cm–2 in the linear range of 1 μM to 0.8 mM and that for AA is 314.07 μA mM–1 cm–2 in the linear range of 25–300 μM. The lowest detection limit of both H2O2 and AA is 6.8 μM at S/N= 3. So, the sample can be used for multifunctional applications in SERS as substrate, photocatalytic water splitting, photodetectors, and nonenzymatic biosensing.

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Electrochemical co-deposition of reduced graphene oxide-gold nanocomposite on an ITO substrate and its application in the detection of dopamine

Cited by 12 publications

References 34 publications

Fabrication of gold/graphene nanostructures modified ITO electrode as highly sensitive electrochemical detection of Aflatoxin B1

Fabrication of gold/graphene nanostructures modified ITO electrode as highly sensitive electrochemical detection of Aflatoxin B1

CO2 gas sensing properties of Na3BiO4-Bi2O3 mixed oxide nanostructures

Multifunctional Reduced Graphene Oxide Wrapped Circular Au Nanoplatelets: Enhanced Photoluminescence, Excellent Surface-Enhanced Raman Scattering, Photocatalytic Water Splitting, and Non-Enzymatic Biosensor

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