scholarly journals Low-cost screen-printed electrodes based on electrochemically reduced graphene oxide-carbon black nanocomposites for dopamine, epinephrine and paracetamol detection

2018 ◽  
Vol 515 ◽  
pp. 101-108 ◽  
Author(s):  
G. Ibáñez-Redín ◽  
D. Wilson ◽  
D. Gonçalves ◽  
O.N. Oliveira
Keyword(s):  
Graphene Oxide ◽  
Carbon Black ◽  
Reduced Graphene Oxide ◽  
Low Cost ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Screen Printed

scholarly journals Electrochemically Reduced Graphene Oxide-Based Screen-Printed Electrodes for Total Tetracycline Determination by Adsorptive Transfer Stripping Differential Pulse Voltammetry

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 76 ◽  
Author(s):  
Anabela S. Lorenzetti ◽  
Tania Sierra ◽  
Claudia E. Domini ◽  
Adriana G. Lista ◽  
Agustin G. Crevillen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Differential Pulse Voltammetry ◽  
Reduced Graphene Oxide ◽  
Selective Adsorption ◽  
Differential Pulse ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Pulse Voltammetry ◽  
Screen Printed

Disposable electrochemically reduced graphene oxide-based (ERGO) screen-printed electrodes (SPE) were developed for the determination of total tetracyclines as a sample screening approach. To this end, a selective adsorption-detection approach relied on adsorptive transfer stripping differential pulse voltammetry (AdTDPV) was devised, where the high adsorption capacity and the electrochemical properties of ERGO were simultaneously exploited. The approach was very simple, fast (6 min.), highly selective by combining the adsorptive and the electrochemical features of tetracyclines, and it used just 10 μL of the sample. The electrochemical sensor applicability was demonstrated in the analysis of environmental and food samples. The not-fully explored AdTDPV analytical possibilities on disposable nanostructured transducers become a new tool in food and environmental fields; drawing new horizons for “in-situ” analysis.

Potentiometric Taste Sensing Using Reduced Graphene Oxide Screen Printed Electrodes

2020 ◽  
Vol 18 (12) ◽  
pp. 881-888
Author(s):  
Anil B. Patil ◽  
Umesh. J. Tupe ◽  
Vikas V. Deshmane ◽  
Arun V. Patil
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Principal Component ◽  
Experimental Results ◽  
Statistical Tool ◽  
Sensing Applications ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Pharmaceutical Industries ◽  
Screen Printed

This paper reports the development of simple and economical reduced graphene oxide (rGO) based screen-printed electrodes (SPE) for five basic taste sensing applications. Twenty different test solutions for the five tastes of salty, sour, sweet, umami, and bitter at 1 ppm, 10 ppm, 100 ppm, 1000 ppm concentration levels were tested with the fabricated SPEs. From experimental results, electrical signals generated between the electrode and test solution interface were measured using the potentiometric method. Satisfactory potentiometric responses of SPEs to different ppm concentrations for each sample were used to analyze the sample data. Histogram using the statistical tool was used to analyze the changes in the conductivity response. A multivariate Principal Component Analysis (PCA) statistical tool correlated using loading plots between variables and factors of all the five basic tastes. The plot showed the interrelation between variables and test samples. The obtained experimental results from these rGO based SPEs make them suitable for their use in taste sensing applications such as for any taste disorder disability, food-producing industry, pharmaceutical industries, etc.

scholarly journals Applications of Graphene-Based Materials in Sensors

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3196
Author(s):  
Miguel Hernaez
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensors ◽  
Graphene Quantum Dots ◽  
Special Issue ◽  
Mass Sensors ◽  
Screen Printed Electrodes ◽  
Reduced Graphene ◽  
Screen Printed

This Special Issue compiles a set of innovative developments on the use of graphene-based materials in the fabrication of sensors. In particular, these contributions report original studies on a wide variety of sensors, such as gas sensors for NO2 or NH3 detection, antibody biosensors or mass sensors. All these devices have one point in common: they have been built using graphene-based materials like graphene, graphene oxide, reduced graphene oxide, inkject printing graphene, graphene-based composite sponges, graphene screen-printed electrodes or graphene quantum dots.

scholarly journals Amperometric L-Lactate Biosensor Based upon a Gold Nanoparticles/Reduced Graphene Oxide/Polyallylamine Hydrochloride Modified Screen-Printed Graphite Electrode

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 74
Author(s):  
Oana-Maria Istrate ◽  
Lucian Rotariu ◽  
Camelia Bala
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Lactic Acid ◽  
Reduced Graphene Oxide ◽  
Long Term Stability ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Dehydrogenase Enzyme ◽  
Polyallylamine Hydrochloride ◽  
Screen Printed

This work describes a novel L-lactate biosensor based on the immobilization of L-lactate dehydrogenase enzyme on the screen-printed electrode modified with a ternary composite based on gold nanoparticles, electrochemically-reduced graphene oxide, and poly (allylamine hydrochloride). The enzyme was stabilized by crosslinking with glutaraldehyde. Applied working potential, pH and NAD+ concentration were optimized. The biosensor reports a specific sensitivity of 1.08 µA/mM·cm2 in a range up to 3 mM L-lactic acid with a detection limit of 1 µM. The operational and long-term stability as well as good selectivity allowed the L-lactic acid measurement in dairy products and wine samples.

Electrochemically Reduced Graphene Oxide Film Modified Electrode for Detection of Hydrogen Peroxide

2013 ◽  
Vol 538 ◽  
pp. 165-168 ◽  
Author(s):  
Juan Li ◽  
Juan Yang ◽  
Zhan Jun Yang ◽  
Ping Ji ◽  
Yi Mei Zhou ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Low Cost ◽  
Modified Glassy Carbon Electrode ◽  
Promising Alternative ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
H2o2 Sensing ◽  
Optimized Conditions

A novel electrochemical method was proposed for detection of hydrogen peroxide (H2O2) based on electrochemical reduction of graphene oxide (GO) modified glassy carbon electrode (GCE). The electrochemically reduced graphene oxide (RGO) was characterized using cyclic voltammetry (CV). Under the optimized conditions, the RGO modified GCE showed much wide linear range for H2O2 from 2.0 to 600 M with the detection limit of 0.67 M (S/N = 3). The proposed method is simple, low-cost and convenient and will be a promising alternative for H2O2 sensing.

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