Highly sensitive voltammetric immunosensor for the detection of prostate specific antigen based on silver nanoprobe assisted graphene oxide modified screen printed carbon electrode

Thunkhamrak, Chidkamon; Chuntib, Prakit; Ounnunkad, Kontad; Banet, Philippe; Aubert, Pierre-Henri; Saianand, Gopalan; Gopalan, A.; Jakmunee, Jaroon

doi:10.1016/j.talanta.2019.120389

Cited by 66 publications

(35 citation statements)

References 41 publications

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“…Another available and widely used technique for glucose detection is the amperometry. Amperometry offers several advantages, such as ease of use, short analysis time, low detection limit, and lower cost when compared to other sensors [19][20][21]. The traditional amperometric glucose sensor uses an enzyme-glucose oxidase (GOx)-to catalyze the oxidation of glucose and realize high performance (high selectivity/sensitivity).…”

Section: Introductionmentioning

confidence: 99%

Non-Enzymatic Amperometric Glucose Sensor Based on Carbon Nanodots and Copper Oxide Nanocomposites Electrode

Sridara

Upan

Saianand

et al. 2020

Sensors

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In this research work, a non-enzymatic amperometric sensor for the determination of glucose was designed based on carbon nanodots (C-dots) and copper oxide (CuO) nanocomposites (CuO-C-dots). The CuO-C-dots nanocomposites were modified on the surface of a screen-printed carbon electrode (SPCE) to increase the sensitivity and selectivity of the glucose sensor. The as-synthesized materials were further analyzed for physico-chemical properties through characterization tools such as transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FTIR); and their electrochemical performance was also studied. The SPCE modified with CuO-C-dots possess desirable electrocatalytic properties for glucose oxidation in alkaline solutions. Moreover, the proposed sensing platform exhibited a linear range of 0.5 to 2 and 2 to 5 mM for glucose detection with high sensitivity (110 and 63.3 µA mM−1cm−2), and good selectivity and stability; and could potentially serve as an effective alternative method of glucose detection.

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Section: Introductionmentioning

confidence: 99%

Non-Enzymatic Amperometric Glucose Sensor Based on Carbon Nanodots and Copper Oxide Nanocomposites Electrode

Sridara

Upan

Saianand

et al. 2020

Sensors

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“…Since electrochemical impedance spectroscopy is a wellestablished technique for characterization of the processes occurring at the electrode-solution interface, and the obtained spectra are related to the changes at the electrode-solution interface, it was therefore used to characterize surface modications. 41 Fig. 1 illustrates the performance of the modied SPCE assessed by CV and EIS by exposing the electrode to a solution containing 0.1 mol L À1 KCl, 0.01 mol L À1 PBS (pH 7.4) and 0.005 mol L À1 Fe(CN 6 )] 3À/4À .…”

Section: Electrochemical Behaviormentioning

confidence: 99%

Simple, fast and environmentally friendly method to determine ciprofloxacin in wastewater samples based on an impedimetric immunosensor

et al. 2020

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In this study an impedimetric immunosensor was developed in order to determine ciprofloxacin (CIP) in wastewater samples, an emergent contaminant widely found in wastewater. To achieve this, an anticiprofloxacin antibody was immobilized on the surface of a printed carbon electrode. Then, the developed immunosensor was applied in wastewater samples from Université Laval residences (Québec, Canada) through the load transfer resistance (R ct ) using [Fe(CN) 6 ] 3À/4À as a redox probe, and the average CIP concentration was found to be 2.90 Â 10 À4 mg mL À1 . The observed R ct changes presented a linear relationship from CIP concentrations of 10 À5 to 1.0 mg mL À1 , with detection and quantification limits of 2.50 Â 10 À6 and 7.90 Â 10 À6 mg mL À1 , respectively. The immunosensor presented high selectivity and repeatability, as well as a good recovery rate in wastewater samples (97%). Significant interference with other compounds was not observed. The proposed method requires only 30 mL of sample without the use of organic solvents or preceding sample preparation and/or extraction techniques. Moreover, the method is fast: only 20 min of incubation followed by 2 min of analysis time was sufficient to obtain the CIP concentration. The method's estimated cost is U$ 2.00 per sample.

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“…Non-metal (carbon, nitrogen, sulphur) doping has been extensively studied, especially after the work by Asahi et al [34] on nitrogen-doped TiO 2 [34,35]. The composites or hybrids of TiO 2 with either graphene oxide [36], reduced graphene oxide, exfoliated graphene (G) sheets or G sheets having oxygenous functional groups (such as carboxylic (-COOH), hydroxyl (-OH) and carbonyl (C=O) groups) on the surface were effectively used to enhance the photocatalytic ability of TiO 2 [24,[37][38][39][40][41]. Through various studies, its understood that G inclusion into TiO 2 improves the photocatalytic efficiency of TiO 2 owing to its large specific surface area that can facilitate the distribution of TiO 2 and enable narrowing of the band gaps of TiO 2 [24][25][26][27][28]41,42].…”

Section: Introductionmentioning

confidence: 99%

Manganese and Graphene Included Titanium Dioxide Composite Nanowires: Fabrication, Characterization and Enhanced Photocatalytic Activities

et al. 2020

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We report the detailed microstructural, morphological, optical and photocatalytic studies of graphene (G) and manganese (Mn) co-doped titanium dioxide nanowires (TiO 2 (G-Mn) NWs) prepared through facile combined electrospinning-hydrothermal processes. The as-prepared samples were thoroughly characterized using X-ray diffraction (XRD), transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and diffuse reflectance spectroscopy (DRS). XRD studies reveal the formation of mixed anatase-rutile phases or rutile phase depending on the dopant (Mn) precursor concentrations in the electrospinning dope and calcination temperature. The evaluation of lattice parameters revealed that the incorporation of Mn species and carbon atoms in to the lattice of anatase or rutile TiO 2 could occur through substituting the sites of oxygen atoms. XPS results confirm the existence of Mn 2+ /Mn 3+ within the TiO 2 NW. Raman spectroscopy provides the evidence for structural modification because of the graphene inclusion in TiO 2 NW. The optical band gap of G-Mn including TiO 2 is much lower than pristine TiO 2 as confirmed through UV-vis DRS. The photocatalytic activities were evaluated by nitric oxide (NOx) degradation tests under visible light irradiation. Superior catalytic activity was witnessed for rutile G-Mn-co-doped TiO 2 NW over their anatase counterparts. The enhanced photocatalytic property was discussed based on the synergistic effects of doped G and Mn atoms and explained by plausible mechanisms.

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Highly sensitive voltammetric immunosensor for the detection of prostate specific antigen based on silver nanoprobe assisted graphene oxide modified screen printed carbon electrode

Cited by 66 publications

References 41 publications

Non-Enzymatic Amperometric Glucose Sensor Based on Carbon Nanodots and Copper Oxide Nanocomposites Electrode

Non-Enzymatic Amperometric Glucose Sensor Based on Carbon Nanodots and Copper Oxide Nanocomposites Electrode

Simple, fast and environmentally friendly method to determine ciprofloxacin in wastewater samples based on an impedimetric immunosensor

Manganese and Graphene Included Titanium Dioxide Composite Nanowires: Fabrication, Characterization and Enhanced Photocatalytic Activities

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