Carbon Screen Printed Electrodes

ONLINE INQUIRY

Catalog Number

ACMA00018769

Chemical Name

Sensors made of carbon screen-printed electrodes for antigen detection

The schematic representation of processes to fabricate vegetable parchment SPEs immunosensor. ( Yan, Mei, et al. Biosensors and Bioelectronics 38.1 (2012): 355-361.

A sensor combining carbon screen-printed electrodes with high-quality materials was developed. The screen-printing process is simple and efficient. The good performance of the carbon screen-printed electrodes was characterized by cyclic voltammograms. Its good electrochemical behavior makes it have good electrochemical immunoassay performance in detection. Through a sandwich-type immunoreaction, HRP-Ab/Au NPs are captured on the immunosensor surface and catalyze the electroreduction process of H2O2, resulting in a stronger electrochemical signal. The conductivity is enhanced by graphene, and HRP-Ab/Au NPs not only provide a high content of HRP to the immunosensor surface for signal amplification, but also accelerate the electroreduction process of H2O due to the catalytic effect of Au NPs. The proposed electrochemical method also avoids the need for deoxygenation and exhibits a wide linear range. The immunosensor has acceptable specificity, stability, reproducibility, and accuracy. In addition, it is environmentally friendly and has high material efficiency, which is essential for flexible applications.
To characterize the electrochemical behavior of the carbon screen-printed electrode, potassium ferrocyanide was used as a model redox-active compound. In both bulk solution and soaked paper, the peak current is linearly proportional to the square root of the scan rate. The corresponding linear regression equations are Ipa (m = 2.2675 (R = 0.9996) and Ipc (m = 0.9994). The peak shape of the CV shows typical values. Reversible electrochemical reaction, where the reaction rate is controlled by the diffusion of the electroactive species to the planar electrode surface. The potential difference between the reduction peak (Epc) and the oxidation peak (Epa). For all scan rates between 10 and 120 mV s, the curve is 0.065 V and the peak current ratio (ipa/ipc) is equal to 1.0. This reversible behavior indicates that no side reactions occur.

Modified Carbon Screen-Printed Electrodes for Voltammetric Detection of Zn(II), Cd(II) and Pb(II)

Energy dispersion X ray (EDX) pattern of the Bi nanoparticles modified screen-printed working electrode surface. Rico, Mª Ángeles Granado, Mara Olivares-Marín, and Eduardo Pinilla Gil. Talanta 80.2 (2009): 631-635.

Chemically synthesized nanoparticles of metallic bismuth can be used to modify screen-printed carbon electrodes for voltammetric stripping detection of Zn(II), Cd(II) and Pb(II) in liquid samples. Microliter amounts of Bi aqueous dispersions were placed on the working electrode and the solvent was then evaporated to dryness, resulting in stable adsorption of Bi nanoparticles without the need for complex instrumentation. The procedure allows for easy and rapid modification of multiple electrodes prior to analysis without the need for pre-plating of Bi or addition of Bi(III) to the sample solution. Optimization of chemical and instrumental variables, including accumulation using disposable three-electrode screen-printed electrochemical strips in both convection and flow configurations, gave low ng mL-1 limits of detection with good recoveries and reproducibility. The performance of the proposed method was tested using certified reference samples (wastewater) and tap water, with overall acceptable results, but interferences when high Cu(II) concentrations were present, indicating the potential applicability of dispersed electrochemical sensing for heavy metals in water samples.
Electrode modification with Bi nanoparticles The electrode modification was performed by dispersing 2.5 mg of synthesized Bi nanopowder in 50 mL of ultrapure water and irradiating with ultrasound for 1 h. 10 L of the dispersion was placed on the carbon working electrode of the screen-printed strip. After the solvent evaporated at room temperature, the electrode was stored for future use.

Modification of carbon screen printed electrodes with polyaniline nanoparticles

XRD patterns for PANI nanoparticles prepared by electrochemical method, mole ratio between aniline and ethanol. Etorki, A. M., et al. J. Environ. Anal. Toxicol 7 (2017): 2161.

The development of an electrochemical nanosensor for the detection of mercury ions in aqueous solutions based on the film formation of polyaniline nanoparticles is described. Screen-printed carbon electrodes were modified with polyaniline nanoparticles. Electropolymerization of polyaniline nanoparticles was carried out using a pulsed potentiostatic method. The polyaniline nanoparticle samples were prepared by repeating the potential step process three times. The structure and morphology of the polyaniline nanoparticle-modified screen-printed carbon electrodes were characterized using Fourier transmission infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The PANI nanoparticles were spherical in shape with an apparent diameter of 20 to 45 nm. Square wave anodic stripping voltammetry was used to detect Hg(ll) on the PANI NPS-modified screen-printed carbon electrode under optimized conditions.
After cycling, the electrode was rinsed with anhydrous ethanol and dried under argon to prepare a clean surface. In order to form the modified electrode. Preparation of polyaniline nanoparticle modified screen-printed carbon electrode Aniline monomer was distilled under reduced pressure, and 1 M hydrochloric acid and aniline were dissolved in anhydrous ethanol at different molar ratios. The surface of the screen-printed carbon electrode was polished using alumina slurry on a soft cloth, first ultrasonically treated in ethanol and then in double distilled water for 5 minutes to remove possible contaminants. The electropolymerization of polyaniline nanoparticles was carried out using a pulsed constant potential method.

Carbon screen printed electrodes to prepare electrochemical sensors

Schematic of the hemoglobin microbubble formation Ganguly, Antra, et al. Scientific Reports 13.1 (2023): 14942.

A novel electrochemical biosensor for labeling hemoglobin microbubbles was developed. Label-free detection of hydrogen peroxide (H202) for oxidative stress and cancer diagnostic applications. The novelty of the constructed sensor lies in the use of sonochemically prepared hemoglobin microbubble capture probes, which allows for an extended dynamic range, lower detection limits, and enhanced resolution compared to native hemoglobin-based H202 biosensors. The size of the prepared hemoglobin microbubble particles was characterized using Coulter counter analysis and found to be 4.4 microns, and the morphology of these spherical microbubbles was displayed using bright-field microscopy.
The electrochemical sensor was prepared using screen-printed carbon electrodes with carbon as the working electrode, counter electrode and silver as the reference electrode. Pyrenebutyric acid N.H.S. ester (P.A.N.H.S.) crosslinker was prepared by weighing 1 mg of P.A.N.H.S. and adding 250 µl of dimethyl sulfoxide, dropping 5 µl of the solution on the working electrode, incubating the crosslinker-modified surface in a Faraday cage for 90 minutes under a constant nitrogen supply, washing the surface three times to remove any unbound P.A.N.H.S. linkers, and then adding 5ul of the prepared microbubble solution on the working electrode and incubating for another 90 minutes. The sonochemically prepared hemoglobin microbubbles were in the ferric state and the hemoglobin microbubble solution was reduced to the ferrous state using a reducing agent solution of 13.5 mM sodium dithionite.

※ Please kindly note that our products and services are for research use only.

Products

Carbon Screen Printed Electrodes

Sensors made of carbon screen-printed electrodes for antigen detection

Modified Carbon Screen-Printed Electrodes for Voltammetric Detection of Zn(II), Cd(II) and Pb(II)

Modification of carbon screen printed electrodes with polyaniline nanoparticles

Carbon screen printed electrodes to prepare electrochemical sensors

Related Products

Gold Screen Printed Electrodes