Gold Screen Printed Electrodes

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Catalog Number

ACMA00018771

Chemical Name

Electroanalytical Sensing of Ions Using Gold Screen Printed Electrodes

Typical cyclic voltammetric curves resulting from additions of Cr(III) over the range of 100 to 1600 mM into 0.1 M KOH using the gold screen printed electrodes. Metters, Jonathan P., Rashid O. Kadara, and Craig E. Banks. 、Analyst 137.4 (2012): 896-902.

Novel, disposable, single-shot gold screen printed electrodes were applied and their analytical performance for chromium (III) and (VI) sensing was evaluated. Furthermore, the gold screen printed electrodes showed competitive detection limits of 38.8 mM and 4.4 mM for chromium (III) and (VI), respectively, compared to current literature reports. The electrode response to chromium addition was found to be independent of common environmental interferences such as nickel and copper. It is important to note that the gold screen printed electrodes have a potential disposable nature due to their fabrication process and the presence of oxidized gold on the surface, reducing the need for potential cycling in case of their use as electrocatalysts for target analytes as is the case with polycrystalline gold electrodes.
The gold screen printed electrodes were first electrochemically characterized using the redox probe potassium ferrocyanide. First, scan rate studies were performed using gold screen printed electrodes in 1 mM potassium ferrocyanide and 0.1 M KCl, where the voltammetric peak height was observed to be linear with the square root of the scan rate used in the range of 10-600 mVs-1, indicating a diffusion process rather than a surface-controlled process. The electron transfer rate constant k for this process was determined using the Nicholson method, from which it was deduced to be 1.5×10 -4 cms-1.

Application of gold screen printed electrodes for seafood toxin detection

A schematic illustration of bio-functionalization process of S Koç, Yücel, et al. Electroanalysis 33.4 (2021): 1033-1048.

A new sensitive, low-cost, and stable label-free electrochemical biosensor was developed to detect DA at the electrode surface with a limit of detection (LOD) of 2.93 ng mL and 4.28 ng mL in phosphate buffered saline (PBS) and cell culture medium, respectively, by using commercially available gold screen printed electrodes (SPGE) without any modification. The lower sensitivity of the antibody-based biosensor in cell culture medium compared to PBS, a much simpler environment, may be due to the interaction of nonspecific compounds in the culture medium with DA. In addition to sensitivity and LOD, detailed parameters such as immobilization, EIS, surface properties, regeneration ability, electrode surface uniformity, and robustness were investigated.
To functionalize SPGE, a self-assembled monolayer (SAM) was formed by incubating with 10 mM 11-MUA for 1 h. The formation of SAM introduced carboxyl-containing thiols onto the surface. Subsequently, the surface was washed with ethanol and rinsed with PBS to remove unbound thiols. Streptavidin was then immobilized to 11-MUA via a carbodiimide reaction in the presence of NHS/EDC. The carbodiimide reaction was performed by incubating 50 mM EDC and NHS in 50 mM citrate buffer (pH approximately 4.5, 1:1 ratio) for 30 min. Another incubation method developed by Yu et al. [24] used 1.25 μg/mL streptavidin for 1 h. The biotinylated antibody was then diluted to 1.25 μg mL in PBS and conjugated to the streptavidin via incubation. After the 1 h incubation with streptavidin, a wash step was performed to remove unreacted culture medium by rinsing with wash buffer.

Sensors with gold screen printed electrodes for detection of trace amounts of lead

Scheme of a screen-printed gold sensor. Laschi, Serena, Ilaria Palchetti, and Marco Mascini. Sensors and Actuators B: Chemical 114.1 (2006): 460-465.

The novel gold screen printed sensor has applications in lead detection. The sensor consists of a screen-printed three-electrode cell: gold screen printed electrodes, a silver pseudo-reference electrode and a graphite counter electrode. It was used in combination with square wave anodic stripping voltammetry (SWASV). Sensor characterization experiments as well as optimization of the analytical procedure are reported. The optimized parameters allow detection of lead concentrations in the microgram/liter range in a short analysis time.
The gold screen printed sensors were pre-treated by cyclic voltammetry (CV) before first use. This step is necessary to obtain a stable baseline. HCl 0.1 M was used as supporting electrolyte. All measurements were performed without removing oxygen from the solution. The sensor was immersed in 5.0 ml of solution for the measurements; stirring conditions (1500 rpm) were used during the conditioning and accumulation steps, while the square wave scans were performed in static solutions. Spiked river water samples were analyzed as follows: 0.5 ml of sample was added to 4.45 ml of deionized water. To this solution, 50 μl HCl 10 M was added. Unspiked samples were acidified with concentrated HCl only to obtain a final concentration of 0.1 M HCl. The same samples were also analyzed using a classical mercury film electrode

Prussian Blue (PB) Modified Gold Screen-Printed Electrodes for Selective Hydrogen Peroxide Detection

Cyclic voltammograms of PB modified screen-printed electrodes in R1 De Mattos, Ivanildo Luiz, Lo Gorton, and Tautgirdas Ruzgas. Biosensors and Bioelectronics 18.2-3 (2003): 193-200.

Gold (Au) and platinum (Pt) screen-printed electrodes were modified with Prussian Blue (PB) for the development of amperometric sensors selective for hydrogen peroxide detection. The sensor showed a sensitivity of 2 A M cm for H2O2 for Au electrode and 1 A Mcm for H2O2 for Pt electrode. The sensor can also be used as a basis for the construction of glucose biosensors by further modification with crystalline glucose oxidase immobilized on Nafion membrane. To improve the operational stability of the modified electrodes, a buffer solution containing tetrabutylammonium toluene-4-sulfonate was used. The long-term performance of the sensor and biosensor was evaluated by continuously monitoring hydrogen peroxide and glucose solutions (50 mM and 1 mM, respectively) for 10 h in flow injection mode.
The Au and Pt screen-printed electrodes were mechanically polished with alumina powder until a mirror finish was obtained and then rinsed extensively with ultrapure water. Electrodeposition of PB films was done galvanostatically: screen-printed electrodes (Au or Pt) were inserted into a solution consisting of 2.5 mM FeCl, 2.5 mM KFe(CN) 0.1 M KCl, 0.1 M HCl and a constant current of 4 mA (cathodic) was applied for 100, 160 or 240 s. The electrodes were then carefully rinsed with water and transferred to a solution consisting of 0.1 M KCl 0.1 M HCl (R) where the electrodes were electrochemically cycled between 350 and 50 mV vs. SCE for 25 times. The potential scan rate in the cyclic voltammetry experiments was 50 mV s. After washing with water and drying at ambient temperature for 1 h, the modified electrodes were then immersed in Rand conditioned by holding at 50 mV for 600 s and cycling between 350 and 50 mV vs. SCE (25 cycles). The effect of TTS on the stability of the PB modified electrodes was investigated by adding different amounts of TTS to R.

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Products

Gold Screen Printed Electrodes

Electroanalytical Sensing of Ions Using Gold Screen Printed Electrodes

Application of gold screen printed electrodes for seafood toxin detection

Sensors with gold screen printed electrodes for detection of trace amounts of lead

Prussian Blue (PB) Modified Gold Screen-Printed Electrodes for Selective Hydrogen Peroxide Detection

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