Electrochemical characterization of different screen-printed gold electrodes

García-González, Raquel; Fernández‐Abedul, M. Teresa; Pernía, Alberto M.; Costa-Garcı́a, Agustı́n

doi:10.1016/j.electacta.2007.07.059

Cited by 60 publications

(35 citation statements)

References 33 publications

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“…[4] Carbon-based SPEs usually perform well in aqueous solvents and show similar electrode kinetics to those observed on conventional disk-electrodes. [4,5,6] Gold [7,8] and platinum [9,10] SPEs have also been used, but much more rarely. Moving away from experiments in aqueous-based solvents, we recently found that the background currents of DropSens carbon SPEs are very large compared to Pt and Au SPEs when room temperature ionic liquid (RTIL) solvents are employed.…”

Section: Introductionmentioning

confidence: 99%

Oxygen reduction voltammetry on platinum macrodisk and screen-printed electrodes in ionic liquids: Reaction of the electrogenerated superoxide species with compounds used in the paste of Pt screen-printed electrodes?

Lee

Murugappan

Arrigan

et al. 2013

Electrochimica Acta

103

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Screen-printed electrodes (SPEs) are widely investigated as simple, three-electrode planar surfaces for electrochemical sensing applications, and may be ideal for gas sensing purposes when combined with non-volatile room temperature ionic liquids (RTILs). In this report the suitability of SPEs with RTIL solvents has been investigated for oxygen detection. Oxygen reduction has been studied on commercially available platinum SPEs in eight RTILs. Cyclic voltammetric wave shapes were found to be significantly different on Pt SPE surfaces compared to conventional solid Pt macroelectrodes, suggesting a possible reaction of the electrogenerated superoxide with the compounds that make up the ink/paste of the SPE surface. The only RTIL that did not show such drastically different voltammetry was one that contained a pyrrolidinium cation, suggesting a more chemically stable solvent environment compared to the other imidazolium and phosphonium cations studied. The analytical utility was then studied on four SPE surfaces (carbon, gold, platinum and silver) in two RTILs (one with a pyrrolidinium and one with an imidazolium cation) and linear responses were observed between current and % concentration in the range 10-100 % O 2 . This suggests that SPEs may indeed be suitable for oxygen sensing in some RTILs, but significantly more pre-treatment of the surface is required to obtain reliable results. However, the reaction of superoxide with the SPE ink, together with a noticeable deterioration of the signal over time, suggests that this type of sensing platform may only be suitable for "single-use" oxygen sensing applications.

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Section: Introductionmentioning

confidence: 99%

Oxygen reduction voltammetry on platinum macrodisk and screen-printed electrodes in ionic liquids: Reaction of the electrogenerated superoxide species with compounds used in the paste of Pt screen-printed electrodes?

Lee

Murugappan

Arrigan

et al. 2013

Electrochimica Acta

103

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“…However, electrochemical behavior of commercially available, screen-printed Au films, can be strongly influenced by the chemicals used in the inks and treatments of the films, which are usually not disclosed. 12 In addition to these methods, wet-chemical procedures have also been extensively studied. They require no specialized equipment or vacuum and can be used to deposit Au films on non-conductive substrates.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Electrically Conductive Au Thin Films by Colloid Sedimentation

Petek

Bukovec

Škofic

2015

ACSi

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Dedicated to the memory of Prof. Dr. Jurij V. Bren~i~. AbstractA novel and facile wet-chemical method for the preparation of Au thin films is presented. The Au thin films were deposited on glass substrates by the gravitational sedimentation of Au colloids. The colloids were formed by chemical reduction in ethanol using HAuCl 4 and NaBH 4 with no added surfactants. Without stabilizing agents the colloids quickly aggregated, settled to the bottom and formed a thin film. The sedimentation of the colloids was monitored using UV-vis spectroscopy. Thin films with Au loads ranging between 0.25 and 4.0 g m -2 were prepared and characterized by means of UV-vis spectroscopy, electrical resistance measurements, optical microscopy, scanning electron microscopy, and cyclic voltammetry. The results showed that nanostructured Au films with a very high specific surface area were formed. The films were electrically conductive and partially transparent to visible light.

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“…However, recently Cho et al ) measured a ∆E p = 100 mV for 2.5 × 10 -3 mol L -1 Fe(CN) 6 3-/4-, 0.5 mol L -1 KCl at 50 mV s -1 . When CVs were recorded for different screen printed gold electrodes (SPE) in 1 × 10 -3 mol L -1 Fe(CN) 6 3-ion + 0.1 mol L -1 H 2 SO 4 aqueous solution at 100 mV/ s ∆E p = 62 to 76 mV and at 2000 mV s -1 ∆E p = 78 to 231 mV were obtained, suggesting some influence of SPEs, mainly at higher potential scan rates (García-González et al, 2008). It is important to note that the conductivity of the sulfuric acid solution is higher than phosphate buffer and 0.1 mol L -1 KCl or NaClO 4 resulting in a lower ∆E p value.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

“…Thus, screen-printed gold electrodes were used as produced" (Carpini et al, 2004); Xu et al also used as received SPE gold-based electrode for HRP immobilization (Xu et al, 2003). Recently, García-González et al characterized different SPE-gold electrodes used for sensors preparation and the electrodes were used without pretreatment (García-González et al, 2008). Escamilla-Gomez et al used gold screen-printed electrodes (AuSPEs) pretreated with acid solution (H 2 SO 4 ) for impedimetric immunobiosensors.…”

Section: Preparation and Handling Of Electrodesmentioning

confidence: 99%