Stripping voltammetry at micro-interface arrays: A review

Herzog, Grégoire; Beni, Valerio

doi:10.1016/j.aca.2012.12.031

Cited by 83 publications

(54 citation statements)

References 141 publications

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“…However, this electrochemical method is seldom used for analytical applications due to its lack of sensitivity. Indeed, stripping voltammetry techniques at micro-electrode arrays are generally used for the detection of metals in solution [24]. The influence of the geometry of the microelectrode array (radius, spacing, number of electrodes) on the analytical response of Cu 2+ UPD-SV is discussed in order to optimise the microelectrode array design to achieve the best analytical performance.…”

Section: Introductionmentioning

confidence: 99%

On-chip electrochemical microsystems for measurements of copper and conductivity in artificial seawater

Herzog

Moujahid²,

Twomey³

et al. 2013

Talanta

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The fabrication and characterisation of microelectrochemical sensors for Cu(2+) and conductivity suitable for operation in the marine environment are presented. The impact of the designs on sensor performance and their adequacy to operate in real conditions are discussed. The sensors, tailored to voltammetric and impedimetric measurements, are fabricated on silicon using photolithographic and thin film deposition techniques. The impedimetric sensor is made of Pt interdigitated electrodes which are used for the measurement of conductivity. The voltammetric sensors are based on a three electrode electrochemical cell with on-chip Ag|AgCl reference and Pt counter and working electrodes, used for detection of copper by underpotential deposition-stripping voltammetry at microelectrode array. The sensors operated in the Cu(2+) concentrations ranging from 0.48 to 3.97 µM with a limit of detection of 0.115 μM. The impact of the temperature, the pH and the salinity of the artificial seawater on the sensitivity for Cu(2+) detection are also considered. Measurements of copper concentration and conductivity are validated using certified reference materials and standard solutions.

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Section: Introductionmentioning

confidence: 99%

On-chip electrochemical microsystems for measurements of copper and conductivity in artificial seawater

Herzog

Moujahid²,

Twomey³

et al. 2013

Talanta

Self Cite

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“…1 Electrochemical techniques are widely used in the determination of metal ions owing to the advantages of low cost, high sensitivity, and great convenience in operation, etc. 2 Recently, various bismuth-based electrodes have been extensively used for heavy metals detection through anodic stripping voltammetry (ASV) instead of mercury-based electrodes [3][4][5] owing to the low toxicity, wide potential window, and insensitivity to dissolved oxygen, ect. 6,7 Reduced graphene oxide (RGO) is a new carbon nanomaterial, which has been widely used for its unique structure and electronic properties.…”

mentioning

confidence: 99%

One-Step Electrochemical Deposition of Reduced Graphene Oxide-Bismuth Nanocomposites for Determination of Lead

Pan

Lin

et al. 2015

ECS Electrochemistry Letters

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The novel reduced graphene oxide-bismuth (RGO-Bi) nanocomposites were successfully synthesized through one-step electrochemical reduced deposition and used to modify disposable screen-printed electrode (SPE) for determination of Pb(II). By electrochemical deposition, a large number of Bi particles were distributed on RGO. Combined the unique structure and electronic properties of RGO with the ability of Bi to form alloys with other metals, the RGO-Bi/SPE has shown wide linear range and low detection limit for determination of Pb(II). Additionally, the RGO-Bi/SPE was successfully applied to the rapid determination of Pb (II) Heavy metal pollution is becoming more and more serious in the coastal zone environment.1 Electrochemical techniques are widely used in the determination of metal ions owing to the advantages of low cost, high sensitivity, and great convenience in operation, etc. Recently, various bismuth-based electrodes have been extensively used for heavy metals detection through anodic stripping voltammetry (ASV) instead of mercury-based electrodes 3-5 owing to the low toxicity, wide potential window, and insensitivity to dissolved oxygen, ect.6,7 Reduced graphene oxide (RGO) is a new carbon nanomaterial, which has been widely used for its unique structure and electronic properties.8-11 Many bismuth-based electrodes modified with nanomaterials, 8,[12][13][14][15][16][17] such as carbon nanotube, graphene, etc., have been reported for the determination of heavy metals.In this paper, we report a new method to fabricate a RGO-Bi nanocomposite modified SPE (RGO-Bi/SPE) by one-step electrochemical deposition. Pb(II) was used as a model to be detected at RGO-Bi/SPE because Pb(II) is one of the major pollutants in both terrestrial and aquatic ecosystems. 18,19 The linear response was in the concentration range of 0.05-20 μM with a detection limit of 6.8 nM in the optimized situation. The repeatability of the RGO-Bi/SPE was also excellent with the RSD of 4.6%. ExperimentalMaterials and instruments.-All chemicals and reagents were of analytical grade. The morphologies of modified electrodes were characterized by scanning electron microscopy (SEM Hitachi S-4800). Inductively coupled plasma-mass spectrometry (ICP-MS, ELAN DRC) was used for comparative testing. Electrochemical Work Station (CHI 660D) was used throughout all electrochemical experiments. SPE which includes a screen-printed carbon working electrode (3 mm in diameter), carbon auxiliary electrode and a silver chloride reference electrode were purchased from Taiwan Chanpu Science and Technology Company.Preparation of the RGO-Bi/SPE electrode.-Prior to use, SPE was rinsed and ultrasonicated with deionized water and then subjected to potential cycling (−0.6∼0.6 V, 10 mV/s) in 0.5 M H 2 SO 4 . Bi(III) solution (120 mg/L) was mixed with the prepared GO (1.0 mg/mL) dispersion in volume ratio of 1:2 and ultrasonicated for 1 min. Subsequently, 5 μL mixed GO-Bi(III) suspensions were dropped on the surface of SPE and dried using an infrared lamp. Then the modifie...

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“…It includes two main steps: (i) an accumulation step, whose role is to concentrate analytes at the sensor surface; and (ii) a detection step during which the reverse reaction of the first step occurs. Thanks to the preconcentration step, stripping voltammetry shows higher sensitivity than direct methods, such as cyclic voltammery, linear sweep voltammetry, or chronoamperometry [46][47][48][49]. Stripping voltammetry can be used to detect nanoparticles/nanomaterials which are often used to enhance the sensitivity of aptasensing.…”

Section: Electrochemical Stripping Voltammetrymentioning

confidence: 99%

Aptasensors Based on Stripping Voltammetry

et al. 2016

Chemosensors

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Aptasensors based on stripping voltammetry exhibit several advantages, such as high sensitivity and multi-target detection from stripping voltammetric technology, and high selectivity from the specific binding of apamers with targets. This review comprehensively discusses the recent accomplishments in signal amplification strategies based on nanomaterials, such as metal nanoparticles, semiconductor nanoparticles, and nanocomposite materials, which are detected by stripping voltammetry after suitable dissolution. Focus will be put in discussing multiple amplification strategies that are widely applied in aptasensors for small biomolecules, proteins, disease markers, and cancer cells.

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Stripping voltammetry at micro-interface arrays: A review

Cited by 83 publications

References 141 publications

On-chip electrochemical microsystems for measurements of copper and conductivity in artificial seawater

On-chip electrochemical microsystems for measurements of copper and conductivity in artificial seawater

One-Step Electrochemical Deposition of Reduced Graphene Oxide-Bismuth Nanocomposites for Determination of Lead

Aptasensors Based on Stripping Voltammetry

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