Preparation of Microarray Electrodes by Sonochemical Ablation of Polymer Films

Madigan, Nanette A.; Hagan, Carolynne R. S.; Coury, Louis A.

doi:10.1149/1.2054824

Cited by 22 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that mercury thin films formed onto glassy carbon electrodes without an additional polymer coating were not suitable for sonovoltammetric studies in the present cell configuration. This is not surprising because mercury shows only weak interactions with the glassy carbon surface 21 and the capability of high-intensity ultrasound to erode electrode material 11,22 is well-known. Consequently, further studies were directed to polymer-coated mercury films.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound-Enhanced Anodic Stripping Voltammetry Using Perfluorosulfonated Ionomer-Coated Mercury Thin-Film Electrodes

Matysik

Brett

et al. 1997

Anal. Chem.

View full text Add to dashboard Cite

The high mass transport caused by ultrasonic radiation in the preconcentration of trace metal species in anodic stripping voltammetry (ASV), leads to an order of magnitude enhancement in sensitivity. A Nafion-coated mercury thin-film working electrode is placed in a specially designed small-volume sonovoltammetric cell. The preparation and curing procedure for the Nafion film on a glassy carbon electrode substrate as well as ultrasound-enhanced mercury deposition through the Nafion film are optimized. The resulting electrode assembly is stable under ultrasonic irradiation. Optical microscopy observations show the formation of closely spaced mercury droplets of micrometer dimensions under the Nafion film. The performance characteristics of ultrasound-enhanced ASV at the Nafion-coated mercury thin-film electrode are studied in detail. The detection limit obtained for lead and cadmium test species is 3 × 10 -11 M (30 s preconcentration in the presence of ultrasound). A relative standard deviation of 1.2% is obtained for repetitive determinations of 10 nM Cd 2+ (n ) 9).Anodic stripping voltammetry (ASV) is well established as a powerful method for trace metal analysis. 1 Its inherent sensitivity results from preconcentrating the metal of interest into or onto an electrode followed by an anodic stripping step, usually using a differential pulse or square wave voltammetric scan.Potentially, the detection limit can be lowered via more efficient preconcentration. In other words, the higher the rate of mass transport during the deposition period the lower the attainable limit of detection. However, other prerequisites such as reproducibility of mass transport and stability of the electrode assembly under the preconcentration conditions have to be fulfilled. Several effective strategies have been described for preconcentrating the analyte in stripping voltammetric determinations. These include hydrodynamic systems such as the rotating disk electrode 2,3 and stationary electrodes in combination with flowing solutions, typically in wall-jet 4-6 configurations. Frequently, stirring is also used to impose convection in the electrolyte solution. In the case of microelectrodes, it has been demonstrated that sufficiently effective preconcentration can be achieved in quiescent solution on the basis of (hemi)spherical diffusion. 7,8 Sonovoltammetry, i.e., the performance of voltammetry in the presence of ultrasound, has recently been established as a powerful tool for studying electrochemical processes. 9-14 The attractive features of ultrasound-enhanced voltammetry are as follows: (i) Ultrasonic irradiation leads to very high mass transport of electroactive species and their products to and from the electrode surface. 10,14 (ii) Ultrasound can influence the mechanism of chemical and electrochemical reactions via the action of highly reactive radicals such as • OH and • H formed during sonolysis of water. 15,16 (iii) The adsorption of species involved in an electrochemical reaction can be reduced in the presence of ultrasound....

show abstract

Section: Resultsmentioning

confidence: 99%

Ultrasound-Enhanced Anodic Stripping Voltammetry Using Perfluorosulfonated Ionomer-Coated Mercury Thin-Film Electrodes

Matysik

Brett

et al. 1997

Anal. Chem.

View full text Add to dashboard Cite

show abstract

“…Among the mentioned mechanisms microjets are the most efficient in reduction of the diffusion layer and show the widest spectrum of use in electrochemistry. Apart from enhanced mass transfer of substrates and products to and from the electrode, they can also remove the absorbed material or even passivate the layer at the electrode [ 11 , 12 , 13 ]. This is enabled by the formation of very high pressure (several thousand bars) on the electrode surface at the moment of the jets of liquid reaching the surface [ 14 ].…”

Section: Mechanism Of Sonoelectrodeposition and Sonophotodepositiomentioning

confidence: 99%

In Situ Coupling of Ultrasound to Electro- and Photo-Deposition Methods for Materials Synthesis

Magdziarz

Colmenares

2017

Molecules

View full text Add to dashboard Cite

This short review provides the current state-of-the-art of in situ coupling of ultrasound to chemical deposition methods. Synergetic action of ultrasound and light radiation or electrical fields may result in new powerful methodologies, which include sonophotodeposition and sonoelectrodeposition processes. The effect of ultrasound is explained on the basis of different physical mechanisms emerging from cavitation phenomenon. Some possible mechanisms of the interactions between ultrasound and photochemical and electrochemical processes are discussed here. The application of sonophotodeposition and sonoelectrodeposition as green energy sources in the syntheses of different nanomaterials is also reviewed.

show abstract

“…They are able even to remove absorbed material and/or sweep away passivating layer from the electrode surface. This can result in electrode activation [32][33][34]. Unfortunately, it can result also to destruction of the surface [35].…”

Section: Comparison Of Different Mechanismsmentioning

confidence: 99%

Application of ultrasound in electrochemistry. An overview of mechanisms and design of experimental arrangement

Klíma

2011

Ultrasonics

View full text Add to dashboard Cite

Preparation of Microarray Electrodes by Sonochemical Ablation of Polymer Films

Cited by 22 publications

References 0 publications

Ultrasound-Enhanced Anodic Stripping Voltammetry Using Perfluorosulfonated Ionomer-Coated Mercury Thin-Film Electrodes

Ultrasound-Enhanced Anodic Stripping Voltammetry Using Perfluorosulfonated Ionomer-Coated Mercury Thin-Film Electrodes

In Situ Coupling of Ultrasound to Electro- and Photo-Deposition Methods for Materials Synthesis

Application of ultrasound in electrochemistry. An overview of mechanisms and design of experimental arrangement

Contact Info

Product

Resources

About