Electrochemical Single-core Microelectrodes

Thomas RECORDING electrochemical disc microelectrodes were originally designed for SECM (Scanning ElectroChemical Microscopy), but they are also suitable as working electrodes for other electrochemical applications like voltammetry or amperometry.

 

The electrodes are based on unique single metal core fibers of platinum or platinum/tungsten alloy, insulated with quartz glass.

Key features:

  • Material: quartz glass insulated platinum or platinum/tungsten
  • Unique manufacturing technique offers high reproducibility of tip geometry
  • Tip geometry: highly centered metal core
  • Signal quality: very good signal to noise ratio
  • Quartz glass offers better electrical characteristics as borosolicate glass
  • Tip shape: different tip shapes avaible with tip diameters in the µm range
Core conductor material: platinum (95%), tungsten (5%)
Insulation material: quartz glass
Number of available channels: 1-channel electrochemical electrode (4-channel or 7-channel available)
Tip shape: (B) pulled & ground, disc type (only available for 4 channel electrochemical electrode)
(C) only ground, disc type (most common)
Connectors: gold plated male pin, 0.8mm
Matching female connector available from Thomas RECORDING

Dimensions: 

L1: Standard is 80mm, custom adaption possible
L2: Standard is   5mm, custom adaption possible
L3: Standard is 40mm, custom adaption possible
d1: 2.0mm

See Figure 7 for the dimensions of the electochemical multicore electrode.

Custom electochemical electrodes are available on request.

Features

A special manufacturing process guarantees a highly centered metal core within the glass insulation and a high reproducibility of the RG ratio.

Every electrode produced by Thomas RECORDING is microscopically controlled and tested by cyclic voltammetry. The test results for each electrode are documented by test certificates enclosed to your shipment. The electrochemical active diameter is determined for every individual electrode by measuring the diffusion limiting current. For more information please be referred to the product information sheet below, or send us your request.

Figure 1: Compared to widely used borosilicate glass, quartz glass is a much better insulator with a lower loss factor (0,0038 for quartz glass, app. 0,58 for borosilicate glass). Quartz glass insulated electrodes have lower electrical background noise and therefore a better signal to noise ratio.

Figure 2: Demonstrates the performance of Thomas RECORDING electrochemical microelectrodes. 

Related Publications

[7] Etienne M., Moulin J-P., Gourhand S. Accurate control of the electrode shape for high resolution shearforce regulated SECM. Electrochimica Acta; 2013; Volume 110, pp 16-21; DOI: 10.1016./j.electacta.2013.03.096

[6] Etienne M., Dossot M., Grausem J., Herzog G. Combined Raman Microspectrometer and Shearforce Regulated SECM for Corrosion and Self-Healing Analysis. Analytical Chemistry; 2014; 86 (22), pp 11203-11210; DOI: 10..1021/ac502670t

[5] Etienne M., Lhenry S., Cornut R., Lefrou C. Optimization of the shearforce signal for scanning electrochemical microscopy and application for kinetic analysis. Electrochimica Acta; 2013; Volume 88: pp 877-884, DOI:10.1016/j.electacta.2012.09.063 

[4] Etienne M. Layoussifi B. Giornelli T. SECM-based automate equipped with a shearforce detection for the characterization of large and complex samples. Electrochemisty Communications, 2012, Volume 15, Issue 1, pp 70-73, DOI: 10.1016/j.elecom.2011.11.028

[3] van Megen M.J.J., Odijk M., Wiedemair J., Olthuis W., van den Berg A. Differential cyclic voltammetry for selective and amplified detection. Journal of Electroanalytical Chemistry, Volume 681 Page 6-10, 2012

[2] Etienne M, Layoussifi B, Giornelli Th, Jacquet D. SECM-based automate equipped with a shearforce detection for the characterization of large and complex samples. Electrochemical Communications; 2011;  15: 70-3;

[1] Cornut R, Bhasin A, Lhenry S, Ethienne M, Lefrou Ch. Accurate and Simplified Consideration of the Probe Geometrical Defaults in Scanning Electrochemical Microscopy: Theoretical and Experimental Investigations. Analytical Chemistry, 2011; 83: 9669-75.