Thomas RECORDING electrochemical multi-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 multi metal core fibers (4 or 7 independent metal cores) of platinum/tungsten alloy, insulated with quartz glass.

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

This kind of multi-core-microelectrodes may serve as quasi ring-disk-electrodes with the central core as disk and the surrounding six cores hot-wired as ring electrode

Product Description

Key Features

• Quartz glass insulted multi-metal disc electrode fiber 

• 4- or 7-independent electrode channels 

• Metal is platinum / tungsten-alloy (95%/5%)

• The metal core is always centred within the polished glass cross section 

• Insulation material is quartz glass in contrast to borosilicate glass which is often used. Quartz glass has a lower dielectric constant (app. 3,5…3,8) a higher volume resistivity and a much lower loss factor (quartz glass app. 0.0038, borosilicate glass app. 0.584). As known from patch pipettes, glasses with the lowest loss factor exhibit the lowest electrical noise in the recorded signals. It is a well known fact that quartz glass improves the signal to noise ratio of probes dramatically in contrast to other insulation materials (e.g. borosilicate glass).

• Customization of electrodes is possible. 

4-Disc Microelectrode (Tetrode)

Thomas 4-Disc Microelectrodes (Tetrodes) are available in variable design versions for use in different electrochemical applications (e.g. SECM). Our single-disc microelectrodes for electrochemical applications can be customized to our customer´s needs. So please do not hesitate to aks for your individual electrode design! 

Specifications:

Total length (L1) = 80mm

Length (L2)  =  10mm

Lenght (L3) = 5 mm

Lenght (L4) = 50 mm

Diameter (d1)=2,0mm

Diameter (d2)=1,0mm

Fiber material: Quartz glass insulted Platinum (95%)/Tungsten (5%) (MEF9514264C)

Tip shape: C 

Connector: gold plated sockets (see picture on the rigth side)

Article number: AN000309

Standard Connector:

7-Disc Microelectrode (Heptode)

Thomas 7-Disc Microelectrodes (Tetrodes) are available in variable design versions for use in different electrochemical applications (e.g. SECM). For example the use of ring-disk ultramicroelectrodes as tips as a means of extending the methodology of the scanning electrochemical microscope was described by Ufheil et al. 2002 [see 1]. Our single-disc microelectrodes for electrochemical applications can be customized to our customer´s needs. So please do not hesitate to aks for your individual electrode design! 

Specifications:

Total length (L1) = 80mm

Length (L2)  =  10mm

Lenght (L3) = 5 mm

Lenght (L4) = 50 mm

Diameter (d1)=2,0mm

Diameter (d2)=1,0mm

Fiber material: Quartz glass insulted Platinum (95%)/Tungsten (5%) (MEF100157C)

Tip shape: C 

Connector: gold plated sockets (see picture on the rigth side)

Article number: AN000262

Standard Connector:

[1] Ufheil, J., Borgwarth, K., Heinze, J., Analytical Chemistry, 2002, 74, 1316-1321

[2] Sklyar, O., Ufheil, J., Heinze, J., Wittstock, G., Electrochimica Acta, 2003, 49, 117-128

[3] Baltes, N., Heinze, J., ChemPhysChem, 2009, 10, 174-179

Selected Publications

Product Information

Electrochemical Electrodes

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