Tungsten is a versatile and widely-used microelectrode material that offers a good balance between performance and cost.
Advantages
- Extremely strong and stiff metal provides probes with exceptional rigidity.
- Great for acute and chronic recording due to biocompatibility and lower cost.
- High corrosion resistance offers consistent long-term performance.
Disadvantages
- Does not provide the same degree of electrochemical performance or stability as platinum-iridium alloy, making it a poor alternative for microstimulation.
- Lower charge transfer capacity of tungsten will result in larger, potentially unsafe interfacial potentials when applying the same stimulation current as to a platinum-iridium electrode.
- Certain pH or stimulation conditions can lead to tungsten corrosion.
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