Electrochemistry
5
Keysight 5500 SPM User’s Guide
5-4
wire will affect the voltage readings. Prepared electrodes may be
purchased from Keysight Technologies, or wires may be formed into
appropriate electrodes using the following approximate dimensions.
Working Electrode and Pogo Electrode
Contact between the working electrode (WE) on the sample plate and
the sample itself is typically accomplished using the L-shaped pogo
electrode included with the system (
). The pogo contacts the
sample through a separate access hole outside of the liquid cell chamber.
Since it is not in contact with the electrolyte it does not require special
cleaning. A wire made to the same dimensions can be used in place of
the pogo.
Figure 16-3
Pogo electrode
Reference Electrode
The reference electrode (RE) should have a diameter of 0.51 mm
(0.02 in). It will sit within the electrolyte but will not contact the
working electrode (sample).
Figure 16-4
Reference electrode
Counter Electrode
The counter electrode (CE) is typically made from platinum-iridium
wire (
). It should encompass as much of the inner rim of the
liquid cell as possible. It may be useful to make the diameter of the
