Evolution of the surface potential

The information recorded by the snrface potential measurement (Chapter 6) natnially stems from the presence of charges located at the surface of the device. The previous model has allowed us to clarify their nature, their location and their concentration. The total charge Qrotai, which is propoitional to the surface potential, can be expressed by an eqnation of the following type [Pg.399]

To simplify, we can consider that 0m is negligible compared to 0i and 02. This hypothesis is justified by the fact this species, as noted before, is not detected by surface potential measurements condncted on the metal alone. [Pg.399]

For the other two species, we have admitted that the charge stemming from the [Pg.399]

If we note that the surface potential is proportional to QiGtai, and if we remember that 02 = KsGi, it is possible to recalculate to the nearest factor this potential for different temperatures and different pressures. [Pg.399]

It is interesting to note that the simulation results obtained with gold are especially representative of the experimental results, both for the influence of the temperature as well as the influence of the pressure. With regards to the results [Pg.399]

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