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Variation of with the of the electrolyte for a hydrogen-terminated diamond device (curve a) and for an ozone-treated device (curve b). The potential of the electrolyte was fixed by a potentiostat at with respect to the source contact.
curves of an ozone-treated device as a function of the electrolyte pH.
pH sensitivity (mV/pH) of freshly hydrogenated devices (curve a and b) compared to ozone–treated diamond devices (curve c and d).
Microscopic view of a device cross section in which a H-terminated region is embedded between two O-terminated regions. Holes are only accumulated under the H-terminated diamond surface. Varying the modifies the adsorbed charge only at the oxidized regions, inducing a lateral modulation of the conductive channel.
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