In this thesis, solution gate field effect transistors (SGFETs) based on surface conductive, hydrogen-terminated diamond are investigated. In-liquid electrolyte-gated Hall effect experiments were used to study the electronic transport of carriers in the p-type channel. Different scattering mechanisms were found to limit the Hall mobility, depending on the level of nitrogen impurities and the surface orientation. The gate-dependent accumulation of holes at the diamond/electrolyte interface was studied. Corresponding simulations reveal that the hydrophobicity of the diamond surface, influencing the structure of interfacial water, is decisive to understand this charge accumulation. Finally, the application of SGFETs in several fields was discussed, including the demonstration of SGFETs based on graphene. The thesis concludes with the presentation of the use of diamond SGFETs for the detection of cell signals, setting the basis for future diamond-based bioelectronic devices.
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In this thesis, solution gate field effect transistors (SGFETs) based on surface conductive, hydrogen-terminated diamond are investigated. In-liquid electrolyte-gated Hall effect experiments were used to study the electronic transport of carriers in the p-type channel. Different scattering mechanisms were found to limit the Hall mobility, depending on the level of nitrogen impurities and the surface orientation. The gate-dependent accumulation of holes at the diamond/electrolyte interface was st...
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