Abstract
Diamond can adopt a p-type sheet conductivity by surface transfer doping. Fullerene and fluorinated fullerene derivatives have been shown in the past to take the role as efficient surface acceptors. In order to improve the thermal stability of the sheet conductivity so obtained, we have studied the covalent attachment of C 60F 48 to a hydrogen terminated and partially hydroxylated diamond (100) surface by photoelectron spectroscopy and in situ conductivity measurements. A careful control of the hydroxylation process turned out to be crucial in order to obtain a sufficient amount of OH groups on the surface and keep the concentration of ketone, ether, and carboxyl small.
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