Photochemical oxidation of hydrogenated boron-doped diamond surfaces

Steam activation of boron doped diamond electrodes

“…As the steam-activation temperature is raised, the contact angle decreased and BDD steam-activated at 700°C showed a hydrophilic character with a contact angle of 17°. The conversion from hydrophobic to hydrophilic surfaces has been reported to occur after anodic treatment or photochemical oxidation of BDD, and has been suggested to be linked to the conversion of hydrogen terminated surfaces to oxygenated surfaces [16,17]. The decrease in water contact angle of the steam-activated BDD up to 700°C is thus attributed to enrichment in oxygen-terminated and/or oxygen surface functional groups, such as C=O, C-O-C, and C-OH.…”

The Use of Conducting Diamond in Electrochemistry

“…Contact angles of ∼90 ∘ have been measured using water [34]. The question of how long the hydrogen termination lasts, especially after oxidative electrochemical treatment [4,17], is an important one to consider; therefore at the minimum, simple contact angle verification before and after experiment is a necessary and important measurement to make.…”

“…Converting to an O-terminated surface is much easier and a variety of techniques have been employed including boiling in acid [103], alumina polishing [17], exposure to oxygen plasma [63,104], photochemical oxidation [34], reaction with oxygen at high temperatures [105], and probably the most common anodic polarization [70,104,106,107]. O-terminated hydrophilic diamond results in water contact angles ranging from 0.6 ∘ to 65 ∘ depending on the method of termination, surface roughness, and so on [86].…”

Using Scanning Electrochemical Microscopy to Determine the Doping Level and the Flatband Potential of Boron‐Doped Diamond Electrodes

“…[1][2][3][4][5] The reaction kinetics on such electrodes is influenced by several factors: the surface chemistry, the morphology and microstructure of the diamond, the density of the defect and nondiamond carbon impurities, the doping type, and the doping level. Whereas highly borondoped diamond films (N A > 3.0 10 20 B cm…”