Electrochemical hydrogen termination of boron-doped diamond

Boron-doped diamond is a promising transducer material for numerous devices which are designed for contact with electrolytes. For optimized electron transfer the surface of diamond needs to be hydrogen terminated. Up to now H-termination of diamond is done by plasma chemical vapor deposition techniq...

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Bibliographic Details
Published in:Applied physics letters 2010-08, Vol.97 (5), p.052103-052103-3
Main Authors: Hoffmann, René, Kriele, Armin, Obloh, Harald, Hees, Jakob, Wolfer, Marco, Smirnov, Waldemar, Yang, Nianjun, Nebel, Christoph E.
Format: Article
Language:English
Subjects:
AFFINITY
BORON
CARBON
CHEMICAL COATING
CHEMICAL REACTIONS
CHEMICAL VAPOR DEPOSITION
CHEMISTRY
CYANIDES
DEPOSITION
DIAMONDS
DOPED MATERIALS
ELECTROCHEMISTRY
ELECTROLYTES
ELECTRON EXCHANGE
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELECTRON TRANSFER
ELEMENTS
HYDROGEN
HYDROGENATION
IRON COMPOUNDS
MATERIALS
MATERIALS SCIENCE
MICROSCOPY
MINERALS
NONMETALS
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PLASMA
SCANNING ELECTRON MICROSCOPY
SEMIMETALS
SPECTROSCOPY
SURFACE COATING
SURFACE TREATMENTS
SURFACES
TRANSDUCERS
TRANSITION ELEMENT COMPOUNDS
VOLTAMETRY
X-RAY PHOTOELECTRON SPECTROSCOPY
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Summary:Boron-doped diamond is a promising transducer material for numerous devices which are designed for contact with electrolytes. For optimized electron transfer the surface of diamond needs to be hydrogen terminated. Up to now H-termination of diamond is done by plasma chemical vapor deposition techniques. In this paper, we show that boron-doped diamond can be H-terminated electrochemically by applying negative voltages in acidic solutions. Electrochemical H-termination generates a clean surface with virtually no carbon-oxygen bonds (x-ray photoelectron spectroscopy), a reduced electron affinity (scanning electron microscopy), a highly hydrophobic surface (water contact angle), and a fast electron exchange with Fe ( CN ) 6 − 3 / − 4 (cyclic voltammetry).
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3476346