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Applied Physics Letters / Volume 97 / Issue 5 / ELECTRONIC TRANSPORT AND SEMICONDUCTORS

Appl. Phys. Lett. 97, 052103 (2010); http://dx.doi.org/10.1063/1.3476346 (3 pages)

Electrochemical hydrogen termination of boron-doped diamond

René Hoffmann, Armin Kriele, Harald Obloh, Jakob Hees, Marco Wolfer, Waldemar Smirnov, Nianjun Yang, and Christoph E. Nebel

Fraunhofer Institute for Applied Solid State Physics (IAF), Tullastraße 72, Freiburg 79108, Germany

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(Received 18 June 2010; accepted 16 July 2010; published online 4 August 2010)

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).

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

boron, contact angle, diamond, electrolytes, hydrogenation, hydrophobicity, plasma CVD, scanning electron microscopy, surface treatment, transducers, voltammetry (chemical analysis), X-ray photoelectron spectra

PACS

  • 81.65.Cf

    Surface cleaning, etching, patterning

  • 82.80.Fk

    Electrochemical methods

  • 81.05.ug

    Diamond

  • 07.07.Mp

    Transducers

  • 82.45.Gj

    Electrolytes

  • 68.03.Cd

    Surface tension and related phenomena

  • 82.80.Pv

    Electron spectroscopy (X-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3476346

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    D. A. Shirley, Phys. Rev. B 5, 4709 (1972).

    J. B. Cui, J. Ristein, and L. Ley, Phys. Rev. Lett. 81, 429 (1998).


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