Influence of Surface Orientation on Electrochemical Properties of Boron-Doped Diamond

Tribidasari A. Ivandini, Takeshi Watanabe, Takahiro Matsui, Yusuke Ootani, Shota Iizuka, Ryo Toyoshima, Hideyuki Kodama, Hiroshi Kondoh, Yoshitaka Tateyama, Yasuaki Einaga

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

To study the influence of crystal orientation on the electrochemical properties of boron-doped diamond (BDD), electrodes comprising (100) and (111) homoepitaxial single-crystal layers of BDD were investigated and these were compared with a thin polycrystalline BDD electrode. The BDD samples with similar amounts of boron of around 10 20 cm -3 and resistivity of around 6 × 10 -3 ? cm were prepared. Evaluation of the electrochemical reactivity of each of the samples with both H- and O-terminated surfaces showed that polycrystalline BDD was the most reactive, whereas the (111) samples proved to be more reactive than the (100) ones for single-crystal BDD. Moreover, considering the results of first-principles molecular dynamics simulations, it is proposed that surface transfer doping is the dominating factor for H-terminated surfaces, whereas the degree of band bending and the thickness of the space-charge layer are the dominating factors for O-terminated surfaces.

Original languageEnglish
Pages (from-to)5336-5344
Number of pages9
JournalJournal of Physical Chemistry C
Volume123
Issue number9
DOIs
Publication statusPublished - 2019 Mar 7

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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