Electroless oxidation of boron-doped diamond surfaces: comparison between four oxidizing agents; Ce⁴⁺, MnO₄^−, H₂O₂ and S₂O₈^2−

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• 作者：G. Charrier^a ; S. Lé ; vy^a ; J. Vigneron^a ; A. Etcheberry^a ; N. Simon ; ^a ; ^{simon@chimie.uvsq.fr"" rel=""nofollow}
• 关键词：Boron-doped polycrystalline diamond ; Electroless oxidation ; Chemical oxidation ; oxygen functional group ; Wettability ; Mott– ; Schottky plots ; XPS ; Charge transfer
• 刊名：Diamond and Related Materials
• 出版年：2011
• 出版时间：July 2011
• 年：2011
• 卷：20
• 期：7
• 页码：944-950
• 全文大小：559 K

文摘

The electrochemical properties of diamond are very sensitive to the surface terminations. It is still a challenge to successfully produce well-defined “C–O” functions. In this paper, we describe and compare the oxidation of as-grown polycrystalline boron-doped diamond (BDD) films using four different oxidizing agents in aqueous media: Ce⁴⁺, MnO₄^−, H₂O₂ and S₂O₈^2−. The different treatments lead to the formation of oxygenated functions at the diamond surface, mainly singly oxidized “C–O” groups such as “C–OH” or “C–O–C”. Processes with Ce⁴⁺ and MnO₄^− seem to be particularly interesting as they both lead to the creation of a high amount of oxygenated functions and an improvement of the charge transfer at BDD surfaces.