Chemical modification of the diamond surface using benzoyl peroxide and dicarboxylic acids

Shintaro Ida, Toshiki Tsubota, Shunsuke Tanii, Masanori Nagata, Yasumichi Matsumoto

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

We report a new method for introducing carboxylic groups onto the diamond surface. Hydrogenated diamond surfaces were treated in a solvent containing benzoyl peroxide and dicarboxylic acid. Surface characterization was performed by diffuse reflectance infrared Fourier transform transform spectroscopy. After the reaction, a C=O peak appeared, and the shape of the C-H peak at 2780-2960 cm-1 depended on the kind of dicarboxylic acid. When deuterium-labeled diamond powders were treated in the same manner, aliphatic C-H peaks were observed in the range 2780-2960 cm-1. The C-H peaks were assigned to the -(CH2)n-groups of the dicarboxylic acids bonding to the diamond surface. When the modified diamond surfaces were treated with NaOH(aq), peaks assigned to the C=O bond of the -COONa groups appeared at 1578 cm-1, which indicated that carboxylic groups were present on the diamond surface. The presence of HOOC- (CH2)n-OCO- groups on the diamond surface has been demonstrated.

Original languageEnglish
Pages (from-to)9693-9698
Number of pages6
JournalLangmuir
Volume19
Issue number23
DOIs
Publication statusPublished - Nov 11 2003

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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