Repulsive effects of hydrophobic diamond thin films on biomolecule detection

A. Rahim Ruslinda, Y. Ishiyama, V. Penmatsa, S. Ibori, H. Kawarada

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The repulsive effect of hydrophobic diamond thin film on biomolecule detection, such as single-nucleotide polymorphisms and human immunodeficiency virus type 1 trans-activator of transcription peptide protein detection, was investigated using a mixture of a fluorine-, amine-, and hydrogen-terminated diamond surfaces. These chemical modifications lead to the formation of a surface that effectively resists the nonspecific adsorption of proteins and other biomolecules. The effect of fluorine plasma treatment on elemental composition was also investigated via X-ray photoelectron spectroscopy (XPS). XPS results revealed a fluorocarbon layer on the diamond thin films. The contact angle measurement results indicated that the fluorine-treated diamond thin films were highly hydrophobic with a surface energy value of ∼25 mN/m.

Original languageEnglish
Pages (from-to)314-318
Number of pages5
JournalApplied Surface Science
Volume328
DOIs
Publication statusPublished - 2015 Feb 15

Keywords

  • Biomolecules
  • Chemical modification
  • Diamond film
  • Fluorine

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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