Deposition of silicon doped and pure hydrogenated amorphous carbon coatings on quartz crystal microbalance sensors for protein adsorption studies

Rupert Kargl*, Markus Kahn, Stefan Köstler, Martin Reischl, Aleš Doliška, Karin Stana-Kleinschek, Wolfgang Waldhauser, Volker Ribitsch

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this study hydrogenated amorphous carbon films (a-C:H) and silicon doped hydrogenated amorphous carbon films (a-C:H:Si) with different hydrogen and silicon contents were deposited onto sensors of a quartz crystal microbalance with dissipation detection (QCM-D). The resulting films were investigated with regard to their structural and elemental compositions using Raman spectroscopy, elastic recoil detection analysis and Rutherford backscattering spectroscopy. Furthermore the surface free energy (SFE) of the films was determined using contact angle measurements. The polar part of SFE of the a-C:H:Si films was found to be adjustable by the silicon content in these films and increased by increasing amounts of silicon. Carbon films with a broad range of chemical composition showed similar structure and properties when deposited on QCM-D sensors as compared with the deposition on silicon wafers. Subsequently, the amorphous carbon coated QCM-D sensors were used to study the adsorption of human serum albumin. These QCM-D results were related to the surface properties of the films.

Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalThin solid films
Volume520
Issue number1
DOIs
Publication statusPublished - 31 Oct 2011
Externally publishedYes

Keywords

  • Amorphous carbon films
  • Biocompatibility
  • Biomaterial
  • Human serum albumin
  • Protein adsorption
  • Quartz crystal microbalance
  • Raman spectroscopy
  • Surface energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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