Journal
SURFACE & COATINGS TECHNOLOGY
Volume 206, Issue 6, Pages 1037-1040Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2011.07.034
Keywords
a-C:H film; Copper dopant; Antibacterial activity
Funding
- Center of Excellence for Clinical Trial and Research in Neurology and Neurosurgery, Taipei Medical University-Wan Fang Hospital [DOH99-TD-B-111-003]
- Cathy General Hospital
- Taipei Medical University Hosptial [100CGH-TMU-09, 98TMU-TMUH-07]
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A hydrogenated diamond-like carbon (a-C:H) with a copper dopant (Cu/a-C:H) was deposited on glass substrates using a combined radio-frequency plasma and magnetron sputtering deposition process under various Ar/CH4 gas mixtures. The effects of the Cu content on the structure and properties of the a-C:H matrix were investigated using X-ray diffraction (XRD), Raman transmission electron microscopy, high-resolution transmission electron microscopy (TEM), and nano-indentation. The bacterial activity of a Cu/a-C:H film was evaluated with Escherichia coli (E. coli). TEM images and XRD spectra demonstrated that composite films containing copper nanoparticles embedded in the a-C:H were deposited on the glass substrates. The Raman spectra showed the structure of a-C:H film was substantially changed by the incorporation of Cu. The Cu/a-C:H films offered superior antibacterial activity against E. coli indicating that they could be suitable for surface coatings in cardiovascular applications. (C) 2011 Elsevier B.V. All rights reserved.
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