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Mechanical properties and antibacterial activity of copper doped diamond-like carbon films

2011; Elsevier BV; Volume: 206; Issue: 6 Linguagem: Inglês

10.1016/j.surfcoat.2011.07.034

1879-3347

Yu-Hao Chan, Chung-Fang Huang, Keng‐Liang Ou, Pei‐Wen Peng,

Carbon Nanotubes in Composites

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.