Do CVD grown graphene films have antibacterial activity on metallic substrates?
arXiv:1412.0472 · doi:10.1016/j.carbon.2014.12.025
Abstract
Accurate assessment of the antibacterial activity of graphene requires consideration of both the graphene fabrication method and, for supported films, the properties of the substrate. Large-area graphene films produced by chemical vapor deposition were grown directly on copper substrates or transferred on a gold substrate and their effect on the viability and proliferation of the Gram-positive bacteria Staphylococcus aureus and the Gram-negative bacteria Escherichia coli were assessed. The viability and the proliferation of both bacterial species were not affected when they were grown on a graphene film entirely covering the gold substrate, indicating that conductivity plays no role on bacterial viability and graphene has no antibacterial activity against S. aureus and E. coli. On the other hand, antibacterial activity was observed when graphene coated the copper substrates, resulting from the release of bactericidal cupric ions in inverse proportion to the graphene surface coverage.
arXiv comment24 pages, 7 figures (paper+supplementary material), accepted for publication in Carbon
References in corpus (8)
- The Raman Fingerprint of Graphene
- Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils
- Doping graphene with metal contacts
- Interaction between graphene and copper substrate: The role of lattice orientation
- Doping of graphene by a Au(111) substrate: Calculation strategy within the local density approximation and a semiempirical van der Waals approach
- The influence of residual oxidizing impurities on the synthesis of graphene by atmospheric pressure chemical vapor deposition
- Determination of Carrier Type Doped from Metal Contacts to Graphene by Channel-Length-Dependent Shift of Charge Neutrality Points
- Electronic Properties of Clean Au-Graphene Contacts