Presentation Information
[24p-P02-3]Surface functionalized diamond coatings for antibacterial applications
Ruoying Zhang1, Nianhua Peng2, Meiyong Liao3, 〇(P)Haitao Ye1 (1.Leicester Univ., UK, 2.Univ. of Surrey, UK, 3.NIMS, Japan)
Keywords:
diamond,antibacterial,morphology
Microorganism-induced corrosion in marine engineering has resulted in significant losses. Antibacterial coatings, grown using chemical vapor deposition, such as ultrananocrystalline diamond (UNCD), nanocrystalline diamond (NCD), and microcrystalline diamond (MCD), have shown promise as a solution. These coatings exhibit varying hydrophobic/hydrophilic properties due to different sp3/sp2 carbon bond ratios, influencing their anti-adhesion behavior against bacteria. This property is crucial for their antibacterial effectiveness. The results indicate that UNCD, NCD, and MCD coatings kill bacteria through a combination of mechanical effects and surface functional groups. These coatings are effective against both Gram-negative (E. coli) and Gram-positive (B. subtilis) bacteria within 1-6 hours of contact. Prolonged contact, especially with MCD coatings, significantly reduces bacterial colonies and enhances bacteriostatic rates for both E. coli and B. subtilis.