Recently, the team of Tang Yongbing, a researcher of the Research Center for Functional Thin Films of the Institute of Advanced Technology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, and the team of Zhao Ying, a researcher of the Human Tissue and Organ Degeneration Center of the Institute of Medicine, have developed The new bionic multi-level diamond functional film with anti-wear and anti-corrosion properties provides solutions for medical protection and anti-fouling of marine instruments. The research results "Robust Biomimetic Hierarchical Diamond Architecture with Self-cleaning, Antibacterial and Antibiofouling Surface" have been published online International materials journal ACS Applied Materials & Interfaces (DOI: 10.1021 / acsami.0c02460m).
Microorganisms adhere to public places, medical devices, and marine precision instruments, resulting in bacterial infections, medical device failures, and degradation of the function of marine instruments. Inhibiting the adhesion of microorganisms can avoid the spread of infectious diseases. However, existing anti-adhesion materials such as polymers have the disadvantages of poor mechanical properties and low chemical stability, which affect the durability of their antibacterial and anti-bioadhesion. Diamond has the advantages of abrasion resistance, corrosion resistance, biocompatibility and so on, and has good application prospects as a new type of anti-adhesion material.
Based on the team's in-depth research on the preparation of diamond thin films, Tang Yongbing, Zhao Ying and their team members Wang Tao, Huang Lei, Liu Yuzhi, Liu Chunhua and others successfully constructed a bionic plant leaf through a self-developed step-by-step planting vapor deposition method The structured super-hydrophobic micro-nano graded diamond functional film realizes the self-cleaning and anti-adhesion functions such as lotus leaf sludge without staining, and has ultra-high mechanical properties and chemical stability. Compared with uncoated titanium alloy, the biomimetic diamond film inhibits the adsorption of 99% E. coli. In the marine environment, the bionic diamond film reduces the adhesion of green algae by more than 95% compared with uncoated titanium alloy and quartz glass. In addition, the wear resistance of the bionic diamond film is more than 20 times that of the uncoated titanium alloy. After immersed in corrosive liquid for 1 month, the physical and chemical properties have not changed, and the antibacterial properties remain unchanged.
At present, this method can realize the preparation of biomimetic diamond thin films on a variety of complex shaped substrates and a variety of commercial substrate materials, including titanium alloys, silicon, quartz glass and ceramic substrates, as antibacterial and bioadhesive materials in high-end medical devices and marine precision The instrument field has good application prospects.