Recently, the Huang Qing Group of the Institute of Technology Biology and Agricultural Engineering of the Chinese Academy of Sciences and the Wang Qi Group of the Institute of Plasma Physics collaborated to treat graphene oxide with low-temperature plasma and found that the treated graphene oxide was destroyed. Bacteria capacity significantly improved.
As a new type of two-dimensional carbon material, graphene shows great potential in many biomedical fields. However, compared with other traditional antiseptic drugs/materials such as antibiotics, silver, etc., graphene has the ability to sterilize general graphene materials. Weak. In order to improve its sterilizing ability, it is common practice to chemically connect other materials with strong bacteriostatic resistance on graphene materials. However, the chemical treatment process is complex and may cause environmental and health risks. Graphene oxide was treated with low-temperature plasma and its sterilizing effect was studied. It was found that graphene oxide treated with hydrogen plasma caused almost 90% of bacterial inactivation at a concentration of 0.02 mg/mL, which was much higher than that of untreated ones. The ability to oxidize graphene oxide. To explore its causes, the researchers performed graphene oxide graphene (AFM) before and after processing, characterized by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Analysis and scanning electron microscopy (SEM) analysis of the treated bacterial samples revealed that plasma treatment not only efficiently reduces graphene and reduces its size, but also leads to graphite oxide. The surface defects increase, forming multiple irregular columnar or needle-like protrusions, which leads to the leakage of cell contents and bacterial death. The study shows that low-temperature plasma can be used as an effective physical treatment method to modify graphenes. Materials and improve its antibacterial ability to sterilize.
The relevant research results were published in Applied Physics Letters. The research was funded by key research and development programs in Anhui Province, the National Natural Science Foundation of China, the Natural Science Foundation of Anhui Province, and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.
Figure 1. AFM, Raman (spectral and ID/IG imaging) and XPS characterization of graphene oxide before (a, c, e, h, j) and after (b, d, f, i, k).
Figure 2. Comparison of graphene oxide sterilization capabilities before and after plasma treatment
