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Nanographene oxide interacting with bacteria, TEM. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.
False-coloured transmission electron micrograph (TEM) of nanographene oxide sheets (purple; background) interacting with two rod shaped bacteria (pink/green/brown; foreground). Graphene is a 2-dimensional sheet of carbon one atom thick, and has been described as a wonder material as it is one of the thinnest, strongest materials so far discovered and conducts electricity more efficiently than copper. Nanographene oxide represents nano-sized graphene sheets in which carbon atoms are linked to oxygen functional groups. It can be prepared by subjecting graphite to a series of oxidative reactions. Length of each individual bacterium is approximately 2 micrometres. Transmission electron micrograph 2015