An article from News@nature.com explains how single-celled bacteria are used to assemble parts of nano-machines, the super-miniature silicon chips that process information. The bacteria act as a sort of glue that binds nano-parts together. The bacteria are guided into place by small electric currents. The outer surfaces of the bacteria naturally contain proteins that stick to certain molecules. When nano-parts tagged with these molecules are placed in a fluid and washed over the area, the tagged parts stick to the right nano-spot. Link.
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