Description:

Using specific peptide-bacteria affinity, a monolayer of 30 nm Au particles is selectively deposited on live bacteria surfaces to produce electrically conducting bridges spanning over 12 μm. The conductivity of the monolayer network is further improved by over 10-fold by "electric-field annealing".

Above in (a), (b) are typical FESEM images showing bacteria coated with Au nanoparticle monolayers and spanning between two Au electrodes at the extreme ends. The size bar is 1μm. (c) The nanoparticle size and monolayer morphology are more evident at higher magnification. The size marker is 300 nm.

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