Ferritin about for Ti: The cage-shaped protein supramolecule apoferritin is genetically modified to have Ti-specific affinity peptides outside its protein shell (minT1-LF). Mobile peptides bestow a strong adsorption force to a Ti surface and the placement of minT1-LF with ferrihydrite or Co3O4 nanoparticles onto nanometric Ti patterns is experimentally demonstrated. This biological method opens up a new pathway to nanoparticle placement (the picture shows minT1-LF; four subunits are removed to show the NP core).
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