Nanoparticle delivery by controlled bacteria.

We present a new approach for nano-object directional delivery by bacteria based upon a taxis-controlled mechanism. In this method, a stimulus is used to direct the bacteria's motion. When carrying nano-objects, the bacteria demonstrated the ability to deliver the "loads" to targets where the stimulus is positioned. The scheme of using taxis for targeted delivery may hold a promising future for a new route to bridge nanotechnology and biotechnology.