Control of microfabricated structures powered by flagellated bacteria using phototaxis

By Edward B. Steager, Chang-Beom Kim, J. Patel, Socheth Bith, C. Naik, L. Reber, M. J. Kim. 2007

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Bacterial ratchet motors (2009, background): “Phototactic control of such bacterial actuated structures has been recently demonstrated [2, 3] by exposing localized regions of the swarm to ultraviolet light.”
Flagellated Magnetotactic Bacteria as Controlled MRI-trackable Propulsion and Steering Systems for Medical Nanorobots Operating in the Human Microvasculature (2009, unknown): “This demonstration with uncontrolled directional motions was replicated later with chemically stop/resume motion control (Behkem and Sitti 2007) and phototaxis-based stop/resume motion control (Steager et al. 2007)).”
Electrokinetic and optical control of bacterial microrobots (2011, background): “Since MBRs generally exhibit rotational motion in the absence of external stimuli, UV light exposure is an effective means of adjusting angular velocity or completely stopping rotational motion [20].”