Sunday, January 20, 2013

The pH Taxis of an Intelligent Catalytic Microbot


  1. Krishna Kanti Dey2
  2. Satyapriya Bhandari1,
  3. Dipankar Bandyopadhyay2,3
  4. Saurabh Basu4
  5. Arun Chattopadhyay1,2,*
Article first published online: 14 JAN 2013
DOI: 10.1002/smll.201202312

A Pd nanoparticle-containing polymer microsphere moves with increasing speed across a pH gradient, following differential catalytic decomposition of aqueous hydrogen peroxide. The directional motion is akin to the pH taxis of living microorganisms. The artificial pH taxis exhibits random walk, translation, vertical, hopping, and pulsed motion, when the size of the motor and the imposed pH gradient are modulated

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