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The pH Taxis of an Intelligent Catalytic Microbot

Authors

  • Krishna Kanti Dey,

    1. Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati–781039, India
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  • Satyapriya Bhandari,

    1. Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati–781039, India, Phone: +91-361-258 2304, Fax: +91-361-258-2349
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  • Dipankar Bandyopadhyay,

    1. Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati–781039, India
    2. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati–781039, India
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  • Saurabh Basu,

    1. Department of Physics, Indian Institute of Technology Guwahati, Guwahati–781039, India
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  • Arun Chattopadhyay

    Corresponding author
    1. Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati–781039, India, Phone: +91-361-258 2304, Fax: +91-361-258-2349
    2. Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati–781039, India
    • Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati–781039, India, Phone: +91-361-258 2304, Fax: +91-361-258-2349.
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Abstract

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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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