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Light-Patterned Current Generation in a Droplet Bilayer Array.

Vanessa Restrepo Schild1, Michael J Booth1, Stuart J Box1

  • 1Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.

Scientific Reports
|April 19, 2017
PubMed
Summary
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Researchers developed a light-activatable bio-pixel array using bacteriorhodopsin (bR) for detecting light patterns. This synthetic biology approach offers potential for interfacing with biological tissues.

Area of Science:

  • Synthetic Biology
  • Biophysics
  • Materials Science

Background:

  • Bacteriorhodopsin (bR) functions as a light-driven proton pump.
  • Bio-inspired sensors require integration of biological components with electronic readout.
  • Soft materials offer biocompatibility for potential tissue interfacing.

Purpose of the Study:

  • To engineer a light-activatable array of aqueous droplet bio-pixels.
  • To demonstrate the detection of light patterns and grey-scale images using the array.
  • To explore the potential of synthetic biological arrays for interfacing with living tissues.

Main Methods:

  • Fabrication of a 4x4 droplet bilayer array in a lipid-oil environment on a hydrogel surface.
  • Incorporation of bacteriorhodopsin (bR) into lipid bilayers at droplet-hydrogel interfaces.

Related Experiment Videos

  • Integration of electrodes for measuring light-driven proton-pumping activity in each bio-pixel.

    • Main Results:

    • The 4x4 array successfully detected grey-scale images and moving light patterns.
    • Light-induced proton-pumping activity was transduced into measurable electrical current for each bio-pixel.
    • The array demonstrated bottom-up fabrication using synthetic biology principles.

    Conclusions:

    • Synthetic biological light-activatable arrays can be constructed using soft materials.
    • These arrays can transduce optical information into electrical signals.
    • Potential applications include interfacing with neuronal pathways for stimulation.