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Culturing photosynthetic bacteria through surface plasmon resonance

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Culturing photosynthetic bacteria through surface plasmon resonance

Retrieved by DonEMitchell 04:56, 19 December 2012 (MST) from http://apl.aip.org/resource/1/applab/v101/i25/p253701_s1
Applied Physics Letters
Matthew D. Ooms, Lauren Bajin, and David Sinton

Department of Mechanical and Industrial Engineering and Centre for Sustainable Energy, University of Toronto, Toronto M5S 3G8, Canada

(Received 26 October 2012; accepted 29 November 2012; published online 17 December 2012)

Abstract
In this work, cultivation of photosynthetic microbes in surface plasmon enhanced evanescent fields is demonstrated. Proliferation of Synechococcus elongatus was obtained on gold surfaces excited with surface plasmons. Excitation over three days resulted in 10 μm thick biofilms with maximum cell volume density of 20% vol/vol (2% more total accumulation than control experiments with direct light). Collectively, these results indicate the ability to (1) excite surface-bound cells using plasmonic light fields, and (2) subsequently grow thick biofilms by coupling light from the surface. Plasmonic light delivery presents opportunities for high-density optofluidic photobioreactors for microalgal analysis and solar fuel production.

© 2012 American Institute of Physics