Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4908259
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Funding
- Natural Science and Engineering Research Council of Canada
- University of Toronto Connaught Global Scholars Program in Bio-Inspired Ideas for Sustainable Energy
- University of Toronto McLean Senior Fellowship
- Vanier Canada Graduate Scholarship
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Optimal photon management is a key challenge for photobioreactor design, since light gradients and varying spectral sensitivities between organisms result in uneven illumination and unused photons. This paper demonstrates wavelength specific scattering from plasmonic nano-patterned surfaces as a means of addressing the challenge of photon management in photobioreactors. Modular photobioreactors were constructed with different reflective substrates including arrays of plasmonic nanodisks, broadband reflectors, and untreated glass. It was found that the growth rate of cyanobacterium S. elongatus in photobioreactors equipped with a plasmonic substrate (R-623 (nm) similar to 35%) was enhanced by 6.5% compared to photobioreactors equipped with untreated glass. Furthermore, plasmonic reflectors showed a normalized power efficiency improvement of 52% over broadband reflectors. Wavelength-specific reflection from plasmonic reflectors increases the flux of useful light to cultures without sacrificing the full spectrum. (C) 2015 AIP Publishing LLC.
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