Jump to main content
Jump to site search


Plasmon-induced absorption of blind chlorophylls in photosynthetic proteins assembled on silver nanowires

Author affiliations

Abstract

We demonstrate that controlled assembly of eukaryotic photosystem I with its associated light harvesting antenna complex (PSI-LHCI) on plasmonically active silver nanowires (AgNWs) substantially improves the optical functionality of such a novel biohybrid nanostructure. By comparing fluorescence intensities measured for PSI-LHCI complex randomly oriented on AgNWs and the results obtained for the PSI-LHCI/cytochrome c553 (cyt c553) bioconjugate with AgNWs we conclude that the specific binding of photosynthetic complexes with defined uniform orientation yields selective excitation of a pool of chlorophyll (Chl) molecules that are otherwise almost non-absorbing. This is remarkable, as this study shows for the first time that plasmonic excitations in metallic nanostructures can not only be used to enhance native absorption of photosynthetic pigments, but also – by employing cyt c553 as the conjugation cofactor – to activate the specific Chl pools as the absorbing sites only when the uniform and well-defined orientation of PSI-LHCI with respect to plasmonic nanostructures is achieved. As absorption of PSI alone is comparatively low, our approach lends itself as an innovative approach to outperform the reported-to-date biohybrid devices with respect to solar energy conversion.

Graphical abstract: Plasmon-induced absorption of blind chlorophylls in photosynthetic proteins assembled on silver nanowires

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 May 2017, accepted on 02 Jul 2017 and first published on 04 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03866F
Citation: Nanoscale, 2017, Advance Article
  •   Request permissions

    Plasmon-induced absorption of blind chlorophylls in photosynthetic proteins assembled on silver nanowires

    M. Szalkowski, J. D. Janna Olmos, D. Buczyńska, S. Maćkowski, D. Kowalska and J. Kargul, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR03866F

Search articles by author

Spotlight

Advertisements