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Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus

Abstract : The fluorescence of photosystem I (PSI) trimers in proximity to bimetallic plasmonic nanostructures have been explored by single-molecule spectroscopy (SMS) at cryogenic temperature (1.6 K). PSI serves as a model for biological multichromophore-coupled systems with high potential for biotechnological applications. Plasmonic nanostructures are fabricated by thermal annealing of thin metallic films. The fluorescence of PSI has been intensified due to the coupling with plasmonic nanostructures. Enhancement factors up to 22.9 and 5.1 are observed for individual PSI complexes coupled to Au/Au and Ag/Au samples, respectively. Additionally, a wavelength dependence of fluorescence enhancement is observed, which can be explained by the multichromophoric composition of PSI.
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https://hal-utt.archives-ouvertes.fr/hal-02484586
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Wednesday, February 19, 2020 - 2:52:44 PM
Last modification on : Wednesday, July 15, 2020 - 11:52:04 AM

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Imran Ashraf, Sepideh Skandary, Mohammad Khaywah, Michael Metzger, Alfred Meixner, et al.. Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus. Light-Harvesting Processes LHP 2015, Mar 2015, Bad Staffelstein, Germany. ⟨10.3390/photonics2030838⟩. ⟨hal-02484586⟩

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