Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus
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 biotechnologica...
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MDPI AG
2015-07-01
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| Series: | Photonics |
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| Online Access: | http://www.mdpi.com/2304-6732/2/3/838 |
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| author | Imran Ashraf Sepideh Skandary Mohammad Y. Khaywah Michael Metzger Alfred J. Meixner Pierre M. Adam Marc Brecht |
| author_facet | Imran Ashraf Sepideh Skandary Mohammad Y. Khaywah Michael Metzger Alfred J. Meixner Pierre M. Adam Marc Brecht |
| author_sort | Imran Ashraf |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-12T04:29:26Z |
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| id | doaj.art-ad4d3028bb514f30a9918cc3c37f19b4 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-12-12T04:29:26Z |
| publishDate | 2015-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-ad4d3028bb514f30a9918cc3c37f19b42022-12-22T00:38:08ZengMDPI AGPhotonics2304-67322015-07-012383885410.3390/photonics2030838photonics2030838Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatusImran Ashraf0Sepideh Skandary1Mohammad Y. Khaywah2Michael Metzger3Alfred J. Meixner4Pierre M. Adam5Marc Brecht6IPTC and Lisa+ Center, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, GermanyIPTC and Lisa+ Center, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, GermanyLaboratory of Nanotechnology, Instrumentation and Optics, University of Technology of Troyes, 12 Rue Marie Curie, CS 42060, 10004 Troyes Cedex, FranceIPTC and Lisa+ Center, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, GermanyIPTC and Lisa+ Center, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, GermanyLaboratory of Nanotechnology, Instrumentation and Optics, University of Technology of Troyes, 12 Rue Marie Curie, CS 42060, 10004 Troyes Cedex, FranceIPTC and Lisa+ Center, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, GermanyThe 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.http://www.mdpi.com/2304-6732/2/3/838plasmonicbimetallic nanostructuresthermal annealingphotosystem Isingle-molecule spectroscopyfluorescence emission enhancement |
| spellingShingle | Imran Ashraf Sepideh Skandary Mohammad Y. Khaywah Michael Metzger Alfred J. Meixner Pierre M. Adam Marc Brecht Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus Photonics plasmonic bimetallic nanostructures thermal annealing photosystem I single-molecule spectroscopy fluorescence emission enhancement |
| title | Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus |
| title_full | Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus |
| title_fullStr | Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus |
| title_full_unstemmed | Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus |
| title_short | Effects of Irregular Bimetallic Nanostructures on the Optical Properties of Photosystem I from Thermosynechococcus elongatus |
| title_sort | effects of irregular bimetallic nanostructures on the optical properties of photosystem i from thermosynechococcus elongatus |
| topic | plasmonic bimetallic nanostructures thermal annealing photosystem I single-molecule spectroscopy fluorescence emission enhancement |
| url | http://www.mdpi.com/2304-6732/2/3/838 |
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