scholarly journals Metal-Enhanced Fluorescence of Chlorophylls in Single Light-Harvesting Complexes

Nano Letters ◽  
2008 ◽  
Vol 8 (2) ◽  
pp. 558-564 ◽  
Author(s):  
Sebastian Mackowski ◽  
Stephan Wörmke ◽  
Andreas J. Maier ◽  
Tatas H. P. Brotosudarmo ◽  
Hayk Harutyunyan ◽  
...  
Keyword(s):  
Light Harvesting ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence ◽  
Light Harvesting Complexes

scholarly journals Metal-Enhanced Fluorescence of Chlorophylls in Light-Harvesting Complexes Coupled to Silver Nanowires

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Dorota Kowalska ◽  
Bartosz Krajnik ◽  
Maria Olejnik ◽  
Magdalena Twardowska ◽  
Nikodem Czechowski ◽  
...  
Keyword(s):  
Light Harvesting ◽  
Protein Complexes ◽  
Silver Nanowires ◽  
Reference Sample ◽  
Fluorescence Emission ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence ◽  
Light Harvesting Complexes ◽  
Time Resolved ◽  
Chlorophyll Protein

We investigate metal-enhanced fluorescence of peridinin-chlorophyll protein coupled to silver nanowires using optical microscopy combined with spectrally and time-resolved fluorescence techniques. In particular we study two different sample geometries: first, in which the light-harvesting complexes are deposited onto silver nanowires, and second, where solution of both nanostructures are mixed prior deposition on a substrate. The results indicate that for the peridinin-chlorophyll complexes placed in the vicinity of the silver nanowires we observe higher intensities of fluorescence emission as compared to the reference sample, where no nanowires are present. Enhancement factors estimated for the sample where the light-harvesting complexes are mixed together with the silver nanowires prior deposition on a substrate are generally larger in comparison to the other geometry of a hybrid nanostructure. While fluorescence spectra are identical both in terms of overall shape and maximum wavelength for peridinin-chlorophyll-protein complexes both isolated and coupled to metallic nanostructures, we conclude that interaction with plasmon excitations in the latter remains neutral to the functionality of the biological system. Fluorescence transients measured for the PCP complexes coupled to the silver nanowires indicate shortening of the fluorescence lifetime pointing towards modifications of radiative rate due to plasmonic interactions. Our results can be applied for developing ways to plasmonically control the light-harvesting capability of photosynthetic complexes.

scholarly journals Metal-Enhanced Fluorescence of Chlorophylls in Single Light-Harvesting Complexes

2009 ◽  
Vol 1208 ◽  
Author(s):  
Sebastian Mackowski ◽  
Dawid Piatkowski ◽  
Stephan Wörmke ◽  
Achim Hartschuh ◽  
Christoph Bräeuchle ◽  
...  
Keyword(s):  
Single Molecule ◽  
Light Harvesting ◽  
Protein Complexes ◽  
Fluorescence Emission ◽  
Fold Increase ◽  
Metal Nanoparticle ◽  
Metal Nanostructures ◽  
Enhanced Fluorescence ◽  
Light Harvesting Complexes ◽  
Light Harvesting Complex

AbstractWe show that the fluorescence of peridinin-chlorophyll a-protein complexes can be strongly enhanced via coupling with plasmon excitations localized in metal nanostructures. The results of ensemble and single-molecule spectroscopy experiments at room temperature demonstrate six-fold increase of the emission intensity of the light-harvesting complex when it is placed in the vicinity of chemically prepared silver islands. Irrespective of the enhancement, we observe no effect of the metal nanoparticle on the fluorescence emission energy of the complex. This observation implies that plasmon excitations may be applied for controlling the optical properties of complex biomolecules.

scholarly journals Strong plasmonic fluorescence enhancement of individual plant light-harvesting complexes

Nanoscale ◽  
2019 ◽  
Vol 11 (32) ◽  
pp. 15139-15146 ◽  
Author(s):  
Farooq Kyeyune ◽  
Joshua L. Botha ◽  
Bertus van Heerden ◽  
Pavel Malý ◽  
Rienk van Grondelle ◽  
...  
Keyword(s):  
Fluorescence Enhancement ◽  
Light Harvesting ◽  
Protein Complexes ◽  
Photosynthetic Pigment ◽  
Individual Plant ◽  
Enhanced Fluorescence ◽  
Light Harvesting Complexes ◽  
Plasmon Enhanced Fluorescence ◽  
Pigment Protein Complexes

Plasmon-enhanced fluorescence for detection of weakly emitting individual photosynthetic pigment-protein complexes.

scholarly journals Noise-Assisted Discord-Like Correlations in Light-Harvesting Photosynthetic Complexes

2021 ◽  
Vol 3 (2) ◽  
pp. 262-271
Author(s):  
Pablo Reséndiz-Vázquez ◽  
Ricardo Román-Ancheyta ◽  
Roberto León-Montiel
Keyword(s):  
Potential Role ◽  
Energy Transport ◽  
Light Harvesting ◽  
Quantum Correlations ◽  
Transport Processes ◽  
Quantum Evolution ◽  
Light Harvesting Complexes ◽  
Transport Efficiency ◽  
Photovoltaic Materials ◽  
Photosynthetic Complexes

Transport phenomena in photosynthetic systems have attracted a great deal of attention due to their potential role in devising novel photovoltaic materials. In particular, energy transport in light-harvesting complexes is considered quite efficient due to the balance between coherent quantum evolution and decoherence, a phenomenon coined Environment-Assisted Quantum Transport (ENAQT). Although this effect has been extensively studied, its behavior is typically described in terms of the decoherence’s strength, namely weak, moderate or strong. Here, we study the ENAQT in terms of quantum correlations that go beyond entanglement. Using a subsystem of the Fenna–Matthews–Olson complex, we find that discord-like correlations maximize when the subsystem’s transport efficiency increases, while the entanglement between sites vanishes. Our results suggest that quantum discord is a manifestation of the ENAQT and highlight the importance of beyond-entanglement correlations in photosynthetic energy transport processes.

scholarly journals Uncovering the interactions driving carotenoid binding in light-harvesting complexes

2021 ◽  
Author(s):  
Vincenzo Mascoli ◽  
Nicoletta Liguori ◽  
Lorenzo Cupellini ◽  
Eduard Elias ◽  
Benedetta Mennucci ◽  
...  
Keyword(s):  
Protein Stability ◽  
Light Harvesting ◽  
Light Harvesting Complexes

Carotenoids are essential constituents of plant light-harvesting complexes (LHCs), being involved in protein stability, light harvesting, and photoprotection. Unlike chlorophylls, whose binding to LHCs is known to require coordination of...

scholarly journals The molecular mechanisms of light adaption in light-harvesting complexes of purple bacteria revealed by a multiscale modeling

2019 ◽  
Vol 10 (42) ◽  
pp. 9650-9662 ◽  
Author(s):  
Felipe Cardoso Ramos ◽  
Michele Nottoli ◽  
Lorenzo Cupellini ◽  
Benedetta Mennucci
Keyword(s):  
Multiscale Modeling ◽  
Molecular Mechanisms ◽  
Light Harvesting ◽  
Purple Bacteria ◽  
Spectral Tuning ◽  
Light Harvesting Complexes

The spectral tuning of LH2 antenna complexes arises from H-bonding, acetyl torsion, and inter-chromophore couplings.

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