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  1. Article ; Online: Spectral Dependence of the Energy Transfer from Photosynthetic Complexes to Monolayer Graphene

    Marcin Szalkowski / Alessandro Surrente / Kamil Wiwatowski / Zhuo Yang / Nan Zhang / Julian D. Janna Olmos / Joanna Kargul / Paulina Plochocka / Sebastian Maćkowski

    International Journal of Molecular Sciences, Vol 23, Iss 3493, p

    2022  Volume 3493

    Abstract: Fluorescence excitation spectroscopy at cryogenic temperatures carried out on hybrid assemblies composed of photosynthetic complexes deposited on a monolayer graphene revealed that the efficiency of energy transfer to graphene strongly depended on the ... ...

    Abstract Fluorescence excitation spectroscopy at cryogenic temperatures carried out on hybrid assemblies composed of photosynthetic complexes deposited on a monolayer graphene revealed that the efficiency of energy transfer to graphene strongly depended on the excitation wavelength. The efficiency of this energy transfer was greatly enhanced in the blue-green spectral region. We observed clear resonance-like behavior for both a simple light-harvesting antenna containing only two chlorophyll molecules (PCP) and a large photochemically active reaction center associated with the light-harvesting antenna (PSI–LHCI), which pointed towards the general character of this effect.
    Keywords graphene ; energy transfer ; fluorescence ; photosynthetic complexes ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Fine Structure Splitting of Phonon-Assisted Excitonic Transition in (PEA) 2 PbI 4 Two-Dimensional Perovskites

    Katarzyna Posmyk / Mateusz Dyksik / Alessandro Surrente / Katarzyna Zalewska / Maciej Śmiertka / Ewelina Cybula / Watcharaphol Paritmongkol / William A. Tisdale / Paulina Plochocka / Michał Baranowski

    Nanomaterials, Vol 13, Iss 1119, p

    2023  Volume 1119

    Abstract: Two-dimensional van der Waals materials exhibit particularly strong excitonic effects, which causes them to be an exceptionally interesting platform for the investigation of exciton physics. A notable example is the two-dimensional Ruddlesden–Popper ... ...

    Abstract Two-dimensional van der Waals materials exhibit particularly strong excitonic effects, which causes them to be an exceptionally interesting platform for the investigation of exciton physics. A notable example is the two-dimensional Ruddlesden–Popper perovskites, where quantum and dielectric confinement together with soft, polar, and low symmetry lattice create a unique background for electron and hole interaction. Here, with the use of polarization-resolved optical spectroscopy, we have demonstrated that the simultaneous presence of tightly bound excitons, together with strong exciton–phonon coupling, allows for observing the exciton fine structure splitting of the phonon-assisted transitions of two-dimensional perovskite (PEA) <semantics> 2 </semantics> PbI <semantics> 4 </semantics> , where PEA stands for phenylethylammonium. We demonstrate that the phonon-assisted sidebands characteristic for (PEA) <semantics> 2 </semantics> PbI <semantics> 4 </semantics> are split and linearly polarized, mimicking the characteristics of the corresponding zero-phonon lines. Interestingly, the splitting of differently polarized phonon-assisted transitions can be different from that of the zero-phonon lines. We attribute this effect to the selective coupling of linearly polarized exciton states to non-degenerate phonon modes of different symmetries resulting from the low symmetry of (PEA) <semantics> 2 </semantics> PbI <semantics> 4 </semantics> lattice.
    Keywords 2D perovskites ; exciton ; phonon ; optical spectroscopy ; fine structure splitting ; (PEA)2PbI4 ; Chemistry ; QD1-999
    Subject code 511
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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