Laboratoire de réactivité de surface

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  • Article dans une revue

Light-adapted charge-separated state of photosystem II: structural and functional dynamics of the closed reaction center

Melinda Magyar, Alberto Mezzetti, Parveen Akhtar, Qingjun Zhu, Yanan Xiao, Guangye Han, Stefano Santabarbara, Jian-Ren Shen, Petar Lambrev, Győző Garab, Gábor Sipka

Photosystem II (PSII) uses solar energy to oxidize water and delivers electrons for life on Earth. The photochemical reaction center of PSII is known to possess two stationary states. In the open state (PSIIO), the absorption of a single photon triggers electron-transfer steps, which convert PSII…

The Plant cell, 2021, 33 (4), pp.1286-1302. ⟨10.1093/plcell/koab008⟩. ⟨hal-04025235⟩

  • Article dans une revue

Fatty Acid Monolayers on Randomly Nanostructured Inorganic Surfaces: Interplay of Wettability, Chemistry, and Topography

Mathieu Beauvais, Irma Liascukiene, Alain Jonas, Jessem Landoulsi

Understanding the wetting properties of chemically modified inorganic surfaces with random nanoscale topographies is of fundamental importance for diverse applications. This issue has hitherto continuously been the subject of considerable controversies. Herein, we report a thorough investigation of…

Langmuir, 2020, 36 (40), pp.11845-11854. ⟨10.1021/acs.langmuir.0c01878⟩. ⟨hal-04024823⟩

  • Article dans une revue

Measuring Changes in Wettability and Surface Area during Micro Droplet Corrosion Measurements

Samantha Michelle Gateman, Oumaïma Gharbi, Mireille Turmine, Vincent Vivier

We report a new method for directly monitoring dynamic surface wetting that occurs during electrochemical droplet cell corrosion measurements on an Al alloy and Cu galvanic couple. The combination of a goniometer and potentiostat enabled the in situ observation of wettability during polarization of…

Electrochimica Acta, 2021, 399, pp.139402. ⟨10.1016/j.electacta.2021.139402⟩. ⟨hal-03377329⟩

  • Article dans une revue

Structural studies of adsorbed protein (betalactoglobulin) on natural clay (montmorillonite)

Ali Assifaoui, Lucie Huault, Cyrielle Maissiat, Chloé Roullier-Gall, Philippe Jeandet, Jerôme Hirschinger, Jesus Raya, Maguy Jaber, Jean-François Lambert, Philippe Cayot, Régis Gougeon, Camille Loupiac

In this work, the adsorption of a small globular protein (betalactoglobulin, BLG), on a natural montmorillonite clay (Mt) was investigated in acidic buffer (pH = 3). The combination of different characterization techniques such as zetametry, X-ray diffraction, transmission electronic microscopy,…

RSC Advances, 2014, 4 (105), pp.61096-61103. ⟨10.1039/C4RA11607K⟩. ⟨hal-02358967⟩

  • Article dans une revue

Complementarity of Density Functional Theory and Nuclear Magnetic Resonance Tools To Probe the Nano-Layered Silicates Surface Chemistry and Morphology

Mathilde Poirier, Yannick Millot, Elisa Silva Gomes, Maguy Jaber, Virginie Herledan, Guillaume Laugel, Pierre Micoud, François Martin, Hélène Lauron-Pernot, Hervé Toulhoat

By combining experimental, spectroscopic, structural, and physical characterizations and extensive density functional theory simulations, unprecedented insight is gained on the local surface properties of synthetic talc nanoparticles, their structure, morphology and particle size distribution.…

Journal of Physical Chemistry C, 2020, 124 (1), pp.267-286. ⟨10.1021/acs.jpcc.9b05903⟩. ⟨hal-02457727⟩

  • Article dans une revue

Potential Role of Inorganic Confined Environments in Prebiotic Phosphorylation

Avinash Vicholous Dass, Maguy Jaber, André Brack, Frédéric Foucher, Terence P Kee, Thomas Georgelin, Frances Westall

A concise outlook on the potential role of confinement in phosphorylation and phosphate condensation pertaining to prebiotic chemistry is presented. Inorganic confinement is a relatively uncharted domain in studies concerning prebiotic chemistry, and even more so in terms of experimentation.…

Life, 2018, 8 (1), pp.7. ⟨10.3390/life8010007⟩. ⟨hal-01733453⟩

  • Article dans une revue

Identification of a Ubiquinone-Ubiquinol Quinhydrone Complex in Bacterial Photosynthetic Membranes and Isolated Reaction Centers by Time-Resolved Infrared Spectroscopy

Alberto Mezzetti, Jean-Francois Paul, Winfried Leibl

Ubiquinone redox chemistry is of fundamental importance in biochemistry, notably in bioenergetics. The bi-electronic reduction of ubiquinone to ubiquinol has been widely studied, including by Fourier transform infrared (FTIR) difference spectroscopy, in several systems. In this paper, we have…

International Journal of Molecular Sciences, 2023, International Journal of Molecular Sciences, 24 (6), pp.5233. ⟨10.3390/ijms24065233⟩. ⟨hal-04133205⟩

  • Thèse

Interaction between Orange Carotenoid Protein and mesoporous silica : from spectroscopic investigations to photoactive nanodevices, Interaction entre la Orange Carotenoid Protein et la silice mésoporeuse : des investigations spectroscopiques aux nanodispositifs photo-actifs

Silvia Leccese

This thesis deals with the study of interactions between the Orange Carotenoid Protein and mesoporous silica SBA-15, aiming to the development of photoactive nano-devices. The photoactive Orange Carotenoid Protein (OCP) is a protein involved in photo-protective responses in cyanobacteria. It…, Ce projet de thèse concerne l’étude des interactions entre la Orange Carotenoid Protein (OCP) et la silice mésoporeuse SBA-15, visant à la mise au point de nanodispositifs photo-actifs. La OCP est une protéine photo-active impliquée dans la photoprotection des cyanobactéries. Il implique la…

Material chemistry. Sorbonne Université, 2022. English. ⟨NNT : 2022SORUS537⟩. ⟨tel-04132906⟩

  • Article dans une revue

Oxidation of gold metal particles supported on TiO2: an FTIR study by means of low-temperature CO adsorption

Hr. Klimev, Katia Fajerwerg, K. Chakarova, L. Delannoy, C. Louis, K. Hadjiivanov

Two Au/TiO2 samples with different gold loadings (0.7 and 4.0 wt.% Au) were prepared by deposition-precipitation with urea and calcined at 673 K. TEM revealed gold particles of 3.2 and 3.9 nm for the 0.7 and 4.0 wt.% samples, respectively. The samples were subjected to different red-ox treatments…

Journal of Materials Science, 2007, 42 (10), pp.3299-3306. ⟨10.1007/s10853-006-0777-1⟩. ⟨hal-03663974⟩

  • Article dans une revue

Platinum-zeolite hybrid catalyst for the electrooxidation of formic acid

Lu Zhang, Juan V Perales-Rondón, Angélica Thomère, Juliette Blanchard, Carlos M Sánchez-Sánchez

Formic acid oxidation reaction (FAOR) was studied using different platinum-zeolites hybrid catalysts. The catalysts were prepared by addition of two different forms of the ZSM-5 zeolite (ZSM-5-H+ and ZSM-5-NH4+) to an ink containing Vulcan carbon support and Pt nanoparticles (NPs). TEM images…

Journal of Electroanalytical Chemistry, 2021, 896, pp.115491. ⟨10.1016/j.jelechem.2021.115491⟩. ⟨hal-03274842v2⟩