Mathieu Frégnaux

Halochromic modulation of amorphous calcium carbonate crystallization driven by pH-responsive bioinspired pigments

Vaskar Sardhalia, Claudio dos Reis Ferreira, Guillaume Laurent, Mohamed Selmane et autres

Abstract Colors in biominerals often arise from the occlusion of low-molecular-weight organic pigments within calcium carbonate (CaCO 3 ) mineral phases during biomineralization processes; however, the physicochemical origin of these colors has been overlooked. Here, inspired by the growth of colored sea …

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Halochromic modulation of amorphous calcium carbonate crystallization driven by pH-responsive bioinspired organic pigments

Vaskar Sardhalia, Claudio dos Reis Ferreira, Guillaume Laurent, Mohamed Selmane et autres

Colors in biominerals often arise from the occlusion of low-molecular-weight organic pigments within calcium carbonate (CaCO3) mineral phases during biomineralization processes; however, the physicochemical origin of these colors has been overlooked. Here, inspired by the growth of colored sea urchin spines that …

fr, lb, us, de, cn, il (code pays fourni par la source)

Halochromic modulation of amorphous calcium carbonate crystallization driven by pH-responsive bioinspired organic pigments

Vaskar Sardhalia, Claudio dos Reis Ferreira, Guillaume Laurent, Mohamed Selmane et autres

Colors in biominerals often arise from the occlusion of low-molecular-weight organic pigments within calcium carbonate (CaCO3) mineral phases during biomineralization processes; however, the physicochemical origin of these colors has been overlooked. Here, inspired by the growth of colored sea urchin spines that …

fr, lb, us, de, cn, il (code pays fourni par la source)

Ultrafast wear of boron-doped diamond electrodes induced by pulsed bipolar activation

Sirine Ben Khemis, Christian Njel, Mathieu Frégnaux, Arnaud Etcheberry et autres

Boron-doped diamond (BDD) electrodes are renowned for their exceptional stability. However, we reveal here for the first time an unexpectedly rapid wear of BDD occurring while applying bipolar pulsed activation, even under moderate conditions (0.1 M Na₂SO₄, current densities ≤ ±50 mA·cm …

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Fe/N/C Catalyst Production by Collinear CO2 Laser Pyrolysis: Toward a Specific Mass-Weighted Energy-Deposited (J.g−1) Parameter Opening Discussion on FeNx Site Formation

Henri Perez, Claire Dazon, Pierre Lonchambon, Suzy Surblé et autres

We report the synthesis of Fe/N/C ORR electrocatalysts by an original collinear CO2 laser pyrolysis of liquid aerosol droplets in various configurations and compared them to a catalyst synthesized in the classical perpendicular one. While the precursors were always injected at the …

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Effect of various buffer layers for the large-scale atomic layer deposition integration of archetypical SrTiO3 thin film on silicon substrate

Bruno Berini, Razvan Burcea, Maxime Vallet, Arnaud Fouchet et autres

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Mitigation of Defect Formation at the NiO x /Perovskite Interface in p-i-n Perovskite Solar Cells

Javid Hajhemati, Nitin Mallik, Vincent Dufoulon, Mathieu Frégnaux et autres

Nickel oxide (NiO x ) is widely utilized as an inorganic hole transport layer (HTL) in inverted metal halide perovskite (MHP) solar cells due to its high bandgap, transparency, stability, and scalability. However, its high surface reactivity and the presence of interfacial …

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High‐Performance Capacitive Sensor Based on Polyphosphazene‐Modified InP Electrodes for Hydroquinone Detection

Siwar Jebril, Gianluca Visagli, Muriel Bouttemy, Mathieu Frégnaux et autres

Abstract A high‐performance capacitive sensor is presented for the determination of hydroquinone (HQ) based on n‐type indium phosphide (n‐InP) electrodes with an electrochemically deposited polyphosphazene (PPP) coating. The integration of PPP with InP electrodes offers a previously unexplored approach to chemical sensing. …

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Structural, properties and compositional modifications in non-stoichiometric Ni-substituted cobalt ferrites

Hacen Boussafel, C. Sedrati, S. Alleg, Mathieu Frégnaux et autres

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Effect of oxygen content on p-type electrical conductivity in β-Ga2O3 films

Se-Rim Park, Zeyu Chi, Corinne Sartel, Sang‐Mo Koo et autres

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Photophysics of cu-loaded MIL-125(Ti)-NH₂: Unravelling the role of cu oxidation states through time-resolved spectroscopy and density functional theory

Aneek Kuila, Khaled Dassouki, Valentín Diez‐Cabanes, Dorit Grinberg et autres

il, fr (code pays fourni par la source)

Ethylene sulfite and vinylene carbonate additives in acetonitrile-containing electrolytes for lithium-ion batteries: SEI impedance and XPS investigation

Sylvie Grugeon, Baptiste Salomez, Christian Krause, Mathieu Frégnaux et autres

Electrolyte solvents play a crucial role in extending the operating temperature range of Li-ion batteries. This article emphasizes the importance of precise adjustment of the amount of vinylene carbonate (VC) additive when incorporated with ethylene sulfite (ES) into a 20 vol% acetonitrile-containing …

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