Electrochemistry of Biosystems
Linking Glucose Oxidation to Luminol-based Electrochemiluminescence using bipolar Electrochemistry
Asymmetric Modification of TiO2 Nanofibers with Gold by Electric-Field-Assisted Photochemistry
Stimuli-responsive microgels for electrochemiluminescence amplification
Faraday Discussions, 2017, 10.1039/C7FD00174F
Nowadays, commercial supercapacitors are based on purely capacitive storage and porous carbons are used as electrodes. Unfortunately their energy density is limited, so that many study investigated new materials that could improve the capacitance of the device. This new type of electrodes (e.g. RuO2, MnO2…) involves different mechanisms for energy storage (energy stored at the solid state in the material). In this latter case, redox reactions (Faradaic), that are slower than adsorption process (capacitive), occurs, explaining why such devices are called pseudo-capacitors. This is a real breakthrough to their development since, using this approach, capacity improvement inevitably involves important loss of power. A contrary, at the liquid state, even if Faradaic, redox reactions occur faster due to favourable environment. To design new devices allowing liquid dynamics with improved specific capacitance is very challenging. In this context, this paper presents a new approach to increase the specific capacitance, based on biredox ionic liquids, where redox species are part of the electrolyte, in contrast with classical pseudocapacitors proposed up to now. Anions and cations are functionalized with anthraquinone (AQ) and 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) moieties, respectively. Glassy carbon, carbon-onion, and commercial activated carbon electrodes that exhibit different double layer structures and thus different diffusion process (dynamics) were used to study electrochemical response of biredox ionic liquids simultaneously at the positive and the negative electrodes.
 
2017 17

Gateway state-mediated, long-range tunnelling in molecular wires


jeudi 1 février 2018
S. Sangtarash,  A. Vezzoli,  H. Sadeghi, N. Ferri,  H. M. O'Brien,  I. Grace,  L. Bouffier, S. J. Higgins, R. J. Nichols, C. J. Lambert. Nanoscale 2018, DOI: 10.1039/C7NR07243K If the factors controlling the decay... Read More...

Tuning Electrochemiluminescence in Multi-Stimuli Responsive Hydrogel Films


lundi 8 janvier 2018
Haidong Li, Silvia Voci, Valérie Ravaine and Neso Sojic J. Phys. Chem. Lett., 2018, 9, 340–345 Luminescent and redox properties of stimuli-responsive hydrogel materials have been modulated by different external stimuli which trigger swelling or... Read More...

Bipolar Conducting Polymer Crawlers Based on Triple Symmetry Breaking


vendredi 15 décembre 2017
B. Gupta, B. Goudeau, P. Garrigue, A. Kuhn Adv. Funct. Mater. 2018, 1705825 see also video clip in Zeste de Science Bipolar electrochemistry can be used in different ways to induce motion of an object, for example by generating gas bubbles in an... Read More...

Communiqué de presse du CNRS - Des plastiques qui dansent


mercredi 11 octobre 2017
De nouveaux types d’actionneurs à base de polymères conducteurs ont été publiés dans la revue Angewandte Chemie et viennent de faire l'objet d'un communiqué de presse du CNRS. L’originalité de l'approche réside dans le déclenchement... Read More...

Communiqué de presse du CNRS - Semi-conducteurs Janus


lundi 24 juillet 2017
Dans le cadre d'une collaboration avec des scientifiques thaïlandais (centre VISTEC à Rayong et Kasetsart University à Bangkok), notre équipe vient de mettre au point un nouveau procédé permettant de synthétiser des particules "Janus"... Read More...