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 asymmetric way or by a wireless self-regeneration mechanism due to the intrinsic symmetry breaking of this concept. Here a complementary approach is explored on the basis of conducting polymer objects addressed in solution by an electric field. The presence of the latter results in a differential polarization of the polymer, thus enabling its oxidation at one extremity and its reduction at the opposite side. This triggers different degrees of swelling and shrinking, leading to important deformations of the object. Combined with an additional asymmetry in the polymer surface morphology, a periodic switching of the electric field orientation allows exploiting these deformations to induce directed crawling motion. This first example of a wireless biomimetic crawler based on conducting polymers opens interesting long-term perspectives in several areas such as for example wireless valves, pumps and (micro)robotics.

2017 25

Preparation of Template-Free Robust Yolk–Shell Gelled Particles from Controllably Evolved All-in-Water Emulsions
Friday, 05 October 2018
J.-P. Douliez, A. Perro, J.-P. Chapel, B. Goudeau and L. Béven Small 2018, 1803042 A template-free all-aqueous bulk preparation of robust hollow capsules having a gelatin shell from all-in-water...
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Highly ordered macroporous poly-3,4-ortho-xylendioxythiophene electrodes as a sensitive analytical tool for heavy metal quantification
Tuesday, 02 October 2018
G. Salinas, B. A. Frontana-Uribe, S. Reculusa, P. Garrigue, A. Kuhn Anal.Chem. 2018, in press, DOI: 10.1021/acs.analchem.8b03779 Highly ordered macroporous electrodes of the conducting polymer...
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Optimal thickness of a porous micro‐electrode operating a single redox reaction
Tuesday, 02 October 2018
T. D. Le, L. Zhang, S. Reculusa, G.Vignoles, N. Mano, A. Kuhn, D. Lasseux ChemElectroChem 2018, in press, doi.org/10.1002/celc.201800972 This article reports on a procedure to predict the optimal...
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A snapshot of the electrochemical reaction layer by using 3 dimensionally resolved fluorescence mapping
Friday, 14 September 2018
A. de Poulpiquet, B. Goudeau, P. Garrigue, N. Sojic, S. Arbault, T. Doneux, L. Bouffier. Chem. Sci. 2018, 9, 6622-6628. The coupling between electrochemistry and fluorescence confocal laser scanning...
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Eosin-Mediated Alkylsulfonyl Cyanation of Olefins
Friday, 14 September 2018
V. Pirenne, G. Kurtay, S. Voci, L. Bouffier, N. Sojic, F. Robert, D. M. Bassani, Y. Landais. Org. Lett. 2018, 20 (15), 4521-4525. Eosin-Y (EY)-mediated alkylsulfonyl cyanation of olefins was shown...
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C‐Functionalized Cationic Diazaoxatriangulenes: Late‐Stage Synthesis and Tuning of Physicochemical Properties
Friday, 14 September 2018
I. Hernández Delgado, S. Pascal, C. Besnard, S. Voci, L. Bouffier, N. Sojic, J. Lacour. Chem. Eur. J. 2018, 24 (40), 10186-10195. A series of nine C‐functionalized cationic diazaoxa triangulene...
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Uphill production of dihydrogen by enzymatic oxidation of glucose without an external energy source
Monday, 13 August 2018
E. Suraniti, P. Merzeau, J. Roche, S. Gounel, A. G. Mark, P. Fischer, N. Mano, A. Kuhn Nature Comm. 2018, 9:3229 see also CNRS press release Chemical systems do not allow the coupling of energy from...
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Electrically Controlled Nano and Micro Actuation in Memristive Switching Device with On-Chip Gas Encapsulation
Monday, 09 July 2018
D. Kos, H. P. A. G. Astier, G. D. Martino, J. Mertens, H. Ohadi, D. De. Fazio, D. Yoon, Z. Zhao, A. Kuhn, A. C. Ferrari, C. J. B. Ford, J. J. Baumberg Small, 2018, in press,...
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TRPV1 activation induced by modulated or unmodulated 1800 MHz radiofrequency field exposure
Monday, 18 June 2018
Ruigrok, H.J., Arnaud-Cormos D., Hurtier A., Poque-Haro E., Poulletier de Gannes F., Ruffié G., Bonnaudin F, Lagroye I., Sojic N., Arbault S., Lévêque P., Veyret B. and Percherancier Y. Radiation...
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Correlations between gaseous and liquid phase chemistries induced by cold atmospheric plasmas in a physiological buffer
Monday, 18 June 2018
Girard F., Peret M., Dumont N., Badets V., Blanc S., Gazeli K., Noël C., Belmonte T., Marlin L., Cambus J.P., Simon G., Sojic N., Held B., Clément F. and Arbault S. Phys. Chem. Chem. Phys., 2018,...
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Electroformation of Phospholipid Giant Unilamellar Vesicles in a Physiological Buffer
Monday, 18 June 2018
Lefrançois P., Goudeau B., Arbault S. Integrative Biology, 2018, in press Phospholipid Giant Unilamellar Vesicles (GUVs) are usually prepared by electroformation in water, that is in a...
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Des biopiles enzymatiques pour alimenter des circuits électroniques implantables
Tuesday, 10 April 2018
E. Suraniti, A.G. Mark, J. Roche, H. Richter, A. Kuhn, P. Fischer, N. Mano L’Actualité Chimique 2018, 427-428,127-128 Une micro-source d’énergie intégrée permettrait à des implants...
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Current hot-spots and some more exotic topics
Tuesday, 10 April 2018
L. Bouffier, N. Sojic, A. Kuhn. Current Opinion in Electrochemistry 2018, 7:A1–A4 This section of Current Opinion in Electrochemistry includes 17 articles contributed by groups from all over the...
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Une façon inhabituelle de briser la symétrie moléculaire: les métaux mesoporeux chiraux
Thursday, 22 February 2018
A. Kuhn L’Actualité Chimique 2018, 426,19-24 L’analyse et la synthèse des composés chiraux est d’une importance cruciale dans de nombreux domaines de la société et de la science, y...
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Gateway state-mediated, long-range tunnelling in molecular wires
Thursday, 01 February 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, 10,...
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Tuning Electrochemiluminescence in Multi-Stimuli Responsive Hydrogel Films
Monday, 08 January 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...
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Bipolar Conducting Polymer Crawlers Based on Triple Symmetry Breaking
Friday, 15 December 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...