L. Bouffier, S. Reculusa, V. Ravaine, A. Kuhn.


ChemPhysChem 2017, DOI: 10.1002/cphc.201700398.

 

A new simple and versatile method for the preparation of surface wetting gradients is proposed. It is based on the combination of electrode surface structuration introduced by a sacrificial template approach and the formation of a tuneable molecular gradient by bipolar electrochemistry. The gradient involves the formation of a self-assembled monolayer on gold surface by selecting an appropriate thiol molecule and the subsequent reductive desorption by means of bipolar electrochemistry. Under these conditions, the completion of the reductive desorption process evolves along the bipolar surface with a maximum strength localized at the cathodic edge and a decreasing driving force toward the middle of the surface. The remaining quantity of surface-immobilized thiol does therefore vary in function of the axial position, resulting in the formation of a molecular gradient. The surface of the bipolar electrode is characterized at each step of the modification by recording heterogeneous electron transfer. Also, the evolution of static contact angles measured with a water droplet deposited on the surface directly reveals the presence of the wetting gradient which can be modulated by changing the properties of the thiol. This is exemplified with a long hydrophobic alkane-thiol and a short hydrophilic mercaptan.

 

2017 12

Coupling electrochemistry with in situ fluorescence (confocal) microscopy
lundi 17 juillet 2017
L. Bouffier, T. Doneux.  Current Opinion in Electrochemistry, DOI: 10.1016/j.coelec.2017.06.015. Electrochemistry and fluorescence microscopy are two complementary transduction techniques that... Read More...
Tracking nano-electrochemistry using individual plasmonic nanocavities
jeudi 13 juillet 2017
G. Di Martino,V. A. Turek,  A. Lombardi, I.  Szabó, B. de Nijs,  A. Kuhn, E. Rosta, J.J. Baumberg Nano Lett. 2017 in press, doi:... Read More...
2D Electrochemiluminescence: Light Emission Confined at the Oil/Water Interface in Emulsions Stabilized by Luminophore-Grafted Microgels
mardi 4 juillet 2017
Rémy Bois, Sabina Scarabino, Valérie Ravaine, Neso Sojic Langmuir, 2017, DOI: 10.1021/acs.langmuir.7b01585 We describe a method to confine electrochemiluminescence (ECL) at the oil-water interface... Read More...
Scanning Electrochemical Microscopy for BESs Characterization
lundi 3 juillet 2017
D. Zigah, O. Fontaine World Scientific, 2017, ISBN: 978-1-78634-353-6   Bioelectrochemical Systems (BESs) are innovative and sustainable devices. They combine biological and electrochemical... Read More...
Biredox Ionic Liquids: New Opportunities Toward High Performances Supercapacitors
lundi 3 juillet 2017
C. Bodin,  E. Mourad,  D. Zigah,  S. Le Vot,  S. A Freunberger,  F. Favier, O. Fontaine Faraday Discuss., 2017,DOI: 10.1039/C7FD00174F   Nowadays,... Read More...
Anisotropic Metal Deposition on TiO2 Particles by Electric Field Induced Charge Separation
samedi 17 juin 2017
S. Tiewcharoen, C. Warakulwit, V. Lapeyre, P. Garrigue, L. Fourier, C. Elissalde, S. Buffière, P. Legros, M. Gayot, J. Limtrakul, A. Kuhn Angew.Chem.Int.Ed. (2017) HOT PAPER in press, DOI:... Read More...
Plasmonic response and SERS modulation in electrochemical applied potentials
dimanche 11 juin 2017
G. Di Martino, V. A. Turek,  C. Tserkezis, A. Lombardi, A. Kuhn, J.J. Baumberg Faraday Discuss., 2017, in press,doi 10.1039/C7FD00130D We study the optical response of individual nm-wide... Read More...
On-chip enzymatic microbiofuel cell-powered integrated circuits
dimanche 11 juin 2017
A. G. Mark, E. Suraniti, J. Roche, H. Richter, A. Kuhn, N. Mano, P. Fischer Lab Chip, 2017, 17, 1761 HOT PAPER A variety of diagnostic and therapeutic medical technologies rely on long term... Read More...
Bipolar Electrochemistry with Organic Single Crystals for Wireless Synthesis of Metal-Organic Janus Objects and Asymmetric Photovoltage Generation
mercredi 31 mai 2017
I. Malytska, C. Mézière, M. Keilar, L. Hirsch, G. Wantz, N. Avarvari, A. Kuhn, L. Bouffier. Journal of Physical Chemistry C 2017, DOI: 10.1021/acs.jpcc.7b02678.   Bipolar... Read More...
Modulation of Wetting Gradients by Tuning the Interplay between Surface Structuration and Anisotropic Molecular Layers with Bipolar Electrochemistry
mercredi 31 mai 2017
L. Bouffier, S. Reculusa, V. Ravaine, A. Kuhn. ChemPhysChem 2017, DOI: 10.1002/cphc.201700398.   A new simple and versatile method for the preparation of surface wetting gradients is proposed....
Oil-in-microgel strategy for enzymatic-triggered release of hydrophobic drugs
lundi 22 mai 2017
C.A. Busatto, H. Labie, V. Lapeyre, R. Auzely-Velty, A. Perro, N. Casis, J. Luna, D.A. Estenoz, V. Ravaine Journal of Colloid and Interface Science, 493, 2017, 356–364. Polymer microgels have... Read More...
Capillary-assisted bipolar electrochemistry: a focused minireview
vendredi 19 mai 2017
L. Bouffier, N. Sojic, A. Kuhn Electrophoresis, 2017, in press A bipolar electrode is quite unconventional as it behaves simultaneously as an anode and a cathode in contrast to a classic... Read More...
Hierarchical templating in deposition of semi-covalently imprinted inverse opal polythiophene film for femtomolar determination of human serum albumin
vendredi 19 mai 2017
M. Dabrowski, M. Cieplaka, P. Sindhu Sharma, P. Borowicz, K. Noworyta, W. Lisowski, F. D'Souza, A. Kuhn, W. Kutner Biosens.&Bioelectron. 2017, 94, 155-161 Nanostructured artificial receptor... Read More...
Spatially-resolved multicolor bipolar electrochemiluminescence
vendredi 19 mai 2017
Haidong Li, Laurent Bouffier, Stéphane Arbault, Alexander Kuhn, Conor F. Hogan, Neso SojicElectrochemistry Communications, 2017, in pressHere, we describe a new aspect of multicolor... Read More...
Co(III) Complexes of (1,3-Selen-2-yl)hydrazones and Their Sulphur Analogues: Comparative Structural, Electrochemical, Computational and Biological Activity Study
vendredi 19 mai 2017
Nenad R. Filipovic, Hana Elshaflu, Sonja Grubic, Ljiljana S. Jovanovic, Marko Rodic, Irena Novakovic, Aleksandar Malecevic, Ivana S. Djordjevic, Haidong Li, Neso Sojic, Aleksandar Marinkovic, Tamara... Read More...
Efficient Annihilation Electrochemiluminescence of Cationic Helicene Luminophores
vendredi 19 mai 2017
Haidong Li, Silvia Voci, Antoine Wallabregue, Catherine Adam, Geraldine M. Labrador, Romain Duwald, Irene Hernández Delgado, Simon Pascal, Johann... Read More...
Applications of Electrogenerated Chemiluminescence in Analytical Chemistry
vendredi 19 mai 2017
N. Sojic, S. Arbault, L. Bouffier, A. KuhnLuminescence in Electrochemistry. Applications in Analytical Chemistry, Physics and Biology. Eds. F. Miomandre, P. Audebert, 2017. Springer.The great success... Read More...
Recent Advances in Bipolar Electrochemistry
vendredi 19 mai 2017
L. Bouffier, D. Zigah, N. Sojic, A. Kuhn Electroanalytical Chemistry: A Series of Advances, Volume 27, eds. A.J. Bard, C.G. Zoski, 2017, CRC Press, Taylor&Francis Group, April 24, 2017, ISBN... Read More...
Low-Molecular-Weight Hydrogels as New Supramolecular Materials for Bioelectrochemical Interfaces
vendredi 19 mai 2017
D. Jain, A. Karajic, M. Murawska, B. Goudeau, S. Bichon, S. Gounel, N. Mano, A. Kuhn, P. Barthélémy ACS Appl. Mater. Interfaces, 2017, 9, 1093–1098 Controlling the interface between... Read More...
Miniaturized Electrochemical Device from Assembled Cylindrical Macroporous Gold Electrodes
vendredi 19 mai 2017
A. Karajic, S. Reculusa, S. Ravaine, N. Mano, A. Kuhn ChemElectroChem 2016, 3, 2031 – 2035 To design original electrochemical devices, self-assembly and growth processes can be... Read More...
Full-Spectral Multiplexing of Bioluminescence Resonance Energy Transfer in Three TRPV Channels
vendredi 19 mai 2017
H. J. Ruigrok, G. Shahid, B. Goudeau, F. Poulletier de Gannes,E. Poque-Haro, A. Hurtier, I. Lagroye, P. Vacher, S. Arbault, N. Sojic, B. Veyret, Y. Percherancier Biophysical Journal, 2017, 112,... Read More...