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C. Adam, F. Kanoufi, N. Sojic and M. Etienne.

Electrochim. Acta, 2015, in press.

Shearforce detection was applied to the controlled positioning of nanotip arrays at air/solid and liquid/solid interfaces in scanning electrochemical microscopy (SECM). The arrays were fabricated by wet chemical etching of ordered optical fiber bundles. The shearforce detection have been performed with a non-optical detection setup between 70 and 170 kHz. The hydrodynamic nature of the shearforce interaction led to approach curves with length varying from few μm to more than 80 μm, essentially controlled by the working frequency (resonance frequency), the nature of the medium (air, water, electrophoretic paint solution) and the surface state of the fiber bundle (cleaved or etched). This interface sensitive signal was applied to the positioning of the nanotip array in a 1 μm PDMS film before the electrophoretic deposition of an insulating paint. The resulting nanoprobe electrode array, displaying nanotip electrodes individually insulated, has been characterized by cyclic voltammetry and SECM feedback curves. These results are discussed versus numerical simulations. They demonstrate that, except when in vicinity of a conductive substrate that may reveal the nanotip structure, the electrochemical behavior of the nanotip array is dictated by its micrometer dimension (the fiber bundle). In turn, they confirm the potential of shearforce detection for precise control over the array positioning.

 2015-05

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Monday, 25 July 2016
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Wall slip across the jamming transition of soft thermoresponsive particles
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Differential Photoluminescent and Electrochemiluminescent Behavior for Resonance Energy Transfer Processes in Thermoresponsive Microgels
Monday, 25 July 2016
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One-Step Preparation of Bifunctionalized Surfaces by Bipolar Electrografting
Wednesday, 30 December 2015
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Thursday, 05 November 2015
C. Adam, A. Wallabregue, H. Li, J. Gouin, R. Vanel, S. Grass, J. Bosson, L. Bouffier, J. Lacour and N. Sojic. Chem. Eur. J., 2015, 21, 19243-19249. Trianguleniums are fascinating conjugated...
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Thursday, 05 November 2015
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Friday, 25 September 2015
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M. Valetaud, G. Loget, J. Roche, N. Hüsken, Z. Fattah, V. Badets, O. Fontaine, D. Zigah. J. Chem. Educ., 2015, 92 (10), pp 1700–1704. The Electrochemical Pen (EChemPen) was developed as an...
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Bipolar Electrografting on the Inner Wall of Carbon Nanotubes
Wednesday, 23 September 2015
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Monday, 07 September 2015
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Friday, 24 July 2015
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Friday, 24 July 2015
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3D electrogenerated chemiluminescence: from surface-confined reactions to bulk emission
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Synthesis of conducting asymmetric hydrogel particles showing autonomous motion
Thursday, 28 May 2015
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Shearforce Positioning of Nanoprobe Electrode Arrays for Scanning Electrochemical Microscopy Experiments
Tuesday, 12 May 2015
C. Adam, F. Kanoufi, N. Sojic and M. Etienne. Electrochim. Acta, 2015, in press. Shearforce detection was applied to the controlled positioning of nanotip arrays at air/solid and liquid/solid...
Generation of Metal Composition Gradients by Means of Bipolar Electrodeposition
Wednesday, 18 March 2015
G. Tisserant, Z. Fattah, C. Ayela, J. Roche, B. Plano, D. Zigah, B. Goudeau, A. Kuhn and L. Bouffier.  Electrochim. Acta, 2015, 179, 276-281. Bipolar electrochemistry is an unconventional...
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