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Your search keyword '"Gabriel Boitel-Aullen"' showing total 6 results
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6 results on '"Gabriel Boitel-Aullen"'

1. PassStat, a simple but fast, precise and versatile open source potentiostat

Author

Mélicia Caux, Anis Achit, Kethsovann Var, Gabriel Boitel-Aullen, Daniel Rose, Agnès Aubouy, Sylvain Argentieri, Raymond Campagnolo, and Emmanuel Maisonhaute

Subjects
Potentiostat, Cyclic voltammetry, Square wave voltammetry, Ultramicroelectrodes, Open hardware, Analytical chemistry, Science (General), Q1-390
Abstract

This work presents 4 open source potentiostat solutions for performing accurate measurements in cyclic voltammetry and square wave voltammetry at a low price. A very simple and easy to reproduce analogic board (c.a. 10 €) was driven either by a Teensy card from the company PJRC under an Arduino/Python software solution (39 €) or by an Analog Discovery 2 device from Digilent (less than 300 €). A smartphone Bluetooth Android interface was also created to circumvent the use of a computer. We demonstrated that our scheme is suitable for measurements in classical electrochemical conditions but also to carry out experiments with ultramicroelectrodes. We could thus reach a noise resolution of less than 1 pA. Scan rates of 8000 Vs−1 with ohmic drop compensation were also achieved. The device is suitable for teaching purposes but also for experiments in a participative science context on the ground, or countries with lower financial possibilities.

Published
2022
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2. Silver-Based Plasmonic Nanoparticles for and Their Use in Biosensing

Author

Alexis Loiseau, Victoire Asila, Gabriel Boitel-Aullen, Mylan Lam, Michèle Salmain, and Souhir Boujday

Subjects
silver nanoparticles, synthesis, coating, alloy, core@shell, LSPR, biosensors, Biotechnology, TP248.13-248.65
Abstract

The localized surface plasmon resonance (LSPR) property of metallic nanoparticles is widely exploited for chemical and biological sensing. Selective biosensing of molecules using functionalized nanoparticles has become a major research interdisciplinary area between chemistry, biology and material science. Noble metals, especially gold (Au) and silver (Ag) nanoparticles, exhibit unique and tunable plasmonic properties; the control over these metal nanostructures size and shape allows manipulating their LSPR and their response to the local environment. In this review, we will focus on Ag-based nanoparticles, a metal that has probably played the most important role in the development of the latest plasmonic applications, owing to its unique properties. We will first browse the methods for AgNPs synthesis allowing for controlled size, uniformity and shape. Ag-based biosensing is often performed with coated particles; therefore, in a second part, we will explore various coating strategies (organics, polymers, and inorganics) and their influence on coated-AgNPs properties. The third part will be devoted to the combination of gold and silver for plasmonic biosensing, in particular the use of mixed Ag and AuNPs, i.e., AgAu alloys or Ag-Au core@shell nanoparticles will be outlined. In the last part, selected examples of Ag and AgAu-based plasmonic biosensors will be presented.

Published
2019
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4. Electron Transfer Inside a Decaferrocenylated Rotaxane Analyzed by Fast Scan Cyclic Voltammetry and Impedance Spectroscopy

Author

François Huet, Jean-François Nierengarten, Béatrice Delavaux-Nicot, Emmanuel Maisonhaute, Laure Fillaud, Gabriel Boitel-Aullen, Iwona Nierengarten, Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'innovation moléculaire et applications (LIMA), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université, CNRS, ANR-17-CE07-0012,FastGiant,Mécanismes de transferts d'électrons ultrarapides dans les polyrotaxanes géants(2017), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Self assembled monolayers, Cyclic voltammetry, Rotaxane, Materials science, Fast-scan cyclic voltammetry, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Redox, Catalysis, Electron transfer, chemistry.chemical_compound, Electrochemistry, [CHIM]Chemical Sciences, Impedance, Self-assembled monolayer, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Dielectric spectroscopy, Ferrocene, chemistry, Physical chemistry, 0210 nano-technology
Abstract

International audience; The electrochemical behavior of a giant rotaxane bearing 10 electroactive ferrocene centers has been analyzed by both fast scan cyclic voltammetry and impedance measurements. The measurements support the hypothesis that all redox centers are not equivalent and display different electron transfer rate constants, which would arise from several possible conformations of the adsorbed molecule. Effectively using such systems in molecular devices thus necessitates to minimize or at least control those dispersions.

Published
2021

5. PassStat, a simple but fast, precise and versatile open source potentiostat

Author

Mélicia Caux, Anis Achit, Kethsovann Var, Gabriel Boitel-Aullen, Daniel Rose, Agnès Aubouy, Sylvain Argentieri, Raymond Campagnolo, Emmanuel Maisonhaute, Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Pharmacochimie et Biologie pour le Développement (PHARMA-DEV), Institut de Recherche pour le Développement (IRD)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Institut des Systèmes Intelligents et de Robotique (ISIR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and ANR-17-CE07-0012,FastGiant,Mécanismes de transferts d'électrons ultrarapides dans les polyrotaxanes géants(2017)

Subjects
Potentiostat, open hardware, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Mechanical Engineering, ultramicroelectrodes, analytical chemistry, Biomedical Engineering, square wave voltammetry, Instrumentation, Industrial and Manufacturing Engineering, cyclic voltammetry, Civil and Structural Engineering
Abstract

International audience; This work presents 4 open source potentiostat solutions for performing accurate measurements in cyclic voltammetry and square wave voltammetry at a low price. A very simple and easy to reproduce analogic board (c.a. 10 €) was driven either by a Teensy card from the company PJRC under an Arduino/Python software solution (39 €) or by an Analog Discovery 2 device from Digilent (less than 300 €). A smartphone Bluetooth Android interface was also created to circumvent the use of a computer. We demonstrated that our scheme is suitable for measurements in classical electrochemical conditions but also to carry out experiments with ultramicroelectrodes. We could thus reach a noise resolution of less than 1 pA. Scan rates of 8000 Vs-1 with ohmic drop compensation were also achieved. The device is suitable for teaching purposes but also for experiments in a participative science context on the ground, or countries with lower financial possibilities.

Published
2021

6. Cover Feature: Electron Transfer Inside a Decaferrocenylated Rotaxane Analyzed by Fast Scan Cyclic Voltammetry and Impedance Spectroscopy (ChemElectroChem 18/2021)

Author

Jean-François Nierengarten, Laure Fillaud, Iwona Nierengarten, Emmanuel Maisonhaute, François Huet, Gabriel Boitel-Aullen, and Béatrice Delavaux-Nicot

Subjects
Electron transfer, Materials science, Rotaxane, Feature (computer vision), Electrochemistry, Analytical chemistry, Fast-scan cyclic voltammetry, Self-assembled monolayer, Cyclic voltammetry, Electrical impedance, Catalysis, Dielectric spectroscopy
Published
2021

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