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Papers by Claude Chevrot

Research paper thumbnail of P and n dopable semi-interpenetrating polymer networks

Journal of Solid State Electrochemistry, Dec 1, 2006

Research paper thumbnail of Understanding the colorimetric properties of quinoxaline-based pi-conjugated copolymers by tuning their acceptor strength: a joint theoretical and experimental approach

RSC Adv., 2017

We report the synthesis and characterization of donor–acceptor π-conjugated copolymers leading to... more We report the synthesis and characterization of donor–acceptor π-conjugated copolymers leading to blue-to-green coloration according to acceptor strength.

Research paper thumbnail of Physical Characterization and Electrical Transport in End-Group Functionalized Self-Assembled Monolayers

MRS Proceedings, 1997

We have previously demonstrated that a self-assembled monolayer (SAM) of alkyltrichlorosilane mol... more We have previously demonstrated that a self-assembled monolayer (SAM) of alkyltrichlorosilane molecules, covalently bonded to the native oxide of a silicon substrate, allows the fabrication of MIS (Metal-Insulator-Semiconductor) devices with excellent electrical properties [1]. Here we demonstrate that we can functionalize, with π-electron moieties, the end-groups of the molecules, once grafted to the substrate, without disturbing the low conductivity through the SAM (σ⊥), while strongly increasing the in-plane conductivity (σ//). The functionalization of the monolayer is monitored by FTIR, ellipsometry and X ray reflectivity. Conductivity, photoconductivity and capacitance measurements are carried out to study the effect of these chemical functionalizations on the electrical properties of the monolayers. We demonstrate that the low perpendicular conductivity (σ⊥≈10−15 S/cm) is not altered by the end-group functionalities while high anisotropic conductivities (σ///σ⊥ ≈ 107-108) are ...

Research paper thumbnail of Tuning the Neutral State Color of Blue, Cyan and Green PI-Conjugated Copolymers By Jointly Playing the Acceptor Strength and the Steric Hindrance

ECS Meeting Abstracts, 2015

Research paper thumbnail of Organisation et propriétés électroniques de monocouches d'alkylsiloxanes fonctionnalisées par des groupements conjugués

Research paper thumbnail of Thermal regulation of satellites using adaptive polymeric materials

Solar Energy Materials and Solar Cells, 2019

Research paper thumbnail of Method of preparing a composite material, resulting material and its uses

Research paper thumbnail of Investigation of solid hybrid solar cells based on molecular glasses

Proceedings of the Estonian Academy of Sciences. Engineering, 2006

Research paper thumbnail of Dry Etching Process on a Conducting Interpenetrating Polymer Network Actuator for a Flapping Fly Micro Robot

Volume 2: Biomedical and Biotechnology Engineering; Nanoengineering for Medicine and Biology, 2011

In this paper we report on conducting polymer micro-actuators which have been fully patterned usi... more In this paper we report on conducting polymer micro-actuators which have been fully patterned using photolithography and plasma dry etching processes. The interpenetrating polymer network (IPN) architecture used in this work resolves interface and adhesion problems which have been reported for traditional conducting polymer-based actuators. Actuator films 17 μm thick can be obtained and then patterned using microfabrication technologies. IPN-actuators were etched to obtain 2*5mm2 beams operating in air. These micro-sized actuators are potential candidates in numerous low frequency applications, including micro-valves, micro-optical instrumentation and micro-robotics. Moreover, due to the rapid response of our IPN architecture, this material has been considered as the main actuator for the flapping wings of an artificial insect.

Research paper thumbnail of Characterization and properties of the charge transfer complex of carbazole derivatives

Research paper thumbnail of Active Thermal Control of Satellites with Electroactive Materials

Research paper thumbnail of Thermal ageing of poly (ethylene oxide)/poly (3, 4-ethylenedioxythiophene) semi-IPNs

European Polymer …, 2008

The thermal stability study of a conducting semi-IPN has been reported. The thermo-oxidation of p... more The thermal stability study of a conducting semi-IPN has been reported. The thermo-oxidation of poly (ethylene oxide)(PEO)/poly (3, 4-ethylenedioxythiophene)(PEDOT) semi-Interpenetrating Polymer Network (semi-IPN) was studied at 80° C in open air. The ...

Research paper thumbnail of Self-supported semi-interpenetrating polymer networks for new design of electrochromic devices

Electrochimica Acta, 2008

This paper reports the preparation of conducting films combining linear poly (3, 4-ethylenedioxyt... more This paper reports the preparation of conducting films combining linear poly (3, 4-ethylenedioxythiophene)(PEDOT) and cross-linked polyethylene oxide (PEO) into semi-interpenetrating networks. Due to the synthetic pathway, PEDOT is distributed within the ...

Research paper thumbnail of Undoped thin films of polyparaphenylene, poly-(N-alkylcarbazole) and their copolymers obtained by electrocoating

AIP Conference Proceedings

ABSTRACT

Research paper thumbnail of Electropolymerization of hydrogen bond supramolecular associations between terthiophene-3-acetic acid and 4,4′-bipyridine

Research paper thumbnail of Charging/discharging kinetics of poly(3,4-ethylenedioxythiophene) in 1-ethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide ionic liquid under galvanostatic conditions

Electrochimica Acta, Aug 1, 2005

Research paper thumbnail of Dry etching process based on conducting interpenetrating polymer network actuator for a flapping fly micro robot

Research paper thumbnail of 2013 SM JPCC Sini Processable Star-Shaped Molecules with Triphenylamine Core as Hole-Transporting Materials Experimental and Theoretical Approach

Research paper thumbnail of Actuators based on conducting poly(3,4-ethylenedioxythiophene)/PEO semi-IPN

Spie Proceedings Series, 2002

A new approach is proposed, namely the use of Interpenetrating Polymer Networks (IPNs) in order t... more A new approach is proposed, namely the use of Interpenetrating Polymer Networks (IPNs) in order to solve the interface and adhesion problems in the design of classical conducting polymer based actuators. Semi IPN type materials are synthesized between poly(3,4-ethylenedioxythiophene) and a poly(ethyleneoxide) based network as the ionic conducting partner. The synthetic pathway which will be presented ensures a gradual dispersion

Research paper thumbnail of Method for Preparing a Composite, Composite Thus Obtained and Uses Thereof

Research paper thumbnail of P and n dopable semi-interpenetrating polymer networks

Journal of Solid State Electrochemistry, Dec 1, 2006

Research paper thumbnail of Understanding the colorimetric properties of quinoxaline-based pi-conjugated copolymers by tuning their acceptor strength: a joint theoretical and experimental approach

RSC Adv., 2017

We report the synthesis and characterization of donor–acceptor π-conjugated copolymers leading to... more We report the synthesis and characterization of donor–acceptor π-conjugated copolymers leading to blue-to-green coloration according to acceptor strength.

Research paper thumbnail of Physical Characterization and Electrical Transport in End-Group Functionalized Self-Assembled Monolayers

MRS Proceedings, 1997

We have previously demonstrated that a self-assembled monolayer (SAM) of alkyltrichlorosilane mol... more We have previously demonstrated that a self-assembled monolayer (SAM) of alkyltrichlorosilane molecules, covalently bonded to the native oxide of a silicon substrate, allows the fabrication of MIS (Metal-Insulator-Semiconductor) devices with excellent electrical properties [1]. Here we demonstrate that we can functionalize, with π-electron moieties, the end-groups of the molecules, once grafted to the substrate, without disturbing the low conductivity through the SAM (σ⊥), while strongly increasing the in-plane conductivity (σ//). The functionalization of the monolayer is monitored by FTIR, ellipsometry and X ray reflectivity. Conductivity, photoconductivity and capacitance measurements are carried out to study the effect of these chemical functionalizations on the electrical properties of the monolayers. We demonstrate that the low perpendicular conductivity (σ⊥≈10−15 S/cm) is not altered by the end-group functionalities while high anisotropic conductivities (σ///σ⊥ ≈ 107-108) are ...

Research paper thumbnail of Tuning the Neutral State Color of Blue, Cyan and Green PI-Conjugated Copolymers By Jointly Playing the Acceptor Strength and the Steric Hindrance

ECS Meeting Abstracts, 2015

Research paper thumbnail of Organisation et propriétés électroniques de monocouches d'alkylsiloxanes fonctionnalisées par des groupements conjugués

Research paper thumbnail of Thermal regulation of satellites using adaptive polymeric materials

Solar Energy Materials and Solar Cells, 2019

Research paper thumbnail of Method of preparing a composite material, resulting material and its uses

Research paper thumbnail of Investigation of solid hybrid solar cells based on molecular glasses

Proceedings of the Estonian Academy of Sciences. Engineering, 2006

Research paper thumbnail of Dry Etching Process on a Conducting Interpenetrating Polymer Network Actuator for a Flapping Fly Micro Robot

Volume 2: Biomedical and Biotechnology Engineering; Nanoengineering for Medicine and Biology, 2011

In this paper we report on conducting polymer micro-actuators which have been fully patterned usi... more In this paper we report on conducting polymer micro-actuators which have been fully patterned using photolithography and plasma dry etching processes. The interpenetrating polymer network (IPN) architecture used in this work resolves interface and adhesion problems which have been reported for traditional conducting polymer-based actuators. Actuator films 17 μm thick can be obtained and then patterned using microfabrication technologies. IPN-actuators were etched to obtain 2*5mm2 beams operating in air. These micro-sized actuators are potential candidates in numerous low frequency applications, including micro-valves, micro-optical instrumentation and micro-robotics. Moreover, due to the rapid response of our IPN architecture, this material has been considered as the main actuator for the flapping wings of an artificial insect.

Research paper thumbnail of Characterization and properties of the charge transfer complex of carbazole derivatives

Research paper thumbnail of Active Thermal Control of Satellites with Electroactive Materials

Research paper thumbnail of Thermal ageing of poly (ethylene oxide)/poly (3, 4-ethylenedioxythiophene) semi-IPNs

European Polymer …, 2008

The thermal stability study of a conducting semi-IPN has been reported. The thermo-oxidation of p... more The thermal stability study of a conducting semi-IPN has been reported. The thermo-oxidation of poly (ethylene oxide)(PEO)/poly (3, 4-ethylenedioxythiophene)(PEDOT) semi-Interpenetrating Polymer Network (semi-IPN) was studied at 80° C in open air. The ...

Research paper thumbnail of Self-supported semi-interpenetrating polymer networks for new design of electrochromic devices

Electrochimica Acta, 2008

This paper reports the preparation of conducting films combining linear poly (3, 4-ethylenedioxyt... more This paper reports the preparation of conducting films combining linear poly (3, 4-ethylenedioxythiophene)(PEDOT) and cross-linked polyethylene oxide (PEO) into semi-interpenetrating networks. Due to the synthetic pathway, PEDOT is distributed within the ...

Research paper thumbnail of Undoped thin films of polyparaphenylene, poly-(N-alkylcarbazole) and their copolymers obtained by electrocoating

AIP Conference Proceedings

ABSTRACT

Research paper thumbnail of Electropolymerization of hydrogen bond supramolecular associations between terthiophene-3-acetic acid and 4,4′-bipyridine

Research paper thumbnail of Charging/discharging kinetics of poly(3,4-ethylenedioxythiophene) in 1-ethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide ionic liquid under galvanostatic conditions

Electrochimica Acta, Aug 1, 2005

Research paper thumbnail of Dry etching process based on conducting interpenetrating polymer network actuator for a flapping fly micro robot

Research paper thumbnail of 2013 SM JPCC Sini Processable Star-Shaped Molecules with Triphenylamine Core as Hole-Transporting Materials Experimental and Theoretical Approach

Research paper thumbnail of Actuators based on conducting poly(3,4-ethylenedioxythiophene)/PEO semi-IPN

Spie Proceedings Series, 2002

A new approach is proposed, namely the use of Interpenetrating Polymer Networks (IPNs) in order t... more A new approach is proposed, namely the use of Interpenetrating Polymer Networks (IPNs) in order to solve the interface and adhesion problems in the design of classical conducting polymer based actuators. Semi IPN type materials are synthesized between poly(3,4-ethylenedioxythiophene) and a poly(ethyleneoxide) based network as the ionic conducting partner. The synthetic pathway which will be presented ensures a gradual dispersion

Research paper thumbnail of Method for Preparing a Composite, Composite Thus Obtained and Uses Thereof

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