
Administration Nationale: |
Administration Locale:- Membre d'un pool d'experts
- Direction d'équipe
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Curriculum Vitae: |
- Full Professor (2021-...) & Assistant Professor (2005-2021) at the University of Montpellier - Coordinator of the ANR project DARWIN (2020-2023) - Member of the Institut Universitaire de France (2015-2020) - Young Researcher grant of the ANR (Nanophoresis: 2014-2017) - Prize "Young research leader" of the LR Region (2013) - Accreditation to supervise research (HDR) (2012) - Individual Marie Curie Postdoctoral Fellowship of the European Commission: University of Cambridge (2004-2005) - PhD in Materials Science (supervisor: Patrick Bernier) (2000-2003) |
Activités de Recherche: |
In my group, we explore the properties of nanostructures and nanodevices with a special focus on carbon nanotubes. Our research interests lie at the frontier of physics and chemistry from nanostructure growth to nanofluidic properties. Our approach notably involves in-situ optical and electrical measurements to probe the fundamental processes governing, for instance, the chiral selectivity of nanotube growth, the optical spectrum or the ion transport properties of individual nanotubes, to cite a few. We are continuously seeking PhD and postdoc candidates, in particular with strong records in Physics, Materials Science, Chemistry or Engineering. Please contact me directly (vincent.jourdain@umontpellier.fr) about specific research opportunities. |
Domaines de Recherche: - Physique/Matière Condensée/Science des matériaux
- Chimie/ou physique
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HDR |
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De la croissance catalytique des nanotubes de carbone 
Auteur(s): Jourdain V.
(H.D.R.)
, 2012Texte intégral en Openaccess :
Ref HAL: tel-00773018_v1
Exporter : BibTex | endNote
Résumé: Ces travaux portent sur la croissance catalytique des nanotubes de carbone par la méthode dite de Catalytic Chemical Vapor Deposition. La première partie est consacrée à une revue de la compréhension actuelle de ce processus de croissance dans la littérature en particulier concernant les connaissances antérieures issues d'autres domaines de recherche, la relation synthèse-structure et les questions encore ouvertes. La deuxième partie est consacrée aux travaux du candidat pour répondre à ces questions et utilisant essentiellement la technique de spectroscopie Raman pour des mesures in situ et ex situ. Quatre aspects sont étudiés : l'activation des particules catalytiques, la densité de défauts des nanotubes, les cinétiques de croissance / désactivation et la distribution en diamètre des nanotubes.
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Dernieres productions scientifiques :

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Dynamic instability of individual carbon nanotube growth revealed by in situ homodyne polarization microscopy 
Auteur(s): Pimonov V., Tran H.-N., Monniello L., Tahir S., Michel T., Podor Renaud, Odorico Michaël, Bichara Christophe, Jourdain V.
(Article) Publié:
Nano Letters, vol. p. (2021)
Texte intégral en Openaccess : 
Ref HAL: hal-03362238_v1
Ref Arxiv: 2110.01226
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
Résumé: Understanding the kinetic selectivity of carbon nanotube growth at the scale of individual nanotubes is essential for the development of high chiral selectivity growth methods. Here we demonstrate that homodyne polarization microscopy can be used for high-throughput imaging of long individual carbon nanotubes under real growth conditions (at ambient pressure, on a substrate), and with sub-second time resolution. Our in situ observations on hundreds of individual nanotubes reveal that about half of them grow at a constant rate all along their lifetime while the other half exhibits stochastic changes in growth rates, and switches between growth, pause and shrinkage. Statistical analysis shows that the growth rate of a given nanotube essentially varies between two values, with similar average ratio (~1.7) regardless of whether the rate change is accompanied by a change in chirality. These switches indicate that the nanotube edge or the catalyst nanoparticle fluctuates between different configurations during growth.
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Ionic Conductance of Carbon Nanotubes: Confronting Literature Data with Nanofluidic Theory 
Auteur(s): Manghi Manoel, Palmeri J., Henn F., Noury A., Picaud Fabien, Herlem Guillaume, Jourdain V.
(Article) Publié:
The Journal Of Physical Chemistry C, vol. 125 p.22943-22950 (2021)
Texte intégral en Openaccess :
Ref HAL: hal-03360790_v1
DOI: 10.1021/acs.jpcc.1c08202
Exporter : BibTex | endNote
Résumé: The field of ion transport through carbon nanotubes (CNTs) is marked by a large variability of the ionic conductance values reported by different groups. There is also a large uncertainty concerning the relative contributions of channel and access resistances in the experimentally measured currents, both depending on experimental parameters (nanotube length and diameter). In this perspective article, we discuss the ionic conductance values reported so far in the case of 2 individual CNTs and compare them with standard nano-fluidic models considering both the access and channel resistances. With a view toward guiding experimentalists, we thus show in which conditions the access or the channel resistance can predominate in CNTs. We explain in particular that it is not justified to use phenomenological models neglecting the channel resistance in the case of micrometer-long CNTs. This comparison reveals that most experimental conductance values can be explained in the framework of current nanofluidic models by considering experimental variations of slip length and surface charge density and that just a few extraordinarily high values cannot be accounted for even using extreme parameter values. Finally, we discuss how to complete existing models and how to improve the statistical reliability of experimental data in the field.
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Raman amplifié par effet de pointe sur des nanotubes alignés 
Auteur(s): Kundu Anirban, Monthioux Marc, Kandara Mariem, Weber Sébastien J., Tahir S., Jourdain V., Puech Pascal
(Affiches/Poster)
Colloque Francophone du Carbone 'SFEC-2019' (Samatan, FR), 2019-04-23
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Comprehensive model of the optical spectra of carbon nanotubes on a substrate by polarized microscopy 
Auteur(s): Monniello L., Tran H.-N., Vialla R., Prevot G., Tahir S., Michel T., Jourdain V.
(Article) Publié:
-Physical Review B Condensed Matter And Materials Physics (1998-2015), vol. 99 p.115431 (2019)
Texte intégral en Openaccess : 
Ref HAL: hal-02134571_v1
DOI: 10.1103/PhysRevB.99.115431
WoS: 000462895200004
Exporter : BibTex | endNote
Résumé: Polarized optical microscopy and spectroscopy are progressively becoming key methods for the high-throughput characterization of individual carbon nanotubes (CNTs) and other one-dimensional nanostructures, on substrate and in devices. The optical response of CNTs on substrate in cross polarization experiments is usually limited by the polarization conservation of the optical elements in the experimental setup. We developed a theoretical model taking into account the depolarization by the setup and the optical response of the substrate. We show that proper modelization of the experimental data requires to take into account both noncoherent and coherent light depolarization by the optical elements. We also show how the nanotube signal can be decoupled from the complex reflection factor of the antireflection substrate, which is commonly used to enhance the optical contrast. Finally, we describe an experimental protocol to extract the depolarization parameters and the complex nanotube susceptibility, and how it can improve the chirality assignment of individual carbon nanotubes in complex cases.
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One-pot preparation of iron/alumina catalyst for the efficient growth of vertically-aligned carbon nanotube forests 
Auteur(s): Roussey Arthur, Venier Nicolas, Fneich Hussein, Giardella Lucas, Pinaud Thomas, Tahir S., Pelaez-Fernandez Mario, Arenal Raul, Mehdi Ahmad, Jourdain V.
(Article) Publié:
Materials Science And Engineering: B, vol. 245 p.37-46 (2019)
Texte intégral en Openaccess : 
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