Accueil >
Production scientifique
|
|
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
|
|
|
|
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, 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.
|
|
|
|
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 :
|
|
|
|
Electrolyte transport through single−walled carbon nanotubes
Auteur(s): Henn F., Yazda K., Tahir S., Michel T., Loubet Bastien, Manghi Manoel, Bentin Jeremy, Picaud Fabien, Palmeri J., Jourdain V.
Conference: JOURNÉES DE LA MATIÈRE CONDENSÉE 2018 (JMC2018) (Grenoble, FR, 2018-08-27)
Ref HAL: hal-01947964_v1
Exporter : BibTex | endNote
Résumé: We present experimental and theoretical results on the electrical conductivity and other properties of carbon nanotubes.
|
|
|
|
Studying the growth of single-walled carbon nanotubes by optical means
Auteur(s): Jourdain V.
Conference: MRS Fall Meeting (Boston, US, 2018-11-27)
|
|
|
|
Transport of ions in solution through single-walled carbon nanotubes
Auteur(s): Yazda K., Tahir S., Michel T., Loubet Bastien, Manghi Manoel, Bentin Jérémy, Picaud Fabien, Palmeri J., Henn F., Jourdain V.
Conference: Chemontubes 2018 (Biarritz, FR, 2018-04-22)
|
|
|
|
Role of charge regulation and flow slip in the ionic conductance of nanopores: An analytical approach
Auteur(s): Manghi Manoel, Palmeri J., Yazda K., Henn F., Jourdain V.
(Article) Publié:
Physical Review E, vol. 98 p.012605 (2018)
Texte intégral en Openaccess : 
Ref HAL: hal-01844602_v1
Ref Arxiv: 1712.01055
DOI: 10.1103/PhysRevE.98.012605
WoS: 000439065200005
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
6 Citations
Résumé: The number of precise conductance measurements in nanopores is quickly growing. To clarify the dominant mechanisms at play and facilitate the characterization of such systems for which there is still no clear consensus, we propose an analytical approach to the ionic conductance in nanopores that takes into account (i) electro-osmotic effects, (ii) flow slip at the pore surface for hydrophobic nanopores, (iii) a component of the surface charge density that is modulated by the reservoir pH and salt concentration cs using a simple charge regulation model, and (iv) a fixed surface charge density that is unaffected by pH and cs . Limiting cases are explored for various ranges of salt concentration and our formula is used to fit conductance experiments found in the literature for carbon nanotubes. This approach permits us to catalog the different possible transport regimes and propose an explanation for the wide variety of currently known experimental behavior for the conductance versus cs .
|
