Gas sensing with au-decorated carbon nanotubes

Z. Zanolli, R. Leghrib, A. Felten, J.-J. Pireaux, E. Llobet, J.-C. Charlier

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The sensing properties of carbon nanotubes (CNTs) decorated with gold nanoparticles have been investigated by means of combined theoretical and experimental approaches. On one hand, first-principles and nonequilibrium Greens functions techniques give access to the microscopic features of the sensing mechanisms in individual nanotubes, such as electronic charge transfers and quantum conductances. On the other hand, drop coating deposition of carbon nanotubes decorated with gold nanoparticles onto sensor substrates and their characterization in the detection of pollutants such as NO , CO, and C H provide insight into the sensing ability of nanotube mats. Using the present combined approaches, the improvement in the detection of some specific gases (NO and CO) using Au-functionalized nanotubes is explained. However, for other gases such as C H , the Au nanoparticles do not seem to play a crucial role in the sensing process when compared with pristine CNTs functionalized with oxygen plasma. Indeed, these different situations can be explained by identifying the relationship between the change of resistance (macroscopic feature) and the shift of the Fermi level (microscopic feature) after gas adsorption. The understanding of the sensing ability at the atomic level opens the way to design new gas sensors and to tune their selectivity by predicting the nature of the metal that is the most appropriate to detect specific molecular species.
langue originaleAnglais
Pages (de - à)4592-4599
Nombre de pages8
journalACS nano
Volume5
Numéro de publication6
Les DOIs
étatPublié - 28 juin 2011

Empreinte digitale

Carbon Nanotubes
Nanotubes
Carbon nanotubes
Gases
carbon nanotubes
Carbon Monoxide
Nanoparticles
Gold
gases
Gas adsorption
nanotubes
Fermi level
Chemical sensors
Green's function
Charge transfer
nanoparticles
Metals
Oxygen
Plasmas
Coatings

Citer ceci

Zanolli, Z., Leghrib, R., Felten, A., Pireaux, J-J., Llobet, E., & Charlier, J-C. (2011). Gas sensing with au-decorated carbon nanotubes. ACS nano, 5(6), 4592-4599. https://doi.org/10.1021/nn200294h
Zanolli, Z. ; Leghrib, R. ; Felten, A. ; Pireaux, J.-J. ; Llobet, E. ; Charlier, J.-C. / Gas sensing with au-decorated carbon nanotubes. Dans: ACS nano. 2011 ; Vol 5, Numéro 6. p. 4592-4599.
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Zanolli, Z, Leghrib, R, Felten, A, Pireaux, J-J, Llobet, E & Charlier, J-C 2011, 'Gas sensing with au-decorated carbon nanotubes', ACS nano, VOL. 5, Numéro 6, p. 4592-4599. https://doi.org/10.1021/nn200294h

Gas sensing with au-decorated carbon nanotubes. / Zanolli, Z.; Leghrib, R.; Felten, A.; Pireaux, J.-J.; Llobet, E.; Charlier, J.-C.

Dans: ACS nano, Vol 5, Numéro 6, 28.06.2011, p. 4592-4599.

Résultats de recherche: Contribution à un journal/une revueArticle

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Zanolli Z, Leghrib R, Felten A, Pireaux J-J, Llobet E, Charlier J-C. Gas sensing with au-decorated carbon nanotubes. ACS nano. 2011 juin 28;5(6):4592-4599. https://doi.org/10.1021/nn200294h