CUED Publications database

Transient reflectivity on vertically aligned single-wall carbon nanotubes

Galimberti, G and Ponzoni, S and Ferrini, G and Hofmann, S and Arshad, M and Cepek, C and Pagliara, S (2013) Transient reflectivity on vertically aligned single-wall carbon nanotubes. Thin Solid Films, 543. pp. 51-55. ISSN 0040-6090

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Abstract

One-color transient reflectivity measurements are carried out on two different samples of vertically aligned single-wall carbon nanotube bundles and compared with the response recently published on unaligned bundles. The negative sign of the optical response for both samples indicates that the free electron character revealed on unaligned bundles is only due to the intertube interactions favored by the tube bending. Neither the presence of bundles nor the existence of structural defects in aligned bundles is able to induce a free-electron like behavior of the photoexcited carriers. This result is also confirmed by the presence of non-linear excitonic effects in the transient response of the aligned bundles. © 2013 Elsevier B.V.

Item Type: Article
Uncontrolled Keywords: Excitons Single-wall carbon nanotubes Time resolved optical spectroscopy
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:05
Last Modified: 08 Dec 2014 02:17
DOI: 10.1016/j.tsf.2013.02.133