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.

Galimberti, G., Ponzoni, S., Cartella, A., Cole, M. T., Hofmann, S., Cepek, C., Ferrini, G., Pagliara, S., Transient reflectivity on vertically aligned single-wall carbon nanotubes, <<THIN SOLID FILMS>>, 2013; 543 (Settembre): 51-55. [doi:10.1016/j.tsf.2013.02.133] [http://hdl.handle.net/10807/56645]

Transient reflectivity on vertically aligned single-wall carbon nanotubes

Ferrini, Gabriele;Pagliara, Stefania
2013

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
Inglese
Galimberti, G., Ponzoni, S., Cartella, A., Cole, M. T., Hofmann, S., Cepek, C., Ferrini, G., Pagliara, S., Transient reflectivity on vertically aligned single-wall carbon nanotubes, <<THIN SOLID FILMS>>, 2013; 543 (Settembre): 51-55. [doi:10.1016/j.tsf.2013.02.133] [http://hdl.handle.net/10807/56645]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10807/56645
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