The photoinduced charge transfer mechanism in aligned and unaligned carbon nanotubes (Articolo in rivista)

Type
Label
  • The photoinduced charge transfer mechanism in aligned and unaligned carbon nanotubes (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.carbon.2011.07.042 (literal)
Alternative label
  • Gianluca Galimberti, Stefania Pagliara, Stefano Ponzoni, Stefano Dal Conte, Federico Cilento, Gabriele Ferrini, Stephan Hofmann, Muhammad Arshad, Cinzia Cepek, Fulvio Parmigiani (2011)
    The photoinduced charge transfer mechanism in aligned and unaligned carbon nanotubes
    in Carbon; Pergamon-Elsevier Science Ltd., Oxford (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gianluca Galimberti, Stefania Pagliara, Stefano Ponzoni, Stefano Dal Conte, Federico Cilento, Gabriele Ferrini, Stephan Hofmann, Muhammad Arshad, Cinzia Cepek, Fulvio Parmigiani (literal)
Pagina inizio
  • 5246 (literal)
Pagina fine
  • 5252 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0008622311006099 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 49 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Note
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Gianluca Galimberti a, Stefania Pagliara a,*, Stefano Ponzoni a, Stefano Dal Conte b, Federico Cilento c, Gabriele Ferrini a, Stephan Hofmann d, Muhammad Arshad e,h,i, Cinzia Cepek f, Fulvio Parmigiani g a Dipartimento di Matematica e Fisica, Universita` Cattolica del Sacro Cuore, I-25121 Brescia, Italy b Dipartimento di Fisica, Universita` di Pavia, I-27100 Pavia, Italy c Dipartimento di Fisica, Universita` di Trieste and Laboratorio Nazionale TASC, AREA Science Park, Basovizza, Trieste I-34012, Italy d Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK e ICTP, Strada Costiera 11, I-34151 Trieste, Italy f Istituto Officina dei Materiali - CNR, Laboratorio TASC, Area Science Park, Basovizza, I-34149 Trieste, Italy g Dipartimento di Fisica, Universita` di Trieste and Sincrotrone Trieste, I-34012 Basovizza, Trieste, Italy h Zernike Institute for Advanced Materials, University of Groningen, The Netherlands i National centre for Physics Quaid-i-Azam University Islamabad, Pakistan (literal)
Titolo
  • The photoinduced charge transfer mechanism in aligned and unaligned carbon nanotubes (literal)
Abstract
  • Using time-resolved reflectivity measurements on unaligned and aligned bundled singlewall carbon nanotubes with a pump energy of 1.55 eV, quasi-resonant with the second Van Hove singularity of semiconducting tubes, a positive sign of the transient reflectivity is detected in unaligned nanotubes. In contrast a negative sign is detected in aligned nanotubes. This discovery addresses a long-standing question showing that in unaligned nanotubes the stronger intertube interactions favor the formation of short-lived free charge carriers in semiconducting tubes. A detailed analysis of the transient reflectivity spectral response shows that the free carriers in the photo-excited state of semiconducting tubes move towards metallic tubes in about 400 fs. (literal)
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