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Femtosecond carrier dynamics in bulk graphite and graphene paper

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2011
Author Carbone Fabrizio et al.,
Project The dynamics of chemical bonds by ultrafast electron diffraction
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Original article (peer-reviewed)

Journal Chemical Physics Letters
Volume (Issue) 504
Page(s) 37 - 41
Title of proceedings Chemical Physics Letters
DOI doi:10.1016/j.cplett.2011.01.052

Abstract

Femtosecond white-light continuum probe transient absorption and reflectivity measurements of bulk graphite and graphene paper are reported. In graphite, the relaxation of photoinduced electron–hole pairs happens through in-plane electron–electron and electron–phonon scattering in ’200 fs, while the ps dynamics is due to the modulation of the electronic structure by out-of-plane structural motions. The ps dynamics of the optical signal is strongly reduced in graphene paper, where the out-of-plane bond is disrupted, while the short component of the dynamics is identical in both materials. These results show that in 2D-graphene, the carrier relaxation occurs in ’200 fs.
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