Electron dynamics in unoccupied states of spatially aligned 7-a graphene nanoribbons on Au(788)

Kleimeier NF, Timmer A, Bignardi L, Moenig H, Feng XL, Muellen K, Chi LF, Fuchs H, Zacharias H (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Physical Review B - Condensed Matter and Materials Physics American Physical Society (APS)

Book Volume: 90

Article Number: 245408

Journal Issue: 24

DOI: 10.1103/PhysRevB.90.245408

Abstract

Bottom-up synthesized armchair graphene nanoribbons with a width of seven C=C bonds (7-aGNRs) have gained widespread interest due to their large band gap of about 2.8 eV and their atomically precise edge structures. Here, we report on the lifetime of excited states of spatially aligned 7-aGNRs grown on a vicinal Au(788) surface. Time-resolved three-photon photoemission spectroscopy at hν=3.15 eV was carried out to measure the lifetimes of states located at E1-EF=3.6 eV and E2-EF=3.8 eV via a resonant excitation from an unoccupied state at E-EF=0.6 eV. Lifetimes of τ1=(110±13) fs and τ2=(75±10) fs are observed, respectively.

Involved external institutions

Westfälische Wilhelms-Universität (WWU) Münster DE Germany (DE) Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research DE Germany (DE)

How to cite

APA:

Kleimeier, N.F., Timmer, A., Bignardi, L., Moenig, H., Feng, X.L., Muellen, K.,... Zacharias, H. (2014). Electron dynamics in unoccupied states of spatially aligned 7-a graphene nanoribbons on Au(788). Physical Review B - Condensed Matter and Materials Physics, 90(24). https://dx.doi.org/10.1103/PhysRevB.90.245408

MLA:

Kleimeier, N. F., et al. "Electron dynamics in unoccupied states of spatially aligned 7-a graphene nanoribbons on Au(788)." Physical Review B - Condensed Matter and Materials Physics 90.24 (2014).

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