Data Entry: Please note that the research database will be replaced by UNIverse by the end of October 2023. Please enter your data into the system https://universe-intern.unibas.ch. Thanks

Login for users with Unibas email account...

Login for registered users without Unibas email account...

 
A Universal Length-Dependent Vibrational Mode in Graphene Nanoribbons
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4528409
Author(s) Overbeck, Jan; Borin Barin, Gabriela; Daniels, Colin; Perrin, Mickael L.; Braun, Oliver; Sun, Qiang; Darawish, Rimah; De Luca, Marta; Wang, Xiao-Ye; Dumslaff, Tim; Narita, Akimitsu; Müllen, Klaus; Ruffieux, Pascal; Meunier, Vincent; Fasel, Roman; Calame, Michel
Author(s) at UniBasel De Luca, Marta
Year 2019
Title A Universal Length-Dependent Vibrational Mode in Graphene Nanoribbons
Journal ACS Nano
Volume 13
Number 11
Pages / Article-Number 13083-13091
Keywords graphene nanoribbons, Raman spectroscopy, length-dependent mode, STM, substrate transfer, vibrational modes, DFT
Abstract Graphene nanoribbons (GNRs) have attracted considerable interest, as their atomically tunable structure makes them promising candidates for future electronic devices. However, obtaining detailed information about the length of GNRs has been challenging and typically relies on low-temperature scanning tunneling microscopy. Such methods are ill-suited for practical device application and characterization. In contrast, Raman spectroscopy is a sensitive method for the characterization of GNRs, in particular for investigating their width and structure. Here, we report on a length-dependent, Raman-active low-energy vibrational mode that is present in atomically precise, bottom-up-synthesized armchair graphene nanoribbons (AGNRs). Our Raman study demonstrates that this mode is present in all families of AGNRs and provides information on their length. Our spectroscopic findings are corroborated by scanning tunneling microscopy images and supported by first-principles calculations that allow us to attribute this mode to a longitudinal acoustic phonon. Finally, we show that this mode is a sensitive probe for the overall structural integrity of the ribbons and their interaction with technologically relevant substrates.
Publisher American Chemical Society
ISSN/ISBN 1936-0851 ; 1936-086X
URL https://pubs.acs.org/doi/10.1021/acsnano.9b05817
edoc-URL https://edoc.unibas.ch/75314/
Full Text on edoc Restricted
Digital Object Identifier DOI 10.1021/acsnano.9b05817
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/31573799
ISI-Number 000500650000080
Document type (ISI) Article
 
   

MCSS v5.8 PRO. 0.377 sec, queries - 0.000 sec ©Universität Basel  |  Impressum   |    
28/03/2024