학술논문
Unravelling the Complete Raman Response of Graphene Nanoribbons Discerning the Signature of Edge Passivation.
Document Type
Academic Journal
Author
Milotti V; Faculty of Physics, University of Vienna, 1090, Vienna, Austria.; Berkmann C; Faculty of Physics, University of Vienna, 1090, Vienna, Austria.; Laranjeira J; CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193, Aveiro, Portugal.; Cui W; Faculty of Physics, University of Vienna, 1090, Vienna, Austria.; Cao K; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.; Zhang Y; State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China.; School of Engineering, Huzhou University, Huzhou, Zhejiang, 313000, P. R. China.; Kaiser U; Central Facility for Electron Microscopy, Electron Microscopy Group of Materials Science, Ulm University, 89081, Ulm, Germany.; Yanagi K; Department of Physics, Tokyo Metropolitan University, Tokyo, 192-039, Japan.; Melle-Franco M; CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.; Shi L; State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China.; Pichler T; Faculty of Physics, University of Vienna, 1090, Vienna, Austria.; Ayala P; Faculty of Physics, University of Vienna, 1090, Vienna, Austria.
Source
Publisher: WILEY-VCH Verlag GmbH & Co. KGaA Country of Publication: Germany NLM ID: 101724536 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2366-9608 (Electronic) Linking ISSN: 23669608 NLM ISO Abbreviation: Small Methods Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
Controlling the edge morphology and terminations of graphene nanoribbons (GNR) allows tailoring their electronic properties and boosts their application potential. One way of making such structures is encapsulating them inside single-walled carbon nanotubes. Despite the versatility of Raman spectroscopy to resolve strong spectral signals of these systems, discerning the response of long nanoribbons from that of any residual precursor remaining outside after synthesis has been so far elusive. Here, the terrylene dye is used as precursor to make long and ultra-narrow armchair-edged GNR inside nanotubes. The alignment and characteristic length of terrylene encapsulated parallel to the tube's axis facilitates the ribbon formation via polymerization, with high stability up to 750 °C when the hybrid system is kept in high vacuum. A high temperature annealing is used to remove the terrylene external molecules and a subtraction model based on the determination of a scaling factor related to the G-band response of the system is developed. This not only represents a critical step forward toward the analysis of the nanoribbon-nanotube system, but it is a study that enables unraveling the Raman signatures of the individual CH-modes (the signature of edge passivation) for GNR for the first time with unprecedented detail.
(© 2022 The Authors. Small Methods published by Wiley-VCH GmbH.)
(© 2022 The Authors. Small Methods published by Wiley-VCH GmbH.)