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Single‐Walled Carbon Nanotubes Shock‐Compressed to 0.5 Mbar (Phys. Status Solidi B 11/2017)
Author(s) -
Botella Pablo,
Devaux Xavier,
Dossot Manuel,
Garashchenko Viktor,
Beltzung Jean Charles,
Soldatov Alexander V.,
Ananev Sergey
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201770259
Subject(s) - high resolution transmission electron microscopy , graphene , raman spectroscopy , materials science , carbon nanotube , amorphous carbon , carbon fibers , molecular physics , nanotechnology , transmission electron microscopy , optics , composite number , composite material , chemistry , physics
Single‐walled carbon nanotubes (SWCNTs) have been dynamically (shock) compressed to 0.5 Mbar, above the limit of their structural integrity. Two distinct types of material are identified by high‐resolution transmission electron microscopy (HRTEM) and multi‐wavelength Raman spectroscopy in the sample recovered after shock: multi‐layer graphene (MLG) and a two‐phase material composed of nano‐clustered graphene and amorphous carbon whereas no diamond‐like carbon or carbon nano‐onions are found. Peak decomposition of the Raman spectra was used to estimate the coherent scatterers (clusters) size in MLG at 36 nm from the D‐ to G‐band intensity ratio dependence on the photon excitation energy. Botella et al. (article no. 1700315 ) propose the peak fitting model for decomposition of the Raman spectra of highly disordered carbon material containing graphene nano‐clusters and stress the importance of accounting for heptagonal‐ and pentagonal‐ring defects in graphene layers for the analysis of such spectra. The cover image shows HRTEM images and the correspondent Raman spectra of the two types of material along with peak decomposition of the two‐phase material with the peaks assigned to heptagons (a) and pentagons (b). Particulars of the SWCNTs transformation to other structural forms of carbon at high pressure/temperature are discussed.