Publication
Title
Chirality-dependent mechanical response of empty and water-filled single-wall carbon nanotubes at high pressure
Author
Abstract
The mechanical stability of single-wall carbon nanotubes (SWCNTs) at high pressure was studied by high-resolution resonant Raman and wavelength-dependent fluorescence-excitation (PLE) spectroscopy resolving the vibrational and electronic resonances of 18 individual chiralities and furthermore even resolving the different behaviour of empty (closed, pristine) and water-filled (opened) SWCNTs (diameter range = 0.61.42 nm). We find that water-filling exerts a stabilizing counter-pressure on the SWCNT walls, leading to an increasing difference between the radial breathing mode frequencies of water-filled and empty SWCNTs at elevated pressures. For small diameter SWCNTs (d < 1 nm) with a chiral angle of ∼12°, in particular for the (7,2) chirality, an anomalous behaviour is observed, revealing an increased mechanical instability for these SWCNTs. We furthermore ascribe the longstanding contradiction between experiments and theory on the collapse pressure of SWCNTs to the presence of filling in most experiments to date, while empty SWCNTs follow the theoretically predicted collapse behaviour.
Language
English
Source (journal)
Carbon. - Oxford
Publication
Oxford : 2015
ISSN
0008-6223
Volume/pages
95(2015), p. 442-451
ISI
000363312900053
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 01.12.2017
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
Selective linear and nonlinear optical spectroscopy of carbon nanotubes and their interactions with organic molecules.
Separation and high-resolution spectroscopic characterisation of carbon nanotubes and nanocomposites.
Separation, sorting and enhanced optical properties of intact carbon nanotubes and their composites.
Imaging and advanced spectroscopy of individual carbon nanotubes by IR fluorescence microscopy.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 27.11.2015
Last edited 03.08.2017
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