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Significance of bundling effects on carbon nanotubes' response to hydrostatic compression

Abstract: The study of the G-mode pressure coefficients of carbon nanotubes, reflecting the stiff sp2 bond pressure dependence, is essential to the understanding of their extraordinary mechanical properties as well as fundamental mechanics. However, it is hindered by the availability of carbon nanotubes samples only as bundles or isolated with surfactants. Octadecylamine-functionalized carbon nanotubes are mostly of a single diameter and can be stably dispersed in 1,2-dichloroethane and chloroform without surfactants. Here we perform high-pressure Raman spectroscopy on these tubes and obtain their experimental G-mode pressure coefficients for individual tubes and bundles. The G+ pressure coefficient for bundles is only about half of that for individual tubes in 1,2-dichloroethane and is about two-thirds in chloroform. The G- pressure coefficient for bundles is about one-third of G+ in 1,2-dichloroethane and about the same in chloroform. These results for the first time provide unambiguous experimental evidence of the significant effect of bundling on carbon nanotubes' G-mode pressure coefficients, identifying it as one of the major reasons for the lack of consensus on what the values should be in the literature.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: J. Phys. Chem. C, 2016, 120 (3), pp 1863-1870

Editorial: American Chemical Society

 Fecha de publicación: 01/01/2016

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1021/acs.jpcc.5b09082

ISSN: 1932-7447,1932-7455

Proyecto europeo: info:eu-repo/grantAgreement/EC/FP7/303535/EU/Chromophore-Sensitized Up-Conversion in Lanthanide Materials/ChromeSENSUC/

Url de la publicación: https://doi.org/10.1021/acs.jpcc.5b09082

Autores/as

SCOTT, KEN A. M.

DONOVAN, KEVIN J.

SAPELKIN, ANDREI V.

DUNSTAN, DAVID J.