Interlayer Dependence of G-Modes in Semiconducting Double-Walled Carbon Nanotubes
Financiación FP7 / Fp7 Funds
Resumen: A double-walled carbon nanotube (DWNT), a coaxial composite of two single-walled carbon nanotubes (SWNT), provides a unique model to study interactions between the two constituent SWNTs. Combining high resolution transmission electron microscopy (HRTEM), electron diffraction (ED), and resonant Raman scattering (RRS) experiments on the same individual suspended DWNT is the ultimate way to relate unambiguously its atomic structure, defined by the chiral indices of the coaxial outer/inner SWNTs, and its Raman-active vibration modes. This approach is used to investigate the intertube distance dependence of the G-modes of individual index-identified DWNTs composed of two semiconducting SWNTs. We state the main features of the dependence of the G-mode frequencies on the distance between the inner and outer layers: (i) When the interlayer distance is larger than the nominal van der Waals distance (close to 0.34 nm), a downshift of the inner-layer G-modes with respect to the G-modes in the equivalent SWNTs is measured. (ii) The amplitude of the downshift depends on the interlayer distance, or in other words, on the negative pressure felt by the inner layer in DWNT. (iii) No shift is observed for an intertube distance close to 0.34 nm.
Idioma: Inglés
DOI: 10.1021/acs.jpcc.5b05888
Año: 2015
Publicado en: Journal of Physical Chemistry C 119, 40 (2015), 23196-23202
ISSN: 1932-7447

Factor impacto JCR: 4.509 (2015)
Categ. JCR: CHEMISTRY, PHYSICAL rank: 30 / 144 = 0.208 (2015) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 39 / 271 = 0.144 (2015) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 22 / 83 = 0.265 (2015) - Q2 - T1

Factor impacto SCIMAGO:

Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Financiación: info:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P
Tipo y forma: Article (PrePrint)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)

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