Interlayer Interaction Effects on the G Modes in Double‐Walled Carbon Nanotubes With Different Electronic Configurations. Issue 11 (8th August 2017)

• Record Type: Journal Article
• Authors: Levshov, Dmitry I.; Tran, Huy‐Nam; Michel, Thierry; Cao, Thi Thanh; Nguyen, Van Chuc; Arenal, Raul; Popov, Valentin N.; Sauvajol, Jean‐Louis; Zahab, Ahmed‐Azmi; Paillet, Matthieu
• Is Part Of: Physica status solidi. Volume 254:Issue 11(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-08-08
• Subjects: double‐walled carbon nanotubes -- interlayer interaction -- Raman spectroscopy; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201700251
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : We present experimental measurements of the features of G band in individual index‐identified free‐standing double‐walled carbon nanotubes. We examine Raman spectra of different electronic configurations of DWNTs, namely: SC@SC, SC@M, M@SC, M@M, and clearly establish that, as in SWNTs, the profile of LO G‐mode of each layer is broad (narrow) when the layer is metallic (semiconducting). The dependence of G‐modes on the diameter and inter‐layer distance in several SC@SC, SC@M, M@SC, M@M index‐identified DWNTs is reported. We find, that, independently of the metallic or semiconducting nature of the layers, the frequencies of LO and TO G‐mode of the inner and outer layers shift significantly with respect to the frequencies of the same modes in the constituent SWNTs. Abstract : Double‐walled carbon nanotubes are one of the most ideal and fundamental systems to study the effects of interwall coupling on the physical properties in one‐dimensional structures. This article provides information on the features of G band in individual index‐identified free‐standing DWNTs with different electronic configurations and wall‐to‐wall distance. Authors show that independently of the metallic or semiconducting nature of the layers, the frequencies of LO and TO G‐mode of the inner and outer layers shift significantly with respect to the frequencies of the same modes in the constituent SWNTs.