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NMR investigation of n-alkylamine self-organization along the sidewalls of single-wall carbon nanotubes (SWNTs)

NMR investigation of n-alkylamine self-organization along the sidewalls of single-wall carbon nanotubes (SWNTs)
NMR investigation of n-alkylamine self-organization along the sidewalls of single-wall carbon nanotubes (SWNTs)
Single wall carbon nanotubes (SWNTs) have drawn considerable attention from the scientific community based on their potentially unique 1-D electronic and optical properties as well as mechanical properties. These characteristics result from the one dimensional quantum wire structure of CNTs, which have the spike-like van Hove singularities (vHs) in the electronic density of states. The detailed shape of the density of states function depends sensitively on CNT type semiconducting (sem-) versus metallic (met-)), diameter and chirality. Using the preferential affinity of amines towards sem -SWNTs, our group has been able to attain bulk separation by type based on a differential solubility of SWNTs according to the amine organization interaction on the nanotube surface. It has been argued that stable dispersions of sem -SWNTs with surfactant-amines originate from the organization of the aliphatic chain along the nanotube sidewalls, along with a small amount of zwitterions. The separation of sem-enriched SWNTs assisted by octadecylamine (ODA) had been depicted in the form of either small amount of zwitterionic interaction between carboxylic acid groups of acid-purified SWNTs or the physisorption on the SWNTs sidewall, leaving met -SWNTs in the precipitate.
1946-4274
Ju, Sang-Yong
6d99cea5-a544-49f2-9a3f-b1347132e587
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Papadimitrakopoulos, Fotios
8de3549f-a482-441a-bb31-d1f5269d873c
Ju, Sang-Yong
6d99cea5-a544-49f2-9a3f-b1347132e587
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Papadimitrakopoulos, Fotios
8de3549f-a482-441a-bb31-d1f5269d873c

Ju, Sang-Yong, Utz, Marcel and Papadimitrakopoulos, Fotios (2004) NMR investigation of n-alkylamine self-organization along the sidewalls of single-wall carbon nanotubes (SWNTs). MRS Proceedings, 858. (doi:10.1557/PROC-858-HH3.18).

Record type: Article

Abstract

Single wall carbon nanotubes (SWNTs) have drawn considerable attention from the scientific community based on their potentially unique 1-D electronic and optical properties as well as mechanical properties. These characteristics result from the one dimensional quantum wire structure of CNTs, which have the spike-like van Hove singularities (vHs) in the electronic density of states. The detailed shape of the density of states function depends sensitively on CNT type semiconducting (sem-) versus metallic (met-)), diameter and chirality. Using the preferential affinity of amines towards sem -SWNTs, our group has been able to attain bulk separation by type based on a differential solubility of SWNTs according to the amine organization interaction on the nanotube surface. It has been argued that stable dispersions of sem -SWNTs with surfactant-amines originate from the organization of the aliphatic chain along the nanotube sidewalls, along with a small amount of zwitterions. The separation of sem-enriched SWNTs assisted by octadecylamine (ODA) had been depicted in the form of either small amount of zwitterionic interaction between carboxylic acid groups of acid-purified SWNTs or the physisorption on the SWNTs sidewall, leaving met -SWNTs in the precipitate.

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More information

Published date: 2004
Organisations: Chemistry, Faculty of Natural and Environmental Sciences, Magnetic Resonance

Identifiers

Local EPrints ID: 355570
URI: https://eprints.soton.ac.uk/id/eprint/355570
ISSN: 1946-4274
PURE UUID: 9a340886-a654-4fa2-8f82-812feeb932a4
ORCID for Marcel Utz: ORCID iD orcid.org/0000-0003-2274-9672

Catalogue record

Date deposited: 25 Oct 2013 13:13
Last modified: 20 Jul 2019 00:40

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