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Temperature dependent separation of metallic and semiconducting carbon nanotubes using gel agarose chromatography

Clowes, Steven, Silva, S, Yahya, I, Bonaccorso, F and Ferrari, AC (2015) Temperature dependent separation of metallic and semiconducting carbon nanotubes using gel agarose chromatography Carbon, 93. pp. 574-594.

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Abstract

Post-synthesis separation of metallic (m-SWNTs) and semiconducting (s-SWNTs) single-wall carbon nanotubes (SWNTs) remains a challenging process. Gel agarose chromatography is emerging as an efficient and large scale separation technique. However, the full (100%) separation has not been achieved yet, mainly due to the lack of understanding of the underlying mechanism. Here, we study the temperature effect on the SWNTs separation via gel agarose chromatography, for four different SWNT sources. Exploiting a gel agarose micro-beads filtration technique we achieve up to 70% m-SWNTs and over 90% s-SWNTs, independent of the source material. The process is temperature dependent, with yields up to 95% for s-SWNT (HiPco) at 6 °C. Temperature affects the sodium dodecyl sulfate surfactant-micelle distribution along the SWNT sidewalls, thus determining the effectiveness of the SWNTs sorting by electronic type. The sorted SWNTs are then used to fabricate transistors with very low OFF-currents (∼10−13 A), high ON/OFF current ratio (>106) and charge carriers mobility ∼ 40 cm2 V−1 s−1.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute
Authors :
NameEmailORCID
Clowes, StevenS.Clowes@surrey.ac.ukUNSPECIFIED
Silva, SS.Silva@surrey.ac.ukUNSPECIFIED
Yahya, IUNSPECIFIEDUNSPECIFIED
Bonaccorso, FUNSPECIFIEDUNSPECIFIED
Ferrari, ACUNSPECIFIEDUNSPECIFIED
Date : 21 May 2015
Identification Number : 10.1016/j.carbon.2015.05.036
Copyright Disclaimer : ©� 2015 Elsevier Ltd. All rights reserved
Related URLs :
Additional Information : Accompanying dataset at http://epubs.surrey.ac.uk/807812/
Depositing User : Symplectic Elements
Date Deposited : 18 Aug 2017 11:39
Last Modified : 31 Oct 2017 17:40
URI: http://epubs.surrey.ac.uk/id/eprint/808626

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