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

Iskandar Yahya, Francesco Bonaccorso, Steven K. Clowes, Andrea C. Ferrari, S. R P Silva

Research output: Contribution to journalArticle

13 Citations (Scopus)

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<sup>-13</sup> A), high ON/OFF current ratio (>10<sup>6</sup>) and charge carriers mobility ∼ 40 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>.

Original languageEnglish
Pages (from-to)574-594
Number of pages21
JournalCarbon
Volume93
DOIs
Publication statusPublished - 8 Aug 2015
Externally publishedYes

Fingerprint

Carbon Nanotubes
Chromatography
Sepharose
Carbon nanotubes
Gels
Temperature
Microfiltration
Carrier mobility
Sodium dodecyl sulfate
Micelles
Charge carriers
Sorting
Surface-Active Agents
Sodium Dodecyl Sulfate
Thermal effects
Transistors
Surface active agents

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Temperature dependent separation of metallic and semiconducting carbon nanotubes using gel agarose chromatography. / Yahya, Iskandar; Bonaccorso, Francesco; Clowes, Steven K.; Ferrari, Andrea C.; Silva, S. R P.

In: Carbon, Vol. 93, 08.08.2015, p. 574-594.

Research output: Contribution to journalArticle

Yahya, Iskandar ; Bonaccorso, Francesco ; Clowes, Steven K. ; Ferrari, Andrea C. ; Silva, S. R P. / Temperature dependent separation of metallic and semiconducting carbon nanotubes using gel agarose chromatography. In: Carbon. 2015 ; Vol. 93. pp. 574-594.
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