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Highly Efficient and Scalable Separation of Semiconducting Carbon Nanotubes via Weak Field Centrifugation

Reis, Wieland G. and Weitz, R. Thomas and Kettner, Michel and Kraus, Alexander and Schwab, Matthias Georg and Tomović, Željko and Krupke, Ralph and Mikhael, Jules (2016):
Highly Efficient and Scalable Separation of Semiconducting Carbon Nanotubes via Weak Field Centrifugation.
In: Scientific Reports, pp. 26259 (1--9), 6, ISSN 2045-2322, [Online-Edition: http://dx.doi.org/10.1038/srep26259],
[Article]

Abstract

The identification of scalable processes that transfer random mixtures of single-walled carbon nanotubes (SWCNTs) into fractions featuring a high content of semiconducting species is crucial for future application of SWCNTs in high-performance electronics. Herein we demonstrate a highly efficient and simple separation method that relies on selective interactions between tailor-made amphiphilic polymers and semiconducting SWCNTs in the presence of low viscosity separation media. High purity individualized semiconducting SWCNTs or even self-organized semiconducting sheets are separated from an as-produced SWCNT dispersion via a single weak field centrifugation run. Absorption and Raman spectroscopy are applied to verify the high purity of the obtained SWCNTs. Furthermore SWCNT - network field-effect transistors were fabricated, which exhibit high ON/OFF ratios (10^5) and field-effect mobilities (17 cm^2/Vs). In addition to demonstrating the feasibility of high purity separation by a novel low complexity process, our method can be readily transferred to large scale production.

Item Type: Article
Erschienen: 2016
Creators: Reis, Wieland G. and Weitz, R. Thomas and Kettner, Michel and Kraus, Alexander and Schwab, Matthias Georg and Tomović, Željko and Krupke, Ralph and Mikhael, Jules
Title: Highly Efficient and Scalable Separation of Semiconducting Carbon Nanotubes via Weak Field Centrifugation
Language: English
Abstract:

The identification of scalable processes that transfer random mixtures of single-walled carbon nanotubes (SWCNTs) into fractions featuring a high content of semiconducting species is crucial for future application of SWCNTs in high-performance electronics. Herein we demonstrate a highly efficient and simple separation method that relies on selective interactions between tailor-made amphiphilic polymers and semiconducting SWCNTs in the presence of low viscosity separation media. High purity individualized semiconducting SWCNTs or even self-organized semiconducting sheets are separated from an as-produced SWCNT dispersion via a single weak field centrifugation run. Absorption and Raman spectroscopy are applied to verify the high purity of the obtained SWCNTs. Furthermore SWCNT - network field-effect transistors were fabricated, which exhibit high ON/OFF ratios (10^5) and field-effect mobilities (17 cm^2/Vs). In addition to demonstrating the feasibility of high purity separation by a novel low complexity process, our method can be readily transferred to large scale production.

Journal or Publication Title: Scientific Reports
Volume: 6
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 20 Dec 2016 11:45
Official URL: http://dx.doi.org/10.1038/srep26259
Identification Number: doi:10.1038/srep26259
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