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Toward Single-Chirality Carbon Nanotube Device Arrays

Vijayaraghavan, Aravind and Hennrich, Frank and Stürzl, Ninette and Engel, Michael and Ganzhorn, Marc and Oron-Carl, Matti and Marquardt, Christoph W. and Dehm, Simone and Lebedkin, Sergei and Kappes, Manfred M. and Krupke, Ralph (2010):
Toward Single-Chirality Carbon Nanotube Device Arrays.
4, In: ACS Nano, (5), pp. 2748-2754, ISSN 1936-0851, [Online-Edition: http://dx.doi.org/10.1021/nn100337t],
[Article]

Abstract

The large-scale integration of devices consisting of individual single-walled carbon nanotubes (SWCNT), all of the same chirality, is a critical step toward their electronic, optoelectronic, and electromechanical application. Here, the authors realize two related goals, the first of which is the fabrication of high-density, single-chirality SWCNT device arrays by dielectrophoretic assembly from monodisperse SWCNT solution obtained by polymer-mediated sorting. Such arrays are ideal for correlating measurements using various techniques across multiple identical devices, which is the second goal. The arrays are characterized by voltage-contrast scanning electron microscopy, electron transport, photoluminescence (PL), and Raman spectroscopy and show identical signatures as expected for single-chirality SWCNTs. In the assembled nanotubes, a large D peak in Raman spectra, a large dark-exciton peak in PL spectra as well as lowered conductance and slow switching in electron transport are all shown to be correlated to each other. By comparison to control samples, we conclude that these are the result of scattering from electronic and not structural defects resulting from the polymer wrapping, similar to what has been predicted for DNA wrapping.

Item Type: Article
Erschienen: 2010
Creators: Vijayaraghavan, Aravind and Hennrich, Frank and Stürzl, Ninette and Engel, Michael and Ganzhorn, Marc and Oron-Carl, Matti and Marquardt, Christoph W. and Dehm, Simone and Lebedkin, Sergei and Kappes, Manfred M. and Krupke, Ralph
Title: Toward Single-Chirality Carbon Nanotube Device Arrays
Language: English
Abstract:

The large-scale integration of devices consisting of individual single-walled carbon nanotubes (SWCNT), all of the same chirality, is a critical step toward their electronic, optoelectronic, and electromechanical application. Here, the authors realize two related goals, the first of which is the fabrication of high-density, single-chirality SWCNT device arrays by dielectrophoretic assembly from monodisperse SWCNT solution obtained by polymer-mediated sorting. Such arrays are ideal for correlating measurements using various techniques across multiple identical devices, which is the second goal. The arrays are characterized by voltage-contrast scanning electron microscopy, electron transport, photoluminescence (PL), and Raman spectroscopy and show identical signatures as expected for single-chirality SWCNTs. In the assembled nanotubes, a large D peak in Raman spectra, a large dark-exciton peak in PL spectra as well as lowered conductance and slow switching in electron transport are all shown to be correlated to each other. By comparison to control samples, we conclude that these are the result of scattering from electronic and not structural defects resulting from the polymer wrapping, similar to what has been predicted for DNA wrapping.

Journal or Publication Title: ACS Nano
Volume: 4
Number: 5
Uncontrolled Keywords: single-wall carbon nanotube; chirality; Raman spectroscopy; photoluminescence spectroscopy; directed assembly; polyoctylfluorenyl; defects
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: 08 Nov 2011 11:37
Official URL: http://dx.doi.org/10.1021/nn100337t
Identification Number: doi:10.1021/nn100337t
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