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      Experimental and theoretical studies of transport through large scale, partially aligned arrays of single-walled carbon nanotubes in thin film type transistors

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      Author
      Kocabas, C.
      Pimparkar, N.
      Yesilyurt O.
      Kang, S.J.
      Alam, M.A.
      Rogers J.A.
      Date
      2007
      Source Title
      Nano Letters
      Print ISSN
      15306984
      Volume
      7
      Issue
      5
      Pages
      1195 - 1202
      Language
      English
      Type
      Article
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      Abstract
      Gate-modulated transport through partially aligned films of single-walled carbon nanotubes (SWNTs) in thin film type transistor structures are studied experimentally and theoretically. Measurements are reported on SWNTs grown by chemical vapor deposition with systematically varying degrees of alignment and coverage in transistors with a range of channel lengths and orientations perpendicular and parallel to the direction of alignment. A first principles stick-percolation-based transport model provides a simple, yet quantitative framework to interpret the sometimes counterintuitive transport parameters measured in these devices. The results highlight, for example, the dramatic influence of small degrees of SWNT misalignment on transistor performance and imply that coverage and alignment are correlated phenomena and therefore should be simultaneously optimized. The transport characteristics reflect heterogeneity in the underlying anisotropic metal-semiconductor stick-percolating network and cannot be reproduced by classical transport models. © 2007 American Chemical Society.
      Keywords
      Channel lengths
      Partially aligned arrays
      Transistor performance
      Transport models
      Alignment
      Chemical vapor deposition
      Film growth
      Thin film transistors
      Single-walled carbon nanotubes (SWCN)
      Permalink
      http://hdl.handle.net/11693/23468
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/nl062907m
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      • Institute of Materials Science and Nanotechnology 1589

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