Nano Research

, Volume 5, Issue 5, pp 307–319 | Cite as

Effect of carbon nanotube network morphology on thin film transistor performance

  • Marina Y. Timmermans
  • David Estrada
  • Albert G. Nasibulin
  • Joshua D. Wood
  • Ashkan Behnam
  • Dong-ming Sun
  • Yutaka Ohno
  • Joseph W. Lyding
  • Abdou Hassanien
  • Eric Pop
  • Esko I. Kauppinen
Research Article

Abstract

The properties of electronic devices based on carbon nanotube networks (CNTNs) depend on the carbon nanotube (CNT) deposition method used, which can yield a range of network morphologies. Here, we synthesize single-walled CNTs using an aerosol (floating catalyst) chemical vapor deposition process and deposit CNTs at room temperature onto substrates as random networks with various morphologies. We use four CNT deposition techniques: electrostatic or thermal precipitation, and filtration through a filter followed by press transfer or dissolving the filter. We study the mobility using pulsed measurements to avoid hysteresis, the on/off ratio, and the electrical noise properties of the CNTNs, and correlate them to the network morphology through careful imaging. Among the four deposition methods thermal precipitation is found to be a novel approach to prepare high-performance, partially aligned CNTNs that are dry-deposited directly after their synthesis. Our results provide new insight into the role of the network morphologies and offer paths towards tunable transport properties in CNT thin film transistors.

Keywords

Carbon nanotube network thin film transistor morphology mobility image processing hysteresis 

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Marina Y. Timmermans
    • 1
  • David Estrada
    • 2
  • Albert G. Nasibulin
    • 1
  • Joshua D. Wood
    • 2
    • 3
  • Ashkan Behnam
    • 2
  • Dong-ming Sun
    • 4
  • Yutaka Ohno
    • 4
  • Joseph W. Lyding
    • 2
    • 3
  • Abdou Hassanien
    • 5
    • 6
  • Eric Pop
    • 2
    • 3
  • Esko I. Kauppinen
    • 1
  1. 1.NanoMaterials Group, Department of Applied Physics & Center for New MaterialsAalto UniversityEspooFinland
  2. 2.Department of Electrical & Computer Eng., Micro & Nanotechnology LabUniversity of IllinoisUrbanaUSA
  3. 3.Beckman InstituteUniversity of IllinoisUrbanaUSA
  4. 4.Department of Quantum EngineeringNagoya UniversityNagoyaJapan
  5. 5.National Institute of ChemistryLjubljanaSlovenia
  6. 6.Electronics and Photonics Research InstituteAISTIbaraki kenJapan

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