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Effect of Carbon Nanotube Network Morphology on Thin Film Transistor Performance
Nano Research (2012)
  • Marina Y. Timmermans, Aalto University
  • David Estrada, University of Illinois at Urbana-Champaign
  • Albert G. Nasibulin, Aalto University
  • Joshua D. Wood, University of Illinois at Urbana-Champaign
  • Ashkan Behnam, University of Illinois at Urbana-Champaign
  • Dong-ming Sun, Nagoya University
  • Yutaka Ohno, Nagoya University
  • Joseph W. Lyding, University of Illinois at Urbana-Champaign
  • Abdou Hassanien
  • Eric Pop, University of Illinois at Urbana-Champaign
  • Esko I. Kauppinen, Aalto University
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
Publication Date
May 1, 2012
Citation Information
Marina Y. Timmermans, David Estrada, Albert G. Nasibulin, Joshua D. Wood, et al.. "Effect of Carbon Nanotube Network Morphology on Thin Film Transistor Performance" Nano Research Vol. 5 Iss. 5 (2012)
Available at: http://works.bepress.com/david_estrada/5/