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 output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)307-319
Number of pages13
JournalNano Research
Issue number5
StatePublished - May 2012


  • Carbon nanotube network
  • hysteresis
  • image processing
  • mobility
  • morphology
  • thin film transistor

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • General Materials Science


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