Nano Research

, Volume 8, Issue 7, pp 2242–2250 | Cite as

Scalable nanomanufacturing of surfactant-free carbon nanotube inks for spray coatings with high conductivity

  • Colin Preston
  • Da Song
  • Jaiqi Dai
  • Zois Tsinas
  • John Bavier
  • John Cumings
  • Vince Ballarotto
  • Liangbing Hu
Research Article

Abstract

Spray-coated carbon nanotube films offer a simple and printable solution for fabricating low cost, lightweight, and flexible thin-film electronics. However, current nanotube spray inks require either a disruptive surfactant or destructive surface functionalization to stabilize dispersions at the cost of the electrical properties of the deposited film. We demonstrate that high-purity few-walled carbon nanotubes may be stabilized in isopropanol after surface functionalization and that optimizing the ink stability dramatically enhances the conductivity of subsequent spray-coated thin films. We consequently report a surfactant-free carbon nanotube ink for spray-coated thin films with conductivities reaching 2,100 S/cm. Zeta-potential measurements, used to quantify the nanotube ink dispersion quality, directly demonstrate a positive correlation with the spraycoated film conductivity, which is the key metric for high-performance printed electronics.

Keywords

carbon nanotubes surfactant-free ink spray coating high conductivity zeta potential 

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Colin Preston
    • 1
  • Da Song
    • 1
  • Jaiqi Dai
    • 1
  • Zois Tsinas
    • 2
  • John Bavier
    • 3
  • John Cumings
    • 1
  • Vince Ballarotto
    • 3
  • Liangbing Hu
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of Maryland College ParkMarylandUSA
  2. 2.Department of BioengineeringUniversity of Maryland College ParkMarylandUSA
  3. 3.Laboratory for Physical SciencesCollege ParkUSA

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