Microfabrication and characterization of spray-coated single-wall carbon nanotube film strain gauges

Dongil Lee, Hyun Pyo Hong, Chul Jin Lee, Chan Won Park, Nam Ki Min

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


We present the design, fabrication, and characterization results of single-wall carbon nanotube (SWCNT) film strain gauges for potential applications as highly sensitive strain, weight, or pressure sensors on the macro-scale. A batch microfabrication process was developed for practical device construction and packaging using spray-coated SWCNTs and a conventional semiconductor process. The prototype was characterized using a commercial metal foil gauge with tensile and compressive testing on a binocular load cell. Our test results demonstrated that the proposed SWCNT film gauges have a linear relationship between resistance changes and externally applied strain. The gauge factor ranged from 7.0 to 16.4 for four different micro-grid configurations, indicating that the maximum strain sensitivity of the prototype was approximately eight times greater than that of commercial gauges.

Original languageEnglish
Article number455301
Issue number45
Publication statusPublished - 2011 Nov 11

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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