Ultrasensitive strain sensors of multiwalled carbon nanotube/epoxy nanocomposite using dielectric loss tangent

Alamusi, W. F. Yuan, Surina, Y. Li, N. Hu, H. M. Ning, Y. L. Liu, L. K. Wu, S. Atobe, H. Fukunaga

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

In this work, the dielectric loss tangent (tan δ) of a series of strain sensors, fabricated from an epoxy nanocomposite with multi-wall carbon nanotube (MWCNT) content varying at 1 wt. % - 5 wt. %, was characterized experimentally. The effects of four parameters including frequency, strain of nanocomposite, MWCNT content, and loading voltage were investigated extensively. Moreover, an alternative current gauge factor KAC was developed. The largest value of KAC was found to be 256 for the nanocomposite strain sensor with 1 wt. % MWCNT content at 0.6% tensile strain, which indicates the ultra-sensitivity of the present strain sensor.

Original languageEnglish
Article number221903
JournalApplied Physics Letters
Volume103
Issue number22
DOIs
Publication statusPublished - 2013 Nov 25

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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