Development of highly sensitive strain sensor using area-arrayed graphene nanoribbons

Ken Suzuki, Ryohei Nakagawa, Qinqiang Zhang, Hideo Miura

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


In this study, a basic design of area-arrayed graphene nanoribbon (GNR) strain sensors was proposed to realize the next generation of strain sensors. To fabricate the area-arrayed GNRs, a top-down approach was employed, in which GNRs were cut out from a large graphene sheet using an electron beam lithography technique. GNRs with widths of 400 nm, 300 nm, 200 nm, and 50 nm were fabricated, and their current-voltage characteristics were evaluated. The current values of GNRs with widths of 200 nm and above increased linearly with increasing applied voltage, indicating that these GNRs were metallic conductors and a good ohmic junction was formed between graphene and the electrode. There were two types of GNRs with a width of 50 nm, one with a linear current–voltage relationship and the other with a nonlinear one. We evaluated the strain sensitivity of the 50 nm GNR exhibiting metallic conduction by applying a four-point bending test, and found that the gauge factor of this GNR was about 50. Thus, GNRs with a width of about 50 nm can be used to realize a highly sensitive strain sensor.

Original languageEnglish
Article number1701
Issue number7
Publication statusPublished - 2021 Jul


  • Graphene nanoribbon
  • Piezoresistivity
  • Strain sensor


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