Highly deformable liquid-state heterojunction sensors

Hiroki Ota, Kevin Chen, Yongjing Lin, Daisuke Kiriya, Hiroshi Shiraki, Zhibin Yu, Tae Jun Ha, Ali Javey

Research output: Contribution to journalArticlepeer-review

136 Scopus citations


Mechanically deformable devices and sensors enable conformal coverage of electronic systems on curved and soft surfaces. Sensors utilizing liquids confined in soft templates as the sensing component present the ideal platform for such applications, as liquids are inherently more deformable than solids. However, to date, liquid-based devices have been limited to metal lines based on a single-liquid component given the difficulty in the fabrication of liquid-based junctions due to intermixing. Here, we demonstrate a robust platform for the fabrication of liquid-liquid a € heterojunctiona € devices, presenting an important advancement towards the realization of liquid-state electronic systems. The device architecture and fabrication scheme we present are generic for different sensing liquids, enabling demonstration of sensors responsive to different stimuli. As a proof of concept, we demonstrate temperature, humidity and oxygen sensors by using different ionic liquids, exhibiting high sensitivity with excellent mechanical deformability arising from the inherent property of the liquid phase.

Original languageEnglish (US)
Article number5032
JournalNature communications
StatePublished - 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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