Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Designing a nanocrystal-based temperature and strain multi-sensor with one-step inkjet printing

  • Bang, Junsung (Department of Materials Science and Engineering, Korea University) ;
  • Ahn, Junhyuk (Department of Materials Science and Engineering, Korea University) ;
  • Oh, Soong Ju (Department of Materials Science and Engineering, Korea University)
  • Received : 2021.07.12
  • Accepted : 2021.07.29
  • Published : 2021.07.31
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Abstract

Wearable multi-sensors based on nanocrystals have attracted significant attention, and studies on patterning technology to implement such multi-sensors are underway. Conventional patterning processes may affect material properties based on high temperatures and harsh chemical conditions. In this study, we developed an inkjet printing technique that can overcome these drawbacks through the application of patterning processes at room temperature and atmospheric pressure. Nanocrystal-based ink is used to adjust properties efficiently. Additionally, the viscosity and surface tension of the solvents are investigated and optimized to increase patterning performance. In the patterning process, the electrical, electrothermal, and electromechanical properties of the nanocrystal pattern are controlled by the ligand exchange process. Experimental results demonstrate that a multi-sensor with a temperature coefficient of resistance of 3.82 × 10-3 K-1 and gauge factor of 30.6 can be successfully fabricated using one-step inkjet printing.

Keywords

Acknowledgement

This research was supported by the National Research Foundation of Korea grant funded by the Korea government (2020M3H4A1A02084898). This work was also supportted by National Research Foundation of Korea grant funded by the Korea government (2020M3H4A3081833). The manuscript was prepared through the contributions of all authors. All authors have given their approval for the final version of the manuscript.

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