All MoS 2 -Based Large Area, Skin-Attachable Active-Matrix Tactile Sensor

Yong Ju Park, Bhupendra K. Sharma, Sachin M. Shinde, Min Seok Kim, Bongkyun Jang, Jae Hyun Kim, Jong Hyun Ahn

Research output: Contribution to journalArticlepeer-review

142 Citations (Scopus)


Large-area, ultrathin flexible tactile sensors with conformal adherence are becoming crucial for advances in wearable electronics, electronic skins and biorobotics. However, normal passive tactile sensors suffer from high crosstalk, resulting in inaccurate sensing, which consequently limits their use in such advanced applications. Active-matrix-driven tactile sensors could potentially overcome such hurdles, but it demands the high performance and reliable operations of the thin-film-transistor array that could efficiently control integrated pressure gauges. Herein, we utilized the benefit of the semiconducting and mechanical excellence of MoS 2 and placed it between high-k Al 2 O 3 dielectric sandwich layers to achieve the high and reliable performance of MoS 2 -based back-plane circuitry and strain sensor. This strategical combination reduces the fabrication complexity and enables the demonstration of an all MoS 2 -based large area (8 × 8 array) active-matrix tactile sensor offering a wide sensing range (1-120 kPa), sensitivity value (Î"R/R 0 : 0.011 kPa -1 ), and a response time (180 ms) with excellent linearity. In addition, it showed potential in sensing multitouch accurately, tracking a stylus trajectory, and detecting the shape of an external object by grasping it using the palm of the human hand.

Original languageEnglish
Pages (from-to)3023-3030
Number of pages8
JournalACS Nano
Issue number3
Publication statusPublished - 2019 Mar 26

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) funded by the Korean government (MSIF) (2015R1A3A2066337, CASE2014-M3A6A5060933) and the internal research program of KIMM (NK218C).

Publisher Copyright:
© 2019 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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