A Flexible Piezoelectret Actuator/Sensor Patch for Mechanical HumanMachine Interfaces

Junwen Zhong (Corresponding Author), Yuan Ma, Yu Song, Qize Zhong, Yao Chu, Ilbey Karakurt, David B. Bogy, Liwei Lin (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

140 Citations (Scopus)


Flexible and wearable devices with the capabilities of both detecting and generating mechanical stimulations are critical for applications in humanmachine interfaces, such as augmented reality (AR) and virtual reality (VR). Herein, a flexible patch based on a sandwiched piezoelectret structure is demonstrated to have a high equivalent piezoelectric coefficient of d33 at 4050 pC/N to selectively perform either the actuating or sensing function. As an actuator, mechanical vibrations with a peak output force of more than 20 mN have been produced, similar to those from the vibration mode of a modern cell phone, and can be easily sensed by human skin. As a sensor, both the pressure detection limit of 1.84 Pa for sensing resolution and excellent stability of less than 1% variations in 6000 cycles have been achieved. The design principle together with the sensing and driving characteristics can be further developed and extended to other soft matters and flexible devices.

Original languageEnglish
Pages (from-to)7107-7116
Number of pages10
JournalACS Nano
Issue number6
Publication statusPublished - 25 Jun 2019
Externally publishedYes


  • actuator/sensor
  • dual-functional
  • human interactivity
  • piezoelectret
  • wearable electronics

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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