An iontronic flexible pressure sensor based on a multistage gradient micro-dome structure with a broad sensing range for wearable devices

Abstract

In recent years, despite the extensive evolution of capacitive flexible pressure sensors, conventional capacitive pressure sensors are constrained by structural hardening, resulting in a limited pressure-response range. Here, an iontronic flexible pressure sensor based on a multistage gradient micro-dome structure was reported. The multistage gradient structure not only enhances the compressibility of the device, but also reduces the initial contact area. In addition, the sensor uses AgNWs as electrode materials to ensure that excellent electrical conductivity is maintained over a certain strain range, while polyvinyl alcohol and [BMIM]BF4 are employed as ionic layers to improve the performance of the ionic materials. The sensor achieves a maximum sensitivity of 8.1 kPa−1 within a pressure range of 2.1 Pa–600 kPa, and a fast response/recovery time of 25/20 ms. Moreover, it repeats compression/release 3000 times at a pressure of 26 kPa without significant signal drift. The sensor can identify different sitting positions and monitor laryngeal activity in wearable devices with strong repeatability and dynamic response recovery, enabling users to adjust incorrect sitting postures in a timely manner.

Graphical abstract: An iontronic flexible pressure sensor based on a multistage gradient micro-dome structure with a broad sensing range for wearable devices

Supplementary files

Article information

Article type
Paper
Submitted
19 Leq 2024
Accepted
16 Way 2024
First published
08 Dit 2024

J. Mater. Chem. C, 2024, Advance Article

An iontronic flexible pressure sensor based on a multistage gradient micro-dome structure with a broad sensing range for wearable devices

H. Zhang, D. Yang, Q. Long, Z. Yan, H. Zhang, T. Zhang, Y. He, X. He, W. Hong, Y. Zhao and X. Guo, J. Mater. Chem. C, 2024, Advance Article , DOI: 10.1039/D4TC03538K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements