Plasma-Induced Wrinkle-Crack Dual Structure for Robust Directional Strain Sensing in Dynamic Motion Perception.

Flexible multi-directional sensors hold vast potential for complex application scenarios, yet creating sensitive, stable, and linear strain sensors capable of flexibly detecting multi-directional strain remains a significant challenge. Here, a plasma-induced wrinkle-crack dual structure is introduced for multi-directional force detection of high-reliability flexible strain sensors. By combining pre-stretching and oxidative plasma bombardment, a multi-layer structure exhibits film stress engineering with varying elastic moduli established on the surface of the elastomer.

MXene-MWCNT Conductive Network for Long-Lasting Wearable Strain Sensors with Gesture Recognition Capabilities.

In this work, a conductive composite film composed of multi-walled carbon nanotubes (MWCNTs) and multi-layer TiCTx MXene nanosheets is used to construct a strain sensor on sandpaper Ecoflex substrate. The composite material forms a sophisticated conductive network with exceptional electrical conductivity, resulting in sensors with broad detection ranges and high sensitivities. The findings indicate that the strain sensing range of the Ecoflex/TiCTx/MWCNT strain sensor, when the mass ratio is set to 5:2, extends to 240%, with a gauge factor (GF) of 933 within the strain interval from 180% to 240%.

Directional Characteristic Enhancement of an Omnidirectional Detection Sensor Enabled by Strain Partitioning Effects in a Periodic Composite Hole Substrate.

An omnidirectional stretchable strain sensor with high resolution is a critical component for motion detection and human-machine interaction. It is the current dominant solution to integrate several consistent units into the omnidirectional sensor based on a certain geometric structure. However, the excessive similarity in orientation characteristics among sensing units restricts orientation recognition due to their closely matched strain sensitivity.