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Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
Published on: November 7, 2016
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Novel Graphene Planar Architecture with Ultrahigh Stretchability and Sensitivity
Xiao You1,2,3, Jinshan Yang1,2, Mengmeng Wang1,2,3
1State Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
ACS Applied Materials & Interfaces
|April 3, 2020
Summary
A novel graphene-based planar network (GPN) offers superior stretchable strain sensing. This new structure demonstrates enhanced sensitivity and stability compared to traditional graphene-based woven fabrics (GWF).
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Graphene's unique electrical and mechanical properties make it promising for strain sensing applications.
- Developing functional macrostructures with well-defined configurations is key to optimizing graphene-based sensors.
- Traditional graphene-based woven fabric (GWF) structures have limitations in sensitivity and stability.
Purpose of the Study:
- To develop a novel graphene-based planar network (GPN) with highly stretchable strain sensing capabilities.
- To investigate the performance of GPN in terms of response sensitivity and cyclic stability.
- To analyze the resistance change mechanism and failure modes of GPN.
Main Methods:
- Direct ink writing was employed to fabricate the graphene-based planar network (GPN).
- An equivalent resistance network model was used to analyze the sensor's behavior.
- The GPN was subjected to various strain modes, including stretching in different directions, to evaluate its performance over 1000 cycles.
Main Results:
- The GPN exhibited excellent response sensitivity and cyclic stability, outperforming GWF structures.
- A significant difference in response sensitivity was observed under stretching strain in different directions (20% in horizontal, 3% in vertical after 1000 cycles).
- The observed differences were attributed to interfacial resistance at ribbon crosspoints and a transition from macro- to micro-material stretching.
Conclusions:
- The developed GPN offers a tunable and interconnected platform for advanced strain sensing.
- The GPN's controllable fabrication enables real-time monitoring of external stress distribution.
- This technology holds potential for detecting a full range of human activities and other dynamic strain applications.
