Yin, B.; Liu, F.; Chen, Q.; Liu, M.; Wang, F. Flexible Strain Sensors Based on Bionic Parallel Vein-like Structures for Human Motion Monitoring. Sensors2024, 24, 468.
Yin, B.; Liu, F.; Chen, Q.; Liu, M.; Wang, F. Flexible Strain Sensors Based on Bionic Parallel Vein-like Structures for Human Motion Monitoring. Sensors 2024, 24, 468.
Yin, B.; Liu, F.; Chen, Q.; Liu, M.; Wang, F. Flexible Strain Sensors Based on Bionic Parallel Vein-like Structures for Human Motion Monitoring. Sensors2024, 24, 468.
Yin, B.; Liu, F.; Chen, Q.; Liu, M.; Wang, F. Flexible Strain Sensors Based on Bionic Parallel Vein-like Structures for Human Motion Monitoring. Sensors 2024, 24, 468.
Abstract
In recent years, strain sensors have penetrated various fields. The capability of sensors to convert physical signals into electrical signals is of great importance in healthcare. However, it is still challenging to obtain sensors with high sensitivity, large operating range and low cost. In this paper, a stretchable strain sensor made of a double-layer conductive network, including a biomimetic multilayer graphene-Ecoflex (MLG-Ecoflex) substrate and a multilayer graphene-carbon nanotubes (MLG-CNTs) composite up-layer was developed. The combined action of the two layers led to an excellent performance with an operating range of up to 580% as well as a high sensitivity (gauge factor (GFmax) of 1517.94). In addition, a pressure sensor was further designed using the bionic vein-like structure with a multi-layer stacking of MLG-Ecoflex/MLG-CNTs/MLG-Ecoflex to obtain a relatively high deformation along the direction of thickness. The device presented a high sensing performance (up to sensitivity of 0.433 kPa-1), capable of monitoring small movements of the human body such as vocalisations and gestures. The good performance of the sensors together with a simple fabrication procedure (flip-molding) make it potential for some applications, for example, human health monitoring and other areas of human interaction.
Keywords
microstructure; flexible strain sensors; stretching; human motion; pressure-sensitive sensors
Subject
Engineering, Industrial and Manufacturing Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
