Abstract
Based on the advantages and broad applications of stretchable strain sensors, this study reports a simple method to fabricate a highly sensitive strain sensor with Ag nanomaterials-polydimethylsiloxane (AgNMs-PDMS) to create a synergic conductive network and a sandwich-structure. Three Ag nanomaterial samples were synthesized by controlling the concentrations of the FeCl3 solution and reaction time via the heat polyols thermal method. The AgNMs network’s elastomer nanocomposite-based strain sensors show strong piezoresistivity with a high gauge factor of 547.8 and stretchability from 0.81% to 7.26%. The application of our high-performance strain sensors was demonstrated by the inducting finger of the motion detection. These highly sensitive sensors conform to the current trends of flexible electronics and have prospects for broad application.
Highlights
In recent years, along with the progression of information science, materials science, electronic technology, and micro/ nanotechnology, flexible electronic technology is rapidly emerging as a new industry
We study highly flexible, sensitive, and reliable strain sensors based on the sandwich-structure
As compared with most reported strain sensors fabricated by depositing or embedding the sensing materials on the flexible substrates [29, 30], our sandwich-structured strain sensor can be handled by complete encapsulation
Summary
Along with the progression of information science, materials science, electronic technology, and micro/ nanotechnology, flexible electronic technology is rapidly emerging as a new industry. Due to the development of film materials and technology, flexible electronic technology has been applied to plasma display panels [1], liquid crystal displays, organic laser displays [2,3,4], solar cells [5], optical amplifiers [6], and electric pulse displays and transparent tablets [7]. Scalable, and wearable electronic devices can be installed in the clothing or directly connected to the body, designed for the flexibility of human movement with sensitive strain sensors. Piezopotentialpowered sensor devices [21] for use in e-skin and wearable applications are desirable—or even required for certain biomedical implants [22]
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