Abstract
The structural design of sensing active layers plays a critical role in the development of electromechanical sensors. In this study, we established an innovative concept for constructing sensors, pre-straining & laser reduction (PS&LR), based on a laser-induced wrinkle effect. This method combines and highlights the advantages of a wrinkled structure in the flexibility of sensors and the advantages of laser in the efficient reduction of GO; thus, it can efficiently introduce tunable, stretchable 3D-rGO expansion bulges in wrinkled GO films. Particularly, the sensors based on this special structure (1.5 cm × 3 cm) demonstrated a multi-functional and distinguished sensing ability in the cases of bending, stretching and touching modes. Moreover, the 3D-rGO architecture endowed the sensors with great sensitivity and design flexibility, i.e., a high sensing factor of 122, relative current value change of 60 times at the bending angle of 60°, decreased relative resistance–strain curve and diverse bending strategies for various detection purposes. Thus, the established design and preparation strategy provides large design flexibility for various promising applications.
Highlights
Wearable electronic devices used in the human body mainly focus on electro-mechanical conversion.[1]
The signi cant functional advantages of smart wearable devices have become the focus of attention, among which multi-functional design has become an important strategy to ease the burden on participants in the medical service.[6,7,8,9]
Graphene oxide (GO), which is the derivative of graphene, has fascinating properties for a functional design
Summary
Wearable electronic devices used in the human body mainly focus on electro-mechanical conversion.[1]. The prepared lms possessed a special 3D microstructure, which enables different types of sensing devices to be fabricated, namely, sensors responsive to bending, pressure, and tensile responses.
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