MXenes for Bioinspired Soft Actuators: Advancements in Angle-Independent Structural Colors and Beyond

doi:10.1007/s40820-024-01367-8

Abstract

Abstract:

Soft actuators have garnered substantial attention in current years in view of their potential appliances in diverse domains like robotics, biomedical devices, and biomimetic systems. These actuators mimic the natural movements of living organisms, aiming to attain enhanced flexibility, adaptability, and versatility. On the other hand, angle-independent structural color has been achieved through innovative design strategies and engineering approaches. By carefully controlling the size, shape, and arrangement of nanostructures, researchers have been able to create materials exhibiting consistent colors regardless of the viewing angle. One promising class of materials that holds great potential for bioinspired soft actuators is MXenes in view of their exceptional mechanical, electrical, and optical properties. The integration of MXenes for bioinspired soft actuators with angle-independent structural color offers exciting possibilities. Overcoming material compatibility issues, improving color reproducibility, scalability, durability, power supply efficiency, and cost-effectiveness will play vital roles in advancing these technologies. This perspective appraises the development of bioinspired MXene-centered soft actuators with angle-independent structural color in soft robotics.

Key words: MXenes, MXene-based composites, Bioinspired soft robotics, Angle-independent structural color

Siavash Iravani, Rajender S. Varma. MXenes for Bioinspired Soft Actuators: Advancements in Angle-Independent Structural Colors and Beyond[J]. Nano-Micro Letters, 2024, 16(1): 142-.

Siavash Iravani, Rajender S. Varma. [J]. Nano-Micro Letters, 2024, 16(1): 142-.

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URL: https://www.qk.sjtu.edu.cn/nml/EN/10.1007/s40820-024-01367-8

https://www.qk.sjtu.edu.cn/nml/EN/Y2024/V16/I1/142

Figures/Tables 1

Fig. 1 Bioinspired MXene-based soft actuators with their angle-independent structural color: A The plumage of the plum-throated cotinga exhibits angle-independent structural color in nature. B The process of fabricating MXene-centered soft actuators with angle-independent structural color is shown schematically. C A very well-aligned MXene film was created deploying a blade coating procedure, as seen in the digital photograph. D The cross-sectional scanning electron microscopy (SEM) image shows the structure of the fabricated MXene film. E, F Cross-sectional SEM images of biomimetic MXene-centered soft actuators are shown at low and high magnifications. G, H A blue gripper is designed with angle-independent structural color, enthused by the bird's claw. I, J Simulated tendrils are created with angle-independent green structural color, allowing them to twirl about tree twigs reversibly. K Imitation butterflies are developed with multiple angle-independent structural colors, and their wings flutter up and down on tree twigs upon cyclic exposure to vapors of acetone (scale bar: 0.5 cm). Reproduced with permission from ref [30]. Copyright 2022 Springer Nature, under the terms of the Creative Commons CC BY license

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