Angew: MXene based sensitive humidity driven actuator

MXene is a new type of two-dimensional material with hydrophilicity and high conductivity, showing good application prospects in smart electronic devices. However, the humidity driving ability of MXene similar to graphene oxide is still unknown.

Achievements

Recently, Dr. Fan Zhimin, a young teacher of Harbin Institute of Technology , published a paper titled " Highly Conductive MXene Film Actuator Based on Moisture Gradients " in the international top journal Angewandte Chemie International Edition . Here, a high-conductivity MXene thin film driver triggered by a moisture gradient is reported , and the driving mechanism is revealed. The drive is highly sensitive to moisture and has a large amount of deformation. When the relative humidity difference is 65% , the maximum bending angle can reach 155 ° . Various analysis methods show that the humidity driving and large deformation are caused by the asymmetric expansion of the double-layer structure formed in situ. The excellent deformability and outstanding conductivity make it suitable for flexible chisels, electrical switches and other fields, which is difficult to achieve directly by other two-dimensional materials. More importantly, this work further expands the new application range of MXene materials and provides new opportunities for building next-generation high-conductivity smart drivers.

Figure  1 Schematic diagram of  MXene film preparation.

Figure  2 Rapid deformation of  MXene film.

Figure  3  Deformation graph of MXene thin film driver with time and humidity.

Figure  4  Deformation mechanism of MXene thin-film driver.

in conclusion

In summary, a high-conductivity MXene thin-film driver was prepared through a moisture gradient . When the relative humidity difference is 65% , the maximum bending angle can reach 155 ° . The excellent deformability and outstanding conductivity make it suitable for flexible chisels, electrical switches and other fields, which is difficult to achieve directly by other two-dimensional materials. This work reveals the driving mechanism of high-electricity MXene thin film, further expands the application field of MXene and provides theoretical basis and technical support, which provides a high degree of protection for the design and manufacture of the next generation of highly conductive intelligent drivers.

Original link:

https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202003737

Source of information: MXene Academic