Recently, the School of Physics (School of Microelectronics) of Zhengzhou University has made progress in the research of human-computer interaction and electronic skin, and the relevant research results have been published in the internationally renowned journal “American Chemical Society Nano” in the field of nanotechnology.
Electronic skin diagram Courtesy of Zhengzhou University
As an emerging human-computer interface, electronic skin has broad application prospects in the field of health monitoring and personal electronic devices. As an important electrode material for electronic skin, liquid metals have received widespread attention in recent years. One of the traditional methods of making liquid metal electrodes is currently to encapsulate them using polymer elastomers. However, encapsulated liquid metal electrodes are prone to leakage when stretched, and their liquid metal layers cannot be in direct contact with the skin, thereby reducing their performance when monitoring human electrophysiological signals. Another traditional method is to use a specific solvent to print liquid metal on a certain substrate surface. However, printed liquid metal electrodes are difficult to transfer and recover because they do not have a self-supporting structure, and they are prone to fracture when stretching, thereby reducing the conductivity of the electrode. Therefore, there is an urgent need to develop a liquid metal electrode with good tensile properties, self-support, and conductor exposure for electronic skin.
The study uses paper-cutting methods to develop liquid metal electrodes with three paper-cut structures: single-axis, biaxial and square spiral, which combine the advantages of self-supporting, conductor exposure, stretchable, ultra-thin and recyclable. Combining the above advantages, the authors apply it as an electronic skin to physiological electrical monitoring and intelligent human-computer interaction. This versatile electronic skin based on paper-cut structure liquid metal electrodes has the potential to be used in areas such as intelligent robots and wearable electronics. (Source: China Science Daily Chen Bin)
Related paper information:https://doi.org/10.1021/acsnano.1c11096