Deformable mechanoelectric generators based on electretized alkyl-π molecular liquids Takashi Nakanishi MANA, National Institute for Materials Science, Japan Energy harvesting systems with lightweight, small size, excellent stretchability/deformability, as well as a large and stable power generation would be ideal wearable soft electronic devices applicable for future remote medical systems, healthcare, and robotics applications. For these demands, liquid electrets which possess high deformability, excellent processability, and maintain trapped electrostatic charges in the liquids can be the potential substances. Liquid electrets in which π-conjugated molecular/polymer units are wrapped with bulky yet flexible branched-alkyl chains were developed. Interestingly, electrostatic charges are trapped and retained in the liquid. Stretchable/deformable mechanoelectric generators capable of being stretched up to 300% were constructed with those liquid electrets. In addition, the device could adapt the frequencies in the range of the human body motion below 50 Hz. References 1. A. Ghosh et al., Nature Commun. , 10 , 4210 (2019). 2. A. Shinohara, M. Yoshida, C. Pan, T. Nakanishi, Polym. J. , 55 , 529-535 (2023). 3. R. K. Gupta, M. Yoshida, A. Saeki, Z. Guo, T. Nakanishi, Mater. Horiz. , in press (2023), DOI: 10.1039/D3MH00485F. 4. A. Tateyama, T. Nakanishi, Responsive Mater. , in press (2023), DOI: 10.1002/rpm.20230001.
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