磁化
居里温度
材料科学
磁性纳米粒子
弹性体
凝聚态物理
磁铁
转化(遗传学)
铁磁性
机器人
纳米颗粒
计算机科学
纳米技术
磁场
物理
机械工程
复合材料
化学
工程类
人工智能
量子力学
生物化学
基因
作者
Jing-Shi Tang,Bonan Sun
摘要
Magnetic soft robots are promising for diverse applications, since they can achieve multimodal locomotion through programming magnetization. However, reprogrammable magnetization of soft robots remains a challenge. Here, we prepare a magnetic elastomer containing both Fe3O4 and CrO2 particles, where Fe3O4 nanoparticles can be heated through the magnetothermal effect. Once the temperature exceeds the Curie point of CrO2 particles, the original magnetization profiles of the elastomer can be erased and re-written. We tune the magnetization profile of a one-dimensional magnetic strip to realize three shape transformation modes, and the reprogrammed magnetization profiles are validated experimentally. The magnetothermal heating process is simulated. We also demonstrate reprogrammable shape transformation of two-dimensional magnetic soft structures. Finally, a reprogrammable hand-shaped soft robot is designed and used as a magnetic switch in a LED circuit.
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