Liang Shumin, Miao Yan, Zhu Xiaoyan, Wei Jiang, Zhan Qing-Feng, Huang Xinhua, Zhang Lidong
School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, People's Republic of China.
State Key Laboratory of Precision Spectroscopy, School of Physics and Materials Science, East China Normal University, Shanghai 200241, People's Republic of China.
ACS Appl Mater Interfaces. 2021 Mar 10;13(9):11424-11432. doi: 10.1021/acsami.0c21021. Epub 2021 Mar 1.
Untethered robots with smart human-machine interactions can execute complex activities such as target cargo delivery or assembly of functional scaffolds. However, it remains challenging for fabricating microscale hollow hydrogel robots that can go with autonomous transformation of their geometric formations to adapt to unstructured environments. We herein report hydrogel-based microscopic hollow swarming spheres (HSSs) with anisotropic/isotropic alignments of FeO particles in the porous wall that can navigate under complex topography conditions by altering their geometric formation, including passing around or jumping over obstacles, assembling into various formation patterns, and swimming in a high-viscosity system. We introduce HSSs into a catalytic reaction model, in which HSSs as a catalyst can shift between water and oil phases to initiate or terminate the decomposition reaction of HO. This dynamic catalysis is expected to construct free-radical "living" polymerization for controlling the reaction rate and polymer dispersity index in the future.
具有智能人机交互功能的无系留机器人可以执行复杂的活动，如目标货物递送或功能性支架的组装。然而，制造能够自主改变几何形状以适应非结构化环境的微型中空水凝胶机器人仍然具有挑战性。我们在此报告了基于水凝胶的微观中空群聚球体（HSSs），其多孔壁中的FeO颗粒具有各向异性/各向同性排列，能够通过改变其几何形状在复杂地形条件下导航，包括绕过或跳过障碍物、组装成各种形态模式以及在高粘度系统中游泳。我们将HSSs引入催化反应模型，其中HSSs作为催化剂可以在水相和油相之间切换，以启动或终止HO的分解反应。这种动态催化有望在未来构建自由基“活性”聚合反应，以控制反应速率和聚合物分散指数。
