Tadpole-Like Flexible Microswimmers with the Head and Tail Both Magnetic

• DOI: 10.1021/acsami.3c09701
• Publication Date: 2023-08-16T14:53:14Z
• Authors: Ming You; Fangzhi Mou; Ke Wang; Jianguo Guan
• Keywords: Nanorobotics; Tadpole (physics)

In analogy to eukaryotic cells that move by beating the flagella, magnetically powered micro/nanorobots with flexible filaments are capable of eluding limitation scallop theorem generate net displacement in a three-dimensional space, but they limited complicated fabrication and low speed. Here, we demonstrate tadpole-like microswimmer head tail both magnetic developing assisted situ polymerization method. The consists magnetic-bead fixed nanochain bundle nanoparticles (tail), length stiffness can be adjusted simply changing duration strength applied field during fabrication, respectively. For under an oscillating field, generates undulatory motion, which further increased tail. induced undulation traveling wave propagating through its tail, resulting efficient propulsion microswimmer. runs at maximum motion speed when is ∼5 times diameter head, corresponding ∼half wavelength motion. microswimmers reported here promising for active sensing drug delivery, as tails designed various responsive hydrogels, results expected advance micro/nanorobots.