On-command disassembly of microrobotic superstructures for transport and delivery of magnetic micromachines
Landers, Fabian C. (ETH Zürich. Institute of Robotics and Intelligent Systems)
Gantenbein, Valentin (ETH Zürich. Institute of Robotics and Intelligent Systems)
Hertle, Lukas (ETH Zürich. Institute of Robotics and Intelligent Systems)
Veciana, Andrea (ETH Zürich. Institute of Robotics and Intelligent Systems)
Llacer-Wintle, Joaquin (ETH Zürich. Institute of Robotics and Intelligent Systems)
Chen, Xiang-Zhong (Fudan University. Yiwu Research Institute)
Ye, Hao (ETH Zürich. Institute of Robotics and Intelligent Systems)
Franco, Carlos (ETH Zürich. Institute of Robotics and Intelligent Systems)
Puigmarti-Luis, Josep (Universitat de Barcelona. Institut de Química Teòrica i Computacional. Departament de Ciència dels Materials i Química Física)
Kim, Minsoo (ETH Zürich. Institute of Robotics and Intelligent Systems)
Nelson, Bradley J. (ETH Zürich. Institute of Robotics and Intelligent Systems)
Pané i Vidal, Salvador (ETH Zürich. Institute of Robotics and Intelligent Systems)

Fecha:	2023
Resumen:	Magnetic microrobots have been developed for navigating microscale environments by means of remote magnetic fields. However, limited propulsion speeds at small scales remain an issue in the maneuverability of these devices as magnetic force and torque are proportional to their magnetic volume. Here, a microrobotic superstructure is proposed, which, as analogous to a supramolecular system, consists of two or more microrobotic units that are interconnected and organized through a physical (transient) component (a polymeric frame or a thread). The superstructures consist of microfabricated magnetic helical micromachines interlocked by a magnetic gelatin nanocomposite containing iron oxide nanoparticles (IONPs). While the microhelices enable the motion of the superstructure, the IONPs serve as heating transducers for dissolving the gelatin chassis via magnetic hyperthermia. In a practical demonstration, the superstructure's motion with a gradient magnetic field in a large channel, the disassembly of the superstructure and release of the helical micromachines by a high-frequency alternating magnetic field, and the corkscrew locomotion of the released helices through a small channel via a rotating magnetic field, is showcased. This adaptable microrobotic superstructure reacts to different magnetic inputs, which can be used to perform complex delivery procedures within intricate regions of the human body.
Ayudas:	European Commission 952152 European Commission 861145 Agencia Estatal de Investigación CEX2021-001202-M Agencia Estatal de Investigación PID2020-116612RB-C33
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Magnetic hyperthermia ; Magnetic navigation ; Microrobots ; Targeted delivery ; Two-photon lithography
Publicado en:	Advanced materials, (December 2023) , art. 2310084, ISSN 1521-4095

DOI: 10.1002/adma.202310084

9 p, 4.4 MB

El registro aparece en las colecciones:
Artículos > Artículos de investigación
Artículos > Artículos publicados