Remote Spatiotemporal Control of a Magnetic and Electroconductive Hydrogel Network via Magnetic Fields for Soft Electronic Applications

Multifunctional hydrogels are a class of materials offering new opportunities for interfacing living organisms with machines due to their mechanical compliance, biocompatibility, and capacity be triggered by external stimuli. Here, we report dual magnetic- electric-stimuli-responsive hydrogel the disassembled reassembled up three times through reversible cross-links. This allows its use as an electronic device (e.g., temperature sensor) in cross-linked state spatiotemporal control narrow channels via application magnetic fields, followed reassembly. The consists interpenetrated polymer network alginate (Alg) poly(3,4-ethylenedioxythiophene) (PEDOT), which imparts electrical properties, respectively. In addition, incorporation magnetite nanoparticles (Fe3O4 NPs) endows properties. After structural, (electro)chemical, physical characterization, successfully performed dynamic continuous transport disassembly, transporting polymer–Fe3O4 NP aggregates toward target using fields final reassembly recover multifunctional state. We also tested PEDOT/Alg/Fe3O4 sensing hyperthermia after various disassembly/re-cross-linking cycles. present methodology can pave way generation soft devices remotely transported.