2026-04-14T07:59:31Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3541802026-01-24T06:09:42Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Puiggalí Jou, Anna author Babeli Aguilera, Ismael author Roa Rovira, Joan Josep author Zoppe, Justin Orazio author Garcia Amoròs, Jaume author Ginebra Molins, Maria Pau author Alemán Llansó, Carlos author García Torres, José Manuel author 2021-09-01 Multifunctional hydrogels are a class of materials offering new opportunities for interfacing living organisms with machines due to their mechanical compliance, biocompatibility, and capacity to be triggered by external stimuli. Here, we report a dual magnetic- and electric-stimuli-responsive hydrogel with the capacity to be disassembled and reassembled up to three times through reversible cross-links. This allows its use as an electronic device (e.g., temperature sensor) in the cross-linked state and spatiotemporal control through narrow channels in the disassembled state via the application of magnetic fields, followed by reassembly. The hydrogel consists of an interpenetrated polymer network of alginate (Alg) and poly(3,4-ethylenedioxythiophene) (PEDOT), which imparts mechanical and electrical properties, respectively. In addition, the incorporation of magnetite nanoparticles (Fe3O4 NPs) endows the hydrogel with magnetic properties. After structural, (electro)chemical, and physical characterization, we successfully performed dynamic and continuous transport of the hydrogel through disassembly, transporting the polymer–Fe3O4 NP aggregates toward a target using magnetic fields and its final reassembly to recover the multifunctional hydrogel in the cross-linked state. We also successfully tested the PEDOT/Alg/Fe3O4 NP hydrogel for temperature sensing and magnetic hyperthermia after various disassembly/re-cross-linking cycles. The present methodology can pave the way to a new generation of soft electronic devices with the capacity to be remotely transported. Peer Reviewed Postprint (author's final draft) Àrees temàtiques de la UPC::Enginyeria dels materials Biomedical materials Conductive hydrogel Magnetite nanoparticle Spatiotemporal control Magnetic field Soft electronics Materials biomèdics Remote spatiotemporal control of a magnetic and electroconductive hydrogel network via magnetic fields for soft electronic applications