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A Novel Magnetic Hydrogel with Aligned Magnetic Colloidal Assemblies Showing Controllable Enhancement of Magnetothermal Effect in the Presence of Alternating Magnetic Field
Author(s) -
Hu Ke,
Sun Jianfei,
Guo Zhaobin,
Wang Peng,
Chen Qiang,
Ma Ming,
Gu Ning
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201405757
Subject(s) - materials science , magnetic field , nanotechnology , magnetic nanoparticles , anisotropy , colloid , nanoparticle , chemical engineering , physics , optics , engineering , quantum mechanics
A novel magnetic hydrogel is formed via the field‐directed assembly of magnetic nanomaterials during the gelation process. The novel magnetic hydrogel exhibits direction‐dependent thermogenesis in an alternating magnetic field. The specific absorption rate value in the direction along the assemblies can be 2.1‐fold as much as that in the direction normal to the assemblies while the heating rate is 6–8‐fold. Due to the anisotropic thermogenesis, the novel magnetic hydrogel also shows a direction‐dependent release of drugs that has a 3.4‐fold difference between the two directions.