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Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release
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Programmable Anisotropic Hydrogels with Localized Photothermal/Magnetic Responsive Properties.

Hang Chen1,2, Xiaoyuan Zhang1, Li Shang3

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 21, 2022
PubMed
Summary

Researchers developed novel programmable smart materials using magnetic and photothermal stimuli. These 3D-printed hydrogel blocks can store information, like QR codes, by changing their properties with magnetic fields and light.

Keywords:
3D printingMoS2 nanosheetsdata storagehydrogelssmart materials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Smart Materials

Background:

  • Controllable fabrication of programmable smart materials is challenging.
  • Anisotropic materials offer unique responsive properties.
  • Magnetic and photothermal stimuli provide versatile control mechanisms.

Purpose of the Study:

  • To develop novel programmable anisotropic materials with magnetic and photothermal responsiveness.
  • To fabricate stimuli-responsive building blocks for advanced applications.
  • To demonstrate the programming of information storage using these materials.

Main Methods:

  • Anchoring poly(N-isopropyl acrylamide) (PNIPAm) and Fe3O4 nanoparticles onto MoS2 nanosheets.
  • Embedding functionalized nanosheets into 3D-printed hydrogel cubes.
  • Utilizing magnetic fields for orientation control and near-infrared (NIR) light for photothermal effects.

Main Results:

  • Fabricated materials exhibit dual magnetic and photothermal stimuli-responsiveness.
  • Material orientation significantly alters photothermal efficiency and optical properties.
  • Successfully programmed quick response (QR) codes using magnetic-field-assisted programming and photothermal-induced dye release.

Conclusions:

  • Developed stimuli-responsive building blocks with tunable properties.
  • Demonstrated potential for magnetic programming of hydrogels for information storage.
  • Highlighted applications in intelligent materials and precise therapy.