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Near-Infrared-Detached Adhesion Enabled by Upconverting Nanoparticles.

Mingyue Jiang1, Xue Liu1, Zhijun Chen1

  • 1Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Hexing Road 26, Harbin 150040, P.R. China.

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Summary

This study introduces near-infrared (NIR) light-detachable topological adhesion using upconverting nanoparticles (UCNP@PAA) and Cell-Fe. This method enables biocompatible detachment of wet materials, even in deep tissues.

Keywords:
BiomaterialsNanoparticlesOptical Materials

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Area of Science:

  • Biomaterials Science
  • Adhesion Science
  • Nanotechnology

Background:

  • Detachment of adhered wet materials like tissues and hydrogels is challenging.
  • Current photodetachable adhesion uses UV light, which has poor biocompatibility and limited tissue penetration.
  • Developing biocompatible and deep-penetrating detachment methods is crucial for biomedical applications.

Purpose of the Study:

  • To develop a novel near-infrared (NIR) light-triggered photodetachable topological adhesion system.
  • To overcome the limitations of UV-based photodetachment in terms of biocompatibility and penetration depth.
  • To enable efficient and gentle detachment of adhered wet materials for potential in-vivo applications.

Main Methods:

  • Synthesized polyacrylic acid coated upconverting nanoparticles (UCNP@PAA).
  • Developed a photodetachable adhesive (Cell-Fe) using carboxymethylcellulose and Fe³⁺.
  • Combined UCNP@PAA and Cell-Fe to create a substrate for NIR-triggered detachment.
  • Utilized NIR light to activate UCNP@PAA, generating UV light for Cell-Fe decomposition.

Main Results:

  • Successfully demonstrated NIR light-induced detachment of topological adhesion.
  • The UCNP@PAA effectively converted NIR light to UV light, triggering Cell-Fe decomposition.
  • The developed system showed feasibility for detachment in deep tissue models due to NIR penetration.
  • Achieved efficient and biocompatible detachment without damaging the adhered materials.

Conclusions:

  • Near-infrared (NIR) light-detached topological adhesion offers a promising solution for biocompatible material detachment.
  • This technology overcomes UV light limitations, enabling applications in deep tissues.
  • The UCNP@PAA and Cell-Fe system provides a versatile platform for controlled adhesion and detachment in biomedical engineering.