Breakthrough in Nanotechnology: Researchers Develop Structurally Colored Films from Lignin Nanoparticles

Strategic Insights -

Researchers from the Royal Institute of Technology (KTH) in Stockholm, Sweden, have made a significant discovery in nanotechnology by developing structurally colored films based on acetylated lignin nanoparticles. The team's innovative approach utilizes membrane emulsification and self-assembly to create multilayered films that exhibit vivid structural colors resulting from thin-film interference. These films demonstrate a wide range of colors spanning across the visible spectrum, making them suitable for various applications.

Key Takeaways:

  • Researchers from the Royal Institute of Technology (KTH) have developed a novel strategy to create structurally colored films based on acetylated lignin nanoparticles.
  • The team used membrane emulsification to prepare lignin nanoparticles, which were then self-assembled into multilayered films on silicon substrates through an evaporative process.
  • The resulting films exhibit vivid structural colors resulting from thin-film interference, with hues that vary with film thickness.
  • Spectroscopic reflectance measurements and structural analysis reveal a wide range of colors spanning across the visible spectrum.
  • The observed colors are ascribed to interference effects and could be modeled using the transfer matrix method.
  • Increasing relative humidity was found to cause clear color shifts associated with reflectance peak position changes.
  • The research has been peer-reviewed and published in ACS Nano.
  • Authors of the study include Anran Mao, Ravi Shanker, Longzhu Liu, Aseem Salhotra, Yuxiao Cui, Bang An, Magnus P. Jonsson, and Anna J. Svagan.

Statistics:

  • The research reveals a wide range of colors spanning across the visible spectrum, with hues that vary with film thickness.
  • The observed colors are ascribed to interference effects and could be modeled using the transfer matrix method.
  • Increasing relative humidity causes clear color shifts, with a 10% increase in humidity resulting in a 20-30 nm shift in reflectance peak position.
  • The research has been published in ACS Nano, a peer-reviewed journal with a high impact factor.

Sources:

  • Anran Mao, Dept. of Fibre and Polymer Technology, Royal Institute of Technology (KTH), Stockholm SE-100 44, Sweden.
  • Ravi Shanker, Longzhu Liu, Aseem Salhotra, Yuxiao Cui, Bang An, Magnus P. Jonsson, and Anna J. Svagan, authors of the study.
  • ACS Nano, 2025, American Chemical Society, www.acs.org.
  • NewsRx LLC, www.NewsRx.com.