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Rational Design of 3D Morphable Color-shifting Mesosurfaces Using Bioinspired Janus Micro- and Nanolattices.

Yuejiao Wang1, Fuhua Ye2, Zhichao Fan2

  • 1Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, P.R. China.

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Summary
This summary is machine-generated.

Researchers created tunable 3D mesosurfaces with color-shifting properties inspired by diatoms. These morphable surfaces integrate Janus micro- and nanolattices for adaptive optical applications like advanced displays and sensors.

Keywords:
3D morphable mesosurfacesJanus micro‐ and nanolatticesbuckling‐guided 3D assemblyrational designvisualized mechanical sensing

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optical Engineering

Background:

  • Morphable 3D mesosurfaces with tunable optical properties are crucial for advanced systems.
  • Challenges exist in integrating nanoscale optical features onto curved 3D surfaces due to scale mismatches and material limits.
  • Existing 3D assembly methods for color-shifting mesosurfaces rarely explore synergetic control of optical performance and 3D shape.

Purpose of the Study:

  • To propose novel design strategies for 3D morphable color-shifting mesosurfaces using engineered Janus micro- and nanolattices.
  • To enable synergetic design and control of optical properties and complex 3D shapes.
  • To demonstrate potential applications in adaptive systems.

Main Methods:

  • Inspired by diatom cell walls, novel Janus micro- and nanolattices were designed.
  • A double-sided patterning method combining lithography and nanomolding integrated lattices onto 2D precursors.
  • Buckling-guided 3D assembly transformed 2D structures into 3D mesosurfaces.
  • Theoretical mechanics and reflectance spectra guided the design of optical and mechanical properties.

Main Results:

  • Precisely integrated Janus lattices onto thin-film precursors.
  • Achieved transformation into target 3D mesosurfaces via buckling-guided assembly.
  • Demonstrated customizable 3D optical mesosurfaces with desired shapes and reflectance distributions.
  • Showcased morphable ribbon surfaces with gradual color changes under mechanical deformation (stretching and compression).

Conclusions:

  • The proposed strategy enables the fabrication of 3D morphable color-shifting mesosurfaces with tunable optical properties and complex shapes.
  • The developed surfaces exhibit potential for power-free, visual-based strain and pressure sensing.
  • This work opens avenues for multifunctional adaptive systems like next-generation displays and intelligent camouflage.