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Thermal-Assisted Multiscale Patterning of Nonplanar Colloidal Nanostructures for Multi-Modal Anti-Counterfeiting.

Dan Su1,2,3, Wei-Long Wu1, Pan-Qin Sun1

  • 1Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|October 22, 2023
PubMed
Summary
This summary is machine-generated.

A new thermal-assisted nanostructure transfer printing method significantly improves the efficiency of patterning polystyrene nanospheres on nonplanar surfaces. This technique enables precise multiscale patterning for advanced applications like anti-counterfeiting.

Keywords:
multi-modal anti-counterfeitingmultiscale patterningnano transfer printingnon-planar colloidal nanostructuresself-assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Engineering

Background:

  • Nanotransfer printing is crucial for fabricating functional materials but struggles with nonplanar nanostructures due to poor adhesion.
  • Achieving efficient and ordered patterning of nanostructures on curved surfaces remains a significant challenge.

Purpose of the Study:

  • To develop a thermal-assisted nonplanar nanostructure transfer printing (NP-NTP) strategy for improved patterning efficiency and order.
  • To investigate the mechanism behind enhanced printing efficiency at elevated temperatures.
  • To demonstrate the versatility of NP-NTP for multiscale patterning and anti-counterfeiting applications.

Main Methods:

  • Utilized thermal-assisted nonplanar nanostructure transfer printing (NP-NTP) for polystyrene (PS) nanospheres.
  • Investigated printing efficiency across a range of temperatures, particularly around the glass transition temperature of PS.
  • Combined NP-NTP with intaglio transfer printing for micro- and macroscale patterning.

Main Results:

  • Achieved a significant increase in printing efficiency from ≈3.1% to ≈97.2% by operating below the glass transition temperature of PS.
  • Observed a transition from disordered to long-range ordered arrangement of nanospheres.
  • Demonstrated successful multiscale patterning (micro- to macroscale) with high resolution (≈2757 PPI) on a 4-inch scale.

Conclusions:

  • The NP-NTP strategy effectively overcomes adhesion challenges in nonplanar nanostructure patterning.
  • The enhanced efficiency is attributed to reduced Young's modulus, increased contact area, self-adhesion, and inter-particle necking.
  • The developed technique offers a new paradigm for integrating multiscale nanostructure patterning into functional devices, including multi-modal anti-counterfeiting solutions.