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Nanoengineering Carbon Dot-Polymer Brush Interfaces for Adaptive Optical Materials.

Gozde Aktas Eken1, Nikolaos Chalmpes1, Yuming Huang2

  • 1Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA.

Angewandte Chemie (International Ed. in English)
|April 23, 2025
PubMed
Summary

We developed a new method to precisely arrange carbon dots (CDs) in thin films using polymer brushes and electron-beam lithography (EBL). This allows for tunable optical properties and advanced applications in sensing and microchips.

Keywords:
Carbon dotsElectron beam lithographyPolymer brushesTwo‐photon luminescence

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Carbon dots (CDs) exhibit unique photoluminescent properties but suffer from aggregation-induced quenching in solid-state applications.
  • Controlling the spatial organization of nanomaterials is crucial for developing advanced functional materials.
  • Polymer brushes offer a versatile platform for nanoscale fabrication and surface modification.

Purpose of the Study:

  • To create a versatile platform for fabricating two-photon excitable carbon dot-based nanocomposite thin films.
  • To precisely organize carbon dots (CDs) at the nanoscale using polymer brushes and electron-beam lithography (EBL).
  • To achieve dynamic modulation of photoluminescent properties in response to environmental stimuli.

Main Methods:

  • Fabrication of nanocomposite thin films using polymer brushes and electron-beam lithography (EBL).
  • Incorporation of pH- and thermally responsive polymers functionalized via covalent and dynamic covalent bonding.
  • Spatial organization of carbon dots (CDs) at the nanoscale.

Main Results:

  • Precise spatial organization of CDs, enabling nanoscale control over optical properties.
  • Successful mitigation of aggregation-induced quenching in solid-state carbon dot applications.
  • Demonstration of polymer brush systems as optically active, reprogrammable surfaces with tunable optical properties.

Conclusions:

  • The developed platform offers a scalable pathway for integrating advanced optical interfaces into microchip technologies, biosensing, and diagnostics.
  • This fusion of polymer brushes, carbon dots, and lithography advances the development of functional materials with nanoscale precision and stimuli-responsive properties.
  • The resulting nanoscale-engineered materials exhibit highly responsive, reconfigurable photonic behavior.