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A light-driven three-dimensional plasmonic nanosystem that translates molecular motion into reversible chiroptical

Anton Kuzyk1, Yangyang Yang2,3, Xiaoyang Duan1,4

  • 1Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, D-70569 Stuttgart, Germany.

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Area of Science:

  • Nanotechnology
  • Molecular Engineering
  • Biomimetic Systems

Background:

  • Nature utilizes light-powered proteins (e.g., bacteriorhodopsin) for energy conversion.
  • Synthetic molecular machines often operate at the nanoscale, limiting practical applications.
  • Scaling molecular machine operation to the 10-100 nm range is a significant challenge.

Purpose of the Study:

  • To create a synthetic light-driven system capable of amplifying molecular motion.
  • To translate nanoscale molecular motion into macroscopic chiroptical functions.
  • To develop a versatile platform for all-optical molecular devices.

Main Methods:

  • Design and fabrication of a light-driven plasmonic nanosystem.
  • Utilizing azobenzene molecules for light-induced conformational changes.
  • Employing host nanostructures to amplify molecular motion.
  • Characterizing the resulting chiroptical properties and modulation.

Main Results:

  • Demonstrated a light-driven plasmonic nanosystem that amplifies molecular motion.
  • Achieved reversible chiroptical function with large amplitude modulation.
  • Showcased optical addressability, reversibility, and modulability of the nanosystem.

Conclusions:

  • The developed plasmonic nanosystem effectively translates amplified molecular motion into functional chiroptical properties.
  • This system offers a promising route towards practical, all-optical molecular devices.
  • Light serves as both an energy source and an information probe in this advanced nanosystem.