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Related Experiment Video

Updated: Jan 2, 2026

Fabrication and Operation of a Nano-Optical Conveyor Belt
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Optical nanomanipulation on solid substrates via optothermally-gated photon nudging.

Jingang Li1, Yaoran Liu1,2,3, Linhan Lin1,2

  • 1Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX, USA.

Nature Communications
|December 14, 2019
PubMed
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We developed optothermally-gated photon nudging (OPN), an all-optical technique for precise nanoscale manipulation of colloidal particles on solid substrates. This method overcomes liquid-phase limitations for advanced nanofabrication and materials science.

Area of Science:

  • Colloidal science
  • Nanotechnology
  • Optics

Background:

  • Constructing colloidal particles into functional nanostructures is challenging.
  • Existing optical techniques for particle manipulation in liquids face issues like pattern collapse and Brownian motion.
  • Reconfigurable assembly of colloidal particles remains difficult.

Purpose of the Study:

  • To develop a versatile, all-optical technique for precise manipulation and dynamic patterning of colloidal particles on solid substrates.
  • To overcome the limitations of existing liquid-phase manipulation methods.
  • To enable nanoscale accuracy in colloidal assembly.

Main Methods:

  • Developed optothermally-gated photon nudging (OPN), an all-optical technique.
  • Utilized a thin surfactant layer to optothermally modulate particle-substrate interactions.

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Last Updated: Jan 2, 2026

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  • Employed optical scattering force for particle manipulation on solid substrates.
  • Integrated in situ optical spectroscopy for real-time analysis.

    • Main Results:

    • Achieved versatile manipulation and dynamic patterning of various colloidal particles on solid substrates.
    • Demonstrated nanoscale accuracy in particle placement and assembly.
    • Successfully modulated particle-substrate interactions using optothermal effects.
    • Enabled non-invasive and contactless nanomanipulation.

    Conclusions:

    • OPN is an effective non-invasive, contactless technique for colloidal particle manipulation on solid substrates.
    • The method overcomes challenges associated with liquid-phase assembly.
    • OPN offers significant potential for applications in nanofabrication, nanophotonics, nanoelectronics, and colloidal science.