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Related Experiment Video

Updated: Apr 26, 2026

Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Threading plasmonic nanoparticle strings with light.

Lars O Herrmann1, Ventsislav K Valev1, Christos Tserkezis2

  • 1Cavendish Laboratory, NanoPhotonics Centre, Department of Physics, University of Cambridge, JJ Thompson Avenue, Cambridge CB3 0HE, UK.

Nature Communications
|July 29, 2014
PubMed
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This summary is machine-generated.

Researchers developed a new method for large-scale nano-assembly using light. Plasmon-induced laser threading of gold nanoparticle strings creates precise, conducting nano-threads for advanced materials.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Nanomaterials are crucial for communications, energy, electronics, and sensing.
  • Light-guided self-assembly offers novel technological possibilities due to its speed and tuneability.
  • Achieving large-scale light-induced assembly of nanomaterials remains a significant challenge.

Purpose of the Study:

  • To demonstrate an efficient method for large-scale nano-assembly using light.
  • To investigate the process of plasmon-induced laser threading of gold nanoparticle strings.
  • To enable nanometre-scale tuning of optical and conducting properties of nanomaterials.

Main Methods:

  • Chemically assembling gold nanoparticles into chains with controlled separations (0.9 nm).
  • Employing plasmon-induced laser threading to re-sculpt these chains into conducting threads.

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  • Tracking the assembly process using a new near-infrared optical resonance associated with a hybrid charge transfer plasmon.

    • Main Results:

    • Successfully produced conducting nano-threads with a width of 12±2 nm.
    • Demonstrated large-scale laser-induced threading in an aqueous environment.
    • Identified that nano-thread width is tunable by chain resonances, nanoparticle size, chain length, and laser power.

    Conclusions:

    • Plasmon-induced laser threading provides an efficient route for large-scale nano-assembly.
    • This technique allows for precise control over the dimensions and properties of nanomaterial constructs.
    • The findings pave the way for novel applications in nanotechnology and materials science.