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Related Experiment Videos

Peptide-assembled optically responsive nanoparticle complexes.

Joseph M Slocik1, Felicia Tam, Naomi J Halas

  • 1Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7702, USA.

Nano Letters
|March 24, 2007
PubMed
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Researchers created active nanostructures using gold nanoshells and quantum dots. Near-infrared light remotely controlled their properties, enabling reversible assembly or modulated quantum dot fluorescence for advanced nanoscience applications.

Area of Science:

  • Nanoscience
  • Materials Science
  • Biomolecular Engineering

Background:

  • Designing active nanostructures with remotely controllable properties is a key challenge.
  • Photothermally responsive plasmonic nanoparticles offer potential for light-actuated systems.
  • Thermally labile biomolecular linkers can mediate nanoparticle assembly and disassembly.

Purpose of the Study:

  • To develop active nanoparticle complexes with properties modulated by near-infrared (NIR) light.
  • To investigate the assembly and disassembly dynamics of gold nanoshell (NS) and quantum dot (QD) complexes.
  • To explore the impact of NIR illumination on the fluorescence of NS-QD complexes.

Main Methods:

  • Assembly of gold nanoshells (NS) and quantum dots (QD) using coiled-coil peptides.

Related Experiment Videos

  • Formation of NS-NS and NS-QD complexes.
  • Remote control of nanostructure properties via near-infrared illumination.

    • Main Results:

    • NS-NS complexes exhibited reversible disassembly and reassembly upon NIR illumination.
    • NS-QD complexes showed significant and reproducible modulation of quantum dot fluorescence.
    • The modulation of QD fluorescence in NS-QD complexes occurred without disassembly of the nanoparticle-peptide structure.

    Conclusions:

    • NIR-responsive active nanostructures can be designed using plasmonic nanoparticles and peptide linkers.
    • These systems offer tunable control over nanoparticle complex dynamics and optical properties.
    • The developed NS-QD complexes demonstrate a promising platform for light-controlled fluorescence modulation.