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Area of Science:

  • Colloidal science
  • Materials science
  • Nanotechnology

Background:

  • Colloidal self-assembly is challenging for creating multiple, transformable suprastructures from single particles in one solvent.
  • Janus nanoparticles (JNPs) offer unique properties due to their distinct surface domains.

Purpose of the Study:

  • To investigate the self-assembly behavior of novel snowman-shaped amphiphilic Janus nanoparticles (JNPs).
  • To explore the diversity and transformability of suprastructures formed by these JNPs.

Main Methods:

  • Design and synthesis of snowman-shaped amphiphilic JNPs with deformable and rigid lobes.
  • Kinetic manipulation of self-assembly conditions in a monophasic solvent.
  • Characterization of formed suprastructures using microscopy and other relevant techniques.

Main Results:

  • JNPs self-assembled into a variety of distinct suprastructures: micelles, worms, mini-capsules, giant- and elongated-vesicles.
  • Suprastructures ranged from 500-nanometers to 30-μm, composed of 4 to thousands of highly oriented JNPs.
  • Demonstrated transformability between different suprastructures and disassembly into individual particles.

Conclusions:

  • Snowman-shaped JNPs enable rich suprastructural diversity and transformability, mimicking amphiphilic molecule behavior.
  • Kinetic control is key to achieving varied self-assembled architectures from a single JNP type.
  • This work advances colloidal self-assembly, offering a platform for novel functional materials.