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Directed Self-Assembly of Patchy Microgels into Anisotropic Nanostructures
Jianchang Xu1, Zhikun Wang2, Fusheng Zhang1
1Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
Macromolecular Rapid Communications
|December 4, 2019
Summary
This study introduces a versatile method using patchy microgels for directed self-assembly (DSA) to create complex nanostructures. This approach enables precise control over nanoparticle architecture, advancing functional nanomaterial development.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Controllable synthesis of multi-geometry nanostructures is crucial for advanced functional nanomaterials.
- Existing methods often lack versatility in creating complex and high-order nanoscale architectures.
- Directed self-assembly (DSA) offers a promising route for precise nanomaterial fabrication.
Purpose of the Study:
- To propose a simple and versatile strategy for constructing diverse anisotropic nanostructures.
- To develop criteria for achieving controlled self-assembly of patchy microgels into various geometries.
- To explore the potential of this method for creating novel nanoparticle architectures.
Main Methods:
- Utilized directed self-assembly (DSA) of patchy microgels.
- Developed a general criterion for interaction parameters using variance analysis.
- Employed single and multi-directional DSA processes with binary microgel blends.
- Investigated the influence of recognition sites and shear rates on assembly behavior.
Main Results:
- Achieved formation of 1D nanorods via single directional DSA.
- Synthesized various 2D and 3D polymorphs (V/T/h/cross shapes, rings, nanocages) using multi-directional DSA.
- Identified optimal interaction parameters for rapid and stable nanorod formation.
- Demonstrated controlled jointing behaviors in 2D/3D assemblies and large curvature variance under shear.
Conclusions:
- Patchy microgel DSA provides a versatile platform for creating complex nanostructures.
- The number of recognition sites and shear rates effectively guide assembly modes and flexibility.
- This method offers a novel route for controllable nanoparticle architecture distinct from block copolymer self-assembly.
