Hierarchical Self-Assemblies of 1D Nanoparticles in Amphiphillic Molecular Systems

Sung-Min Choi (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Techonology)

Self-assembly of 1D nanoparticles such as carbon nanotubes, metallic or semiconducting nanorods into highly ordered superstructures using amphiphillic molecular systems has been of great interest as a route toward materials with new functionalities. Amphiphillic molecules including block copolymers, surfactants, and lipids exhibit rich phase behaviors and have been extensively used as excellent templates for highly ordered nanostructured materials with various architectures. Therefore, utilization of the rich phase behavior of amphiphillic molecular systems may provide general and inexpensive ways for fabricating a large variety of self-assembled arrays of 1D nanoparticles without going through complicated preparative procedures. Recently, we have performed small angle neutron and x-ray scattering investigations to understand the cooperative self-assembling behavior of functionalized SWNTs in block copolymer, lipid, and surfactant systems, which showed that amphiphillic molecular systems can provide excellent templates for highly ordered SWNT superstructures with different symmetries. The approach investigated in these studies can be applied for other inorganic1D nanoparticles such as metallic, semiconducting or magnetic nanorods which are of great current interests.

In this talk, the current status of HANARO Neutron Facility will be briefly introduced as well.

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