Synthesis of Inorganic Nanocomposites by Selective Introduction of Metal Complexes into a Self‐Assembled Block Copolymer Template

Abstract

Inorganic nanocomposites have characteristic structures that feature expanded interfaces, quantum effects, and resistance to crack propagation. These structures are promising for the improvement of many materials including thermoelectric materials, photocatalysts, and structural materials. Precise control of the inorganic nanocomposites’ morphology, size, and chemical composition is very important for these applications. Here, we present a novel fabrication method to control the structures of inorganic nanocomposites by means of a self-assembled block copolymer template. Different metal complexes were selectively introduced into specific polymer blocks of the block copolymer, and subsequent removal of the block copolymer template by oxygen plasma treatment produced hexagonally packed porous structures. In contrast, calcination removal of the block copolymer template yielded nanocomposites consisting of metallic spheres in a matrix of a metal oxide. These results demonstrate that different nanostructures can be created by selective use of processes to remove the block copolymer templates. The simple process of first mixing block copolymers and magnetic nanomaterial precursors and then subsequently removing the block copolymer template enables structural control of magnetic nanomaterials, which will facilitate their applicability in patterned media, including next-generation perpendicular magnetic recording media.

Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes

“…Supramolecular self-assembly is a key approach for the design and development of nanostructured systems and has become a fundamental method for the formation of advanced nanomaterials. This strategy focuses on different types of interacting (and communicating) building blocks to perform preprogrammed advanced functions [133][134][135][136]. The novel structures and properties obtained by the efficient use of noncovalent forces (and structure directing interactions) provide additional flexibility for the design and development of versatile smart materials [137][138][139], biomaterials [140][141][142], and functional nanodevices [143][144][145].…”