Researchers performing Grazing Incident Small Angle X-ray Scattering (GISAXS) at the XSD 8-ID-E beamline at the APS are obtaining nanocomposites via the co-assembly of polymers or supramolecule and pre-synthesized NPs.
This co-assembly approach takes advantage of recent developments in colloidal particle synthesis, allowing the generation of nanocomposites containing NPs of different sizes and chemical compositions. This opens up the possibilities to develop new materials using any elements on the periodic table. The research has been published in the Journal of the American Chemical Society.
The phase behavior of the supramolecular nanocomposite thin films was systematically investigated as a function of nanoparticle (NP) loading from 1 to >50 wt%. The co-assembly of NP and supramolecule can be divided into five regimes, from a supramolecule-guided assembly to a NP governing assembly process depending on the energetic contributions from the surface energy, NP-supramolecule interaction, and the kinetic pathway of the assembly process. A range of morphologies such as 1D NP chains, 2D sheets, 3D NP assemblies and NP solids can be readily obtained, providing opportunities to meet structural control in nanocomposites for a wide range of applications.
Joseph Kao, and Ting Xu, “Nanoparticle Assemblies in Supramolecular Nanocomposite Thin Films: Concentration Dependence,” Journal of the American Chemical Society, Just Accepted Manuscript. DOI: 10.1021/jacs.5b02494, Published April 28, 2015.