In nature, biological particles, such as virus capsids, are inspirational examples for hierarchical self-assembly with exceptional thermodynamic stability. They follow the principle of genetic economy, efficiency, and error-free structure formation using the concept of subunit based self-assembly. Related self-assembly concepts have been widely explored in supramolecular chemistry using molecular-level building blocks. However, a similar approach using colloidal-level building blocks such as inorganic nanoparticles has certain limitations due to challenges in controlling their size, shape, interactions, and stability. Despite tremendous progress in the field of NPs, achieving a combination of precision, reproducibility, and reliability is a formidable challenge in many branches of material science. In this presentation, we will discuss the self-assembly of atomically precise gold and silver nanoparticles into two- and three-dimensional (2D and 3D) superstructures (<b>Fig. 1</b>). Further, we will show how to extract three-dimensional details of such assemblies at near-atomic resolution using transmission electron microscopy (TEM) tomographic reconstruction. Finally, we show the application of nanoparticle superstructures in bioimaging and photocatalysis.

Two-dimensional nanoparticle assemblies with atomic-level precision

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.