In this talk, we examine how nanostructured assemblies can be used to control fundamental physical processes, and how those processes can find practical applications in fields ranging from solar energy harvesting, to electrochemical energy storage and electro-catalysis, to nanomagnetics. We begin with assemblies of organic molecules that could find application in organic photovoltaics. Here we examine how amphiphilic assembly can be used to create well defined arrays or conjugated organic molecules (semiconducting polymers and fullerenes) that rapidly separate charge carriers upon photoexcitation and keep those carriers separated for extended periods of time. We then move to inorganic nanostructures and examine how architectural control can be used to enhance rate capabilities in battery systems and efficiency in electrocatalysts. In these systems, the challenge is to create assemblies that combine porosity for solvent diffusion, optimized composition, and electrical conductivity so that redox reactions are not limited by diffusion constraints. We will specifically focus on new oxide and sulfide materials for fast electrochemical energy storage, and Ni/Fe based materials for the water splitting oxygen evolution reaction. Finally, if time permits, we will examine how FePd metal nanocrystals can be used as ultra-low energy magnetic recording bits by taking advantage of voltage controlled magnetic anisotropy. This diverse set of topics is inspired by Mostafa El-Sayed, who combines nanoscale materials, fundamental spectroscopic studies, and practical materials advances.

Using nanostructured assemblies to control fundamental physical processes: From energy harvesting and storage to nanomagentics

251st National Meeting (2016)

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