Atomic-Scale Engineering of Solid Interfaces: Towards Enhanced Electronic and Optoelectronic Functionalities

schiffrin

Dr Agustin Schiffrin, Monash University
This colloquium will be held 3 pm, 6th May, in Frank White 43-102

Electronic and optoelectronic technologies rely on the motion of electric charge in solid-state devices. Optimal performance can be achieved by engineering the electronic properties of the active materials of the device. These properties are dictated by quantum mechanical and interfacial phenomena unfolding at the nanoscale, and depend strongly on the atomic-scale morphology of the system. Controlling such atomic-scale structural properties is hence essential for the design of solid interfaces with optimal electronic and optoelectronic response, with
potential for the development of enhanced nanoelectronic, light-harvesting and light-emitting
technologies.
In the first part of my talk, I will show how supramolecular chemistry on surfaces – where organic molecules are used as building units for the assembly of well-defined low-dimensional nanostructures – offer compelling avenues for controlling the atomic-scale structural and electronic properties of solid interfaces. I will focus on 1D and 2D organic and metal-organic nanostructures, resulting from on-surface non-covalent and metal-ligand interactions between
π-conjugated molecules and transition metal adatoms.
In a second part, I will talk about how ultrashort laser pulses can be used to induce and control the ultrafast motion of charge in insulating materials. I will also briefly discuss preliminary and future experiments dealing with ultrafast photo-induced electron dynamics in photoactive supramolecular nano-assemblies on surfaces.