Professor: Tobias Hanrath
Project Description:Understanding and controlling the assembly of colloidal nanoparticles into functional superstructures presents many scientifically interesting and technologically important research challenges. This research project builds on recent breakthroughs at Cornell that demonstrated the formation of 2D quantum dot superlattices that combine effects of quantum confinement and quantum-coupling. Its goal is to establish the fundamental processing-structure relationships for films of 2D coupled quantum dot films formed at the liquid interface within a Langmuir-Blodgett (LB) trough. To push beyond a simple empirical understanding of the processing conditions, this project will focus on preparing monolayer films of colloidal PbSe nanocrystal quantum dots while systematically adjusting growth parameters that could include surface pressure and temperature, as well as possibly assessing the impact of solvent or additive choices on nanocrystal film formation. Nanocrystal assembly and attachment involves the complex interplay of thermodynamic and kinetic parameters. New experimental capabilities provided by the LB trough will allow systematic correlation between these parameters and nanocrystal film morphology.