Exploring polymeric self-assembly into nanomaterials with spatiotemporal TEM

Abstract

This talk explores the self-assembly of semicrystalline block molecules into complex nanostructures using advanced spatiotemporal TEM techniques. We focus on rigid-rod flexible-coil block molecules, which form unique nanostructures like toroids, networks, and tubules due to their steric constraints. Utilizing cutting-edge spatiotemporal TEM imaging, including cryo-TEM, tomography, and in-situ liquid-phase TEM, we offer groundbreaking insights into the hierarchical assembly process. This advanced imaging reveals the intricate dynamics of nucleation, seeding, and crystal growth, fundamental to controlling material properties at the nanoscale. Our research reveals how the degree of crystallinity, dimensions, and orientations of crystalline domains influence the characteristics of resultant nanoparticles. These factors are key to tailoring materials for specific applications in fields ranging from electronics to biomedicine. Additionally, we observe electron-induced polymerization during the self-assembly of molecules with conjugated blocks, enhancing colloidal stability. This study provides insights into controlling nucleation and growth of functionalized nano- and microstructures, drawing inspiration from complex materials in nature and offering new pathways for developing versatile, functional nanomaterials.