@article{BoLiuKuttichetal.2022, author = {Arixin Bo and Yawei Liu and Bj{\"o}rn Kuttich and Tobias Kraus and Asaph Widmer-Cooper and Niels de Jonge}, title = {Nanoscale Faceting and Ligand Shell Structure Dominate the Self-Assembly of Non-Polar Nanoparticles into Superlattices}, series = {Advanced materials}, volume = {34}, number = {20}, doi = {10.1002/adma.202109093}, url = {https://nbn-resolving.org/urn:nbn:de:bsz:291:415-703}, pages = {2109093}, year = {2022}, abstract = {Self-assembly of nanoscale structures at liquid-solid interfaces occurs in a broad range of industrial processes and is found in various phenomena in nature. Conventional theory assumes spherical particles and homogeneous surfaces, but that model is oversimplified, and nanoscale in-situ observations are needed for a more complete understanding. We used liquid phase scanning transmission electron microscopy (LP-STEM) to examine the interactions that direct the self-assembly of superlattices formed by gold nanoparticles (AuNPs) in non-polar liquids. Varying the molecular coating of the substrate modulated short-ranged attraction and led to switching between a range of different geometric structures including hexagonal close-packed (hcp), simple hexagonal (sh), dodecahedral quasi-crystal (dqc), and body-centered cubic (bcc) lattices, as well as random distributions. Langevin dynamics simulations explain the experimental results in terms of the interplay between nanoparticle faceting, ligand shell structure, and substrate-NP-interactions.}, language = {en} }