2022/01/18 by Klaus Hermann, Hermann, Klaus E.
Environmental Science · Materials Science · #Atomic and Molecular Clusters (physics.atm-clus) #Chemical Physics (physics.chem-ph) #Coagulation and Flocculation Studies #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Nanocluster Synthesis and Applications
paper · pdf · doi:10.48550/arxiv.2201.07038
openalex publication_date 2022/01/18 · openalex created_date 2022/04/03 · openalex updated_date 2026/07/28
We examine the structure of compact metal nanoparticles (NPs) forming polyhedral sections of face centered (fcc) and body centered (bcc) cubic lattices, which are confined by facets characterized by highly dense 100, 110, and 111 monolayers. Together with the constraint that the NPs exhibit the same point symmetry as the ideal cubic lattice, i.e. Oh, different types of generic NPs serve for the definition of general compact polyhedral cubic NPs. Their structural properties, such as shape, size, and surface facets, can be described by only three integer valued polyhedral NP parameters N, M, K. Corresponding analytical details are discussed with visualization of characteristic examples. While the overall NP shapes are quite similar between the different cubic lattice types, structural fine details differ. In particular, monolayer planes of adjacent NP facets can join at corners and edges which are not occupied by atoms of the ideal lattice. This gives rise to microfacets and narrow facet strips depending on the lattice type. The discussion illustrates the complexity of seemingly simple nanoparticles in a quantitative account. The geometric relationships of the model particles can also be used to classify shapes and estimate sizes of real compact metal nanoparticles observed by experiment.