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Hydrogen Bonding Directed Colloidal Self‐Assembly of Nanoparticles into 2D Crystals, Capsids, and Supracolloidal Assemblies
Author(s) -
Ikkala Olli
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201704328
Subject(s) - materials science , self assembly , nanotechnology , nanoparticle , nanoclusters , dispersity , colloid , supramolecular chemistry , colloidal crystal , monolayer , nanoscopic scale , chemical engineering , crystallography , crystal structure , polymer chemistry , chemistry , engineering
Self‐assembly of colloidal building blocks, like metal nanoparticles, is a rapidly progressing research area toward new functional materials. However, in‐depth control of the colloidal self‐assembly and especially hierarchical self‐assembly is difficult due to challenges in controlling the size dispersities, shape/morphology, directionalities, and aggregation tendencies. Using either polydispersed or narrow‐size dispersed nanoparticles, considerable progress has been achieved over the past few years. However, absolutely monodisperse nanoparticles could allow new options for rational designs of self‐assemblies. Therein, atomically precise monolayer protected nanoclusters ( d < 3 nm) have recently been synthesized with well‐defined metal cores and surface ligands. Their dispersion behavior is commonly tuned by surfactant‐like ligands. Beyond that, this study deals with approaches based on ligand‐driven supramolecular interactions and colloidal monodispersity until atomic precision to tune the colloidal self‐assembly and hierarchy from nanoscale to mesoscopic scale. Therein colloidal packing to self‐assembled 2D crystals and closed virus capsid‐inspired shells provide relevant research goals due to ever increasing potential of 2D materials and encapsulation. This study addresses the hydrogen bonding (H‐bonding) directed self‐assembly of atomically precise gold and silver nanoparticles and narrow size dispersed cobalt nanoparticles to free‐standing 2D colloidal nanosheets, nanowire assemblies, capsid‐like colloidal closed shells, as well as higher order structures.