Premium
Synthesis of Cuboctahedral CeO 2 Nanoclusters and Their Assembly into Cuboid Nanoparticles by Oriented Attachment
Author(s) -
MayaJohnson Santiago,
Gracia Lourdes,
Longo Elson,
Andres Juan,
Leite Edson R.
Publication year - 2017
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201700005
Subject(s) - nanoclusters , nanoparticle , cuboid , aminolysis , materials science , ligand (biochemistry) , nanotechnology , nanodot , destabilisation , chemical engineering , chemical physics , chemistry , organic chemistry , catalysis , geometry , engineering , psychology , social psychology , biochemistry , mathematics , receptor
Here, we describe a simple approach to control the oriented attachment process through selective ligand scavenging from the {100} facets of CeO 2 nanoclusters. Aggregates of these nanoclusters smaller than 10 nm with controlled shapes and exposed facets were obtained. For the synthesis of the cuboctahedral CeO 2 nanoclusters, we developed a solvent‐controlled synthesis approach based on a non‐hydrolytic sol–gel process and used an ester aminolysis reaction to control ligand scavenging from the {100} facets. First‐principle calculations allowed us to understand and interpret, at the atomic level, the effects of shape control on the synthesis. Fine‐tuning of the desired morphologies can be achieved by controlling the values of the surface energies, which leads to the formation of morphologies that the classic growth process does not allow.