“Complex-shaped Metal Nanoparticles: Bottom-Up Syntheses and Applications”

Ashfield, L. J.

doi:10.1595/147106713x664617

Cited by 2 publications

(1 citation statement)

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“…The lower size limit of 1 nm approximates the diameter of single atoms and small molecules, and the upper limit of 100 nm approaches the size at which the properties become bulklike. − At the nanoscale, the quantum confinement effects become apparent; furthermore, the vast majority of the atoms conforming to these nanostructures lie at the surface, which results in a large surface to volume ratio, making it possible to tune their properties. − Nanomaterials are classified into 0D, all three dimensions within the nanoscale; 1D, two dimensions within the nanoscale; 2D, one dimension within the nanoscale; and 3D, which are more complex systems larger than the nanoscale assembled from the simpler 0D, 1D, and 2D nanomaterials. Nanomaterials can be fabricated from large bulk pieces of materials (top-down approach) using techniques such as nanolithography. − Also, they can be fabricated by assembling individual atoms or molecules (bottom-up approach) into more complex structures using self-assembly crystal growth techniques. − …”

Section: Introductionmentioning

confidence: 99%

Impact of Surface Oxidation on the Morphology of Uranium Dioxide Nanoparticles

Gonzalez,

Wang,

Batista

et al. 2023

Inorg. Chem.

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The undeniable importance of nanoparticles has led to vast efforts, in many fields of science, to understand their chemical and physical properties. In this paper, the morphology dependence of f-element nanoparticles is correlated to the oxygen environment and the type and coverage of capping ligands. This dependence was evaluated by first-principles calculations of the surface energies of different crystallographic planes (001, 110, and 111) as a function of the relative oxygen chemical potential and under the influence of different ligands. Uranium dioxide nanoparticles were the focus of this study due to their high sensitivity to oxidation compared to thorium dioxide nanoparticles, a homoleptic material but insensitive to oxidation. To fully explain the experimental observations of uranium dioxide nanocrystals, theoretical modeling shows that the consideration of surfaces with different oxidation conditions is necessary. It is shown that, for materials with low oxidation potential, such as uranium dioxide, the oxygen environment and capping ligand concentration are competing factors in determining the nanoparticle morphology.

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