Title

Symmetry-Driven Spontaneous Self-Assembly Of Nanoscale Ceria Building Blocks To Fractal Superoctahedra

Abstract

A combination of long-term aging studies and molecular dynamics (MD) simulations has been successfully used to explain the time-dependent hierarchical assembly of ceria nanoparticles (CNPs). When the CNPs were aged in as-synthesized condition at room temperature in water, it was observed that the individual 3-5 nm CNPs result in octahedral superstructures through a fractal assembly. This hierarchical fractal self-assembly was observed despite the absence of any surfactant, at room temperature, and under atmospheric pressure. High resolution transmission electron microscopy (HRTEM) and fast Fourier transform (FFT) analysis have been used to explore the assembly of the individual nanoparticles into fractal superoctahedra. Both experimental work and theoretical analysis showed that the initial octahedral and truncated octahedral seeds symmetrically assemble and result in the superoctahedra with intermediate transformation steps. © 2009 American Chemical Society.

Publication Date

3-4-2009

Publication Title

Crystal Growth and Design

Volume

9

Issue

3

Number of Pages

1614-1620

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/cg801358z

Socpus ID

65249165336 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/65249165336

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