Continuous phase transformation in nanocube assemblies.

Phys Rev Lett

Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.

Published: September 2011

The phase behavior of 3D assemblies of nanocubes in a ligand-rich solution upon solvent evaporation was experimentally investigated using small-angle x-ray scattering and electron microscopy. We observed a continuous transformation of assemblies between simple cubic and rhombohedral phases, where a variable angle of rhombohedral structure is determined by ligand thickness. We established a quantitative relationship between the particle shape evolution from cubes to quasispheres and the lattice distortion during the transformation, with a pathway exhibiting the highest known packing.

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http://dx.doi.org/10.1103/PhysRevLett.107.135701DOI Listing

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