Continuous phase transformation in nanocube assemblies
Zhang, Y., Lu, F., van der Lelie, D., & Gang, O. (2011). Continuous phase transformation in nanocube assemblies. Physical Review Letters, 107(13), 135701. DOI: 10.1103/PhysRevLett.107.135701
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.