Jun Zhang1, Zhiping Luo2, Zewei Quan1, Welley Loc1, Yuxuan Wang1, Zhongwu Wang3, Detlef-M. Smilgies3 and
1Dept. of Chemistry and MSE Program, State University of New York at Binghamton, Binghamton, NY
2Microscopy and Imaging Center, Texas A&M University, College Station, TX
3Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY
A structural study on self-assembled superlattices of Pt3Ni nano-octahedra and PbS nanocubes is presented. The shape-controlled building blocks were synthesized through a wet-chemical approach and their morphologies were well characterized. Structure-defined superlattices of these high-quality nanocrystals were subsequently prepared, respectively. The superlattices were investigated using several techniques including transmission electron microscopic tomography, grazing-incidence small-angle X-ray scattering method as well as synchrotron X-ray diffraction. The packing structure in each superlattice system was determined and is discussed.