Open AccessOrientationally Ordered Silicon Nanocrystal Cuboctahedra in Superlattices
Author(s) -
Yixuan Yu,
Xiufen Lu,
Adrien Guillaussier,
Vikas Reddy Voggu,
William D. Piñeros,
Marı́a de la Mata,
Jordi Arbiol,
DetlefM. Smilgies,
Thomas M. Truskett,
Brian A. Korgel
Publication year - 2016
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/acs.nanolett.6b04006
Subject(s) - superlattice , nanocrystal , materials science , transmission electron microscopy , substrate (aquarium) , crystallography , silicon , scattering , electron diffraction , diffraction , condensed matter physics , nanotechnology , chemistry , optics , optoelectronics , physics , oceanography , geology
Uniform silicon nanocrystals were synthesized with cuboctahedral shape and passivated with 1-dodecene capping ligands. Transmission electron microscopy, electron diffraction, and grazing incidence wide-angle and small-angle X-ray scattering show that these soft cuboctahedra assemble into face-centered cubic superlattices with orientational order. The preferred nanocrystal orientation was found to depend on the orientation of the superlattices on the substrate, indicating that the interactions with the substrate and assembly kinetics can influence the orientation of faceted nanocrystals in superlattices.