Columnar Self-Assembly of Colloidal Nanodisks

Abstract

The self-assembly of sterically stabilized colloidal copper sulfide nanodisks, 14-20 nm in diameter and 5-7 nm thick, was studied. The nanodisks were observed by electron microscopy and small-angle X-ray scattering to form columnar arrays when evaporated as thin films from concentrated dispersions. These superstructured nanomaterials might give rise to technologically useful properties, such as anisotropic electrical transport and electrorheological and optical properties.

Inorganic SnX‐Complex‐Induced 1D, 2D, and 3D Copper Sulfide Superstructures from Anisotropic Hexagonal Nanoplate Building Blocks

“…Therefore, we reasoned that the capping ligand (i.e., Sn À X complex), the intrinsic anisotropic structure of Cu 2 S, and van der Waals attraction had cooperative effects on the formation of the self-assembled Cu 2 S hexagonal nanoplates. [31][32][33][34] Based on the above observations and analyses, it was found that the formation of 1D arrangements was preferred as particles stacked in a face-to-face configuration by maximizing ligand-surface interactions (MLSI). Then, the high ligand density along the side of a 1D columnar arrangement could further induce well-defined 2D raftlike and 3D stratiform self-assembly ( Figure S5 in the Supporting Information).…”

Large-scale self-assembled zirconium phosphate smectic layers via a simple spray-coating process

“…The mean interlayer distance was found to be 6.4 nm. The mesoscale structure of the thin films was probed using grazing-incidence small-angle X-ray scattering (GISAXS) 30,31 . The alignment of 2D crystals can be determined by the location of the interference peaks on the x-z plane of the 2D diffractogram.…”

Ordered Gold Nanostructure Assemblies Formed By Droplet Evaporation

“…The formation of columnar superstructures has been reported for gibbsite [1] and copper sulfide platelets. [2] Beautiful iridescent liquid-crystalline phases (nematic or smectic) have been reported for suspensions of rodlike particles, including DNA, [3] viruses, [4] BaCrO 4 , [5] b-FeOOH, [6] TiO 2 , [7,8] and CdSe. [9] Semiconductor nanorods with interesting optical properties are useful for device applications (light-emitting diodes, memory devices, and solar cells), and efforts have been made to produce large-area ordered semiconductor nanorod superstructures.…”