An exact inversion method for extracting orientation ordering by small-angle scattering

We outline a nonparametric inversion strategy for determining the orientation distribution function (ODF) of sheared interacting rods using small-angle scattering techniques.

Interfacial assembly of nanorods: smectic alignment and multilayer stacking

Large-scale spatial arrangement and orientation ordering of nanorods assembly on substrates is critical for nanodevice fabrication. However, complicated processes and templates or surface modification of nanorods are often required. In...

Orientation Ordering and Chiral Superstructures in Fullerene Monolayer on Cd (0001)

The structure of C60 thin films grown on Cd (0001) surface has been investigated from submonolayer to second monolayer regimes with a low-temperature scanning tunneling microscopy (STM). There are different C60 domains with various misorientation angles relative to the lattice directions of Cd (0001). In the (2√3 × 2√3) R30° domain, orientational disorder of the individual C60 molecules with either pentagon, hexagon, or 6:6 bond facing up has been observed. However, orientation ordering appeared in the R26° domain such that all the C60 molecules adopt the same orientation with the 6:6 bond facing up. In particular, complex chiral motifs composed of seven C60 molecules with clockwise or anticlockwise handedness have been observed in the R4° and R8° domains, respectively. Scanning tunneling spectroscopy (STS) measurements reveal a reduced HOMO–LOMO gap of 2.1 eV for the C60 molecules adsorbed on Cd (0001) due to the substrate screening and charge transfer from Cd to C60 molecules.

Structure of [60]fullerene with a mobile lithium cation inside

The structure of crystalline [60]fullerene with a lithium cation inside (Li + @C 60 ) was determined by synchrotron radiation X-ray diffraction measurements to understand the electrostatic and thermal properties of the encapsulated Li + cation. Although the C 60 cages show severe orientation disorder in [Li + @C 60 ](TFPB − )·C 4 H 10 O and [Li + @C 60 ](TFSI − )·CH 2 Cl 2 , the Li + cations are rather ordered at specific positions by electrostatic interactions with coordinated anions outside the C 60 cage. The Li + @C 60 molecules in [Li + @C 60 ](ClO 4 − ) with a rock-salt-type cubic structure are fully disordered with almost uniform spherical shell charge densities even at 100 K by octahedral coordination of ClO 4 − tetrahedra and show no orientation ordering, unlike [Li + @C 60 ](PF 6 − ) and pristine C 60 . Single-bonded (Li + @C 60 − ) 2 dimers in [Li + @C 60 − ](NiOEP)⋅CH 2 Cl 2 are thermally stable even at 400 K and form Li + –C bonds which are shorter than Li + –C bonds in [Li + @C 60 ](PF 6 − ) and suppress the rotational motion of the Li + cations.

Epitaxial growth of silver chloride crystals on bismuth oxychloride

AgCl crystals precipitating on the surface of bismuth oxychloride crystals show orientation ordering with the (001)BiOCl||(100)AgCl.