Freely suspended films in the smectic C phase are excellent templates for study of topological defect dynamics. It is well known that, during annihilation a pair disclinations with strengths +/?1, +1 moves faster because it carried towards its opponent by backflow, whereas flow vicinity ?1 negligibly small. This backflow pattern created motion itself. An experimental confirmation this theoretic...

Computational simulations of macrocycle-encapsulated single-walled carbon nanotubes (SWNTs) and C60 are reported. A molecular mechanical force field method has been used to calculate the physical properties of these complexes. The calculation shows that the macrocycle-encapsulated SWNTs and C60 are more stable than free SWNTs and C60. When macrocycles are bound to SWNTs, energetically stable we...

Making a knot on a rectangular origami or more generally on a tape of a finite length gives rise to a regular polygon. We present an automated algebraic proof that making two knots leads to a regular heptagon. Knot fold is regarded as a double fold operation coupled with Huzita’s fold operations. We specify the construction by describing the geometrical constraints on the fold lines to be used ...

A non-isolated pentagon rule metallic carbide clusterfullerene containing a heptagonal ring, Sc2C2@Cs(hept)-C88, was isolated from the raw soot obtained by electric arc vaporization of graphite rods packed with Sc2O3 and graphite powder under a helium atmosphere. The Sc2C2@Cs(hept)-C88 was purified by multistage high-performance liquid chromatography (HPLC), cocrystallized with Ni-(octaethylpor...

The atomic structure of graphene edges is critical in determining the electrical, magnetic and chemical properties of truncated graphene structures, notably nanoribbons. Unfortunately, graphene edges are typically far from ideal and suffer from atomic-scale defects, structural distortion and unintended chemical functionalization, leading to unpredictable properties. Here we report that graphene...

The cost effective synthesis and patterning of carbon nanomaterials is a challenge in electronic and energy storage devices. Here we report a one-step, scalable approach for producing and patterning porous graphene films with three-dimensional networks from commercial polymer films using a CO2 infrared laser. The sp3-carbon atoms are photothermally converted to sp2-carbon atoms by pulsed laser ...

Let (G;N) be a pair of groups. In this article, first we con-struct a relative central extension for the pair (G;N) such that specialtypes of covering pair of (G;N) are homomorphic image of it. Second, weshow that every perfect pair admits at least one covering pair. Finally,among extending some properties of perfect groups to perfect pairs, wecharacterize covering pairs of a perfect pair (G;N)...

The intrinsic defect formation in the MoNbTaVW HEA is investigated using atomic scale modelling, goal being to assess its response radiation damage possible use as plasma facing material for fusion reactors. When interstitial defects were modelled, a strong preference form split containing vanadium was observed, even forming when other elements initially placed into structure. Vacancies and Fre...

In the two-component Ginzburg-Landau theory of superfluidity, a pair fractional vortices form composite type topological defect, usually referred to as baby skyrmion. this paper, we initiate construction such skyrmion in holographic model superfluids. As result, two types configurations are found, where monopole-type one is constructed directly by solving static equations motion while dipole-ty...