Topological Effect on Macromonomer Polymerization

2021 ◽  
Author(s):  
Ning Ren ◽  
Chunyang Yu ◽  
Xinyuan Zhu
Keyword(s):  
Topological Effect

scholarly journals Topological Effect on MO Energies, IX. On Topologically Related 1,4-Dibora-2,3-diazarine and 1,4-Dibora-2,5-diazarine

1984 ◽  
Vol 39 (8) ◽  
pp. 1053-1057 ◽  
Author(s):  
loan Motoc ◽  
Oskar E. Polansky
Keyword(s):  
Basis Set ◽  
Complete Agreement ◽  
Mo Calculations ◽  
Symmetry Constraint ◽  
Topological Effect ◽  
Equilibrium Geometries

AbstractMinimal STO-NG (N = 3, 4 and 6 ) basis set non-empirical HF SCF MO calculations have been performed for topologically related 1,4-dibora-2,3-diazarine (S) and 1,4-dibora-2,5-diazarine (T). The equilibrium geometries of these S and T isomers have been computed by symmetry-constraint geometry optimizations using the STO-3G basis set. The calculations lead to the prediction that: i) the T isomer is about 48 kJ/mole less stable than the S isomer, and ii) the π -MO energy patterns of the S and T isomers are in complete agreement with the TEMO theorem, while the bonding σ-MO eigenvalues exhibit four inversion points.

scholarly journals Topological effect of surface plasmon excitation in gapped isotropic topological insulator nanowires

2015 ◽  
Vol 93 (5) ◽  
pp. 591-598 ◽  
Author(s):  
Mingda Li ◽  
Wenping Cui ◽  
Lijun Wu ◽  
Qingping Meng ◽  
Yimei Zhu ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Constitutive Relations ◽  
Dielectric Constants ◽  
Red Shift ◽  
Core Diameter ◽  
Classical Perturbation Theory ◽  
Resolution Electron ◽  
Surface Plasmon Excitation ◽  
Topological Effect ◽  
The Difference

We present a theoretical investigation of the surface plasmon (SP) at the interface between a topologically nontrivial cylindrical core and a topologically trivial surrounding material, from the axion electrodynamics and modified constitutive relations. We find that the topological effect always leads to a red-shift of SP energy, while the energy red-shift decreases monotonically as core diameter decreases. A qualitative picture based on classical perturbation theory is given to explain these phenomena, from which we also infer that to enhance the shift, the difference between the inverse of dielectric constants of two materials must be increased. We also find that the surrounding magnetic environment suppresses the topological effect. All these features can be well described by a simple ansatz surface wave, which is in good agreement with full electromagnetic eigenmodes. In addition, bulk plasmon energy at ωp = 17.5 ± 0.2 eV for a semiconducting Bi2Se3 nanoparticle is observed from high-resolution electron energy loss spectrum measurements.

Drivers of Water Transport in Glass: Chemical or Topological Effect of the Glass Network?

2017 ◽  
Vol 121 (30) ◽  
pp. 16201-16215 ◽  
Author(s):  
Clémentine Mansas ◽  
Jean-Marc Delaye ◽  
Thibault Charpentier ◽  
Florence Bruguier ◽  
Olivier Bouty ◽  
...  
Keyword(s):  
Water Transport ◽  
Glass Network ◽  
Topological Effect
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