Quasi-2d fluids of dipolar superballs in an external field

Soft Matter ◽  
2015 ◽  
Vol 11 (19) ◽  
pp. 3900-3912 ◽  
Author(s):  
Per Linse
Keyword(s):  
Dipole Moment ◽  
External Field ◽  
Principal Axis ◽  
Horizontal Direction ◽  
Principal Axis System

(Top) Dipolar superballs with dipole moment in 001, 011, and 111-direction and (bottom) structure in quasi-2d fluids with an external field in the horizontal direction. The degree of attraction between strings depends and the structures formed depends decisively on the direction of the dipole in the principal axis system of the superballs.

Molecular Structure, Quadrupole Coupling Tensor and Dipole Moment of Ethyl Cyanide

1974 ◽  
Vol 29 (9) ◽  
pp. 1345-1355 ◽  
Author(s):  
H. M. Heise ◽  
H. Lutz ◽  
H. Dreizler
Keyword(s):  
Dipole Moment ◽  
Stark Effect ◽  
Principal Axis ◽  
Coupling Constants ◽  
Coupling Tensor ◽  
Principal Axes ◽  
Quadrupole Coupling ◽  
Principal Axis System ◽  
Structure Calculations ◽  
Good Agreement

The microwave spectra of CD3CH2CN, 13CH3CH2CN, CH313CH2CN and CH3CH2C15N have been measured. In addition the spectrum of CH3CH213CN has been remeasured with greater accuracy. From these spectra and those previously reported - CH3CH2CN, CH3CD2CN, CH2DCH2CN (sym) and CH2DCH2CN (asym) - a complete rs-structure has been calculated by the equations of Kraitchman and Chutjian. r0-structure calculations were performed with different assumptions due to the symmetry of the molecule. A comparison between r0- and rs-structure was made and showed good agreement especially for the atoms of the frame.The quadrupole coupling constants of the above mentioned isotopes of ethyl cyanide were obtained from the hyperfine structure of the spectra with the exception of CH3CH2C15N, which has no nucleus with quadrupole moment. The quadrupole coupling tensor in its principal axis system was determined from the constants of CD3CH2CN and CH3CD2CN using the angle e between their principal axes of inertia in the a-b-plane.From Stark effect measurements the dipole moment of CH3CH2CN was reevaluated. To determine the direction of the dipole moment Stark effect measurements for CD3CH2CN and CH3CD2CN were carried out.

scholarly journals The Microwave Spectrum of 3,4-Dihydro-1,2-Pyran

1985 ◽  
Vol 40 (9) ◽  
pp. 913-919
Author(s):  
Juan Carlos López ◽  
José L. Alonso
Keyword(s):  
Dipole Moment ◽  
Excited States ◽  
Ground State ◽  
Principal Axis ◽  
Microwave Spectrum ◽  
Average Intensity ◽  
Ring Conformation ◽  
Vibrationally Excited ◽  
Rotational Constants ◽  
Displacement Measurements

Abstract The rotational transitions of 3,4-dihydro-1,2-pyran in the ground state and six vibrationally excited states have been assigned. The rotational constants for the ground state (A = 5198.1847(24), B = 4747.8716(24) and C = 2710.9161(24) have been derived by fitting μa, μb and μc-type transitions. The dipole moment was determined from Stark displacement measurements to be 1.400(8) D with its principal axis components |μa| =1.240(2), |μb| = 0.588(10) and |μc| = 0.278(8) D. A model calculation to reproduce the ground state rotational constants indicates that the data are consistent with a twisted ring conformation. The average intensity ratio gives vibrational separations between the ground and excited states of the ring-bending and ring-twisting modes of ~ 178 and ~ 277 cm-1 respectively.

External-field-induced electric dipole moment of biexcitons in a semiconductor

1995 ◽  
Vol 52 (24) ◽  
pp. R16993-R16996 ◽  
Author(s):  
P. Leisching ◽  
R. Ott ◽  
P. Haring Bolivar ◽  
T. Dekorsy ◽  
H. J. Bakker ◽  
...  
Keyword(s):  
Dipole Moment ◽  
External Field ◽  
Electric Dipole Moment ◽  
Electric Dipole

Untersuchung einer Resonanz des karzinogenen Benzpyren. Studies on a Resonance of Carcinogenic Benzpyrene

1975 ◽  
Vol 30 (3-4) ◽  
pp. 152-156
Author(s):  
P Böhm ◽  
F Popp
Keyword(s):  
Dipole Moment ◽  
External Field ◽  
External Perturbation ◽  
Correlation Effect ◽  
Resonance Phenomenon ◽  
Carcinogenic Effect ◽  
Resonance States ◽  
Sensitive Dependence ◽  
Param Eters

Abstract The a- and p-states of 3.4-benzpyrene are calculated by use of common param eters and of a param eter set which predicts the quasi-degeneracy of these states. The quasi-degeneracy will be represented by the breakage of pairing theorem and is to be described as a correlation effect, caused by an asymmetric potential. An external field represents an external perturbation, introduced by interaction with the bioreceptor. The calculation shows a sensitive dependence of probability amplitudes for different configurations which participate in the quasi-degenerated resonance states. Thereby the dipole moment may quickly be changed so that excitons are produced. The resonance phenomenon may lead to the carcinogenic effect

Electronic structure of POPC phospholipids under constant electric field

2017 ◽  
Vol 31 (22) ◽  
pp. 1750157
Author(s):  
Jaciéli Evangelho de Figueiredo ◽  
Leandro Barros da Silva
Keyword(s):  
Electronic Structure ◽  
Dipole Moment ◽  
External Field ◽  
Electric Field ◽  
Electric Fields ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Constant Electric Field ◽  
Ab Initio Study ◽  
Electronic And Structural Properties

We report in the present paper an ab initio study on the electronic and structural properties of phospholipidic membranes under the influence of electric fields. We show that the external field alters the charge distribution of the molecule leading to a modification in the electric dipole moment. The torque on the phospholipid may then cause a transmembranar stress, which by its turn, weakens the membrane allowing to the formation of a pore.

[001] Surface Structure in SrTiO3 — Atomistic Study

1998 ◽  
Vol 05 (01) ◽  
pp. 341-345 ◽  
Author(s):  
Eugene Heifets ◽  
Simon Dorfman ◽  
David Fuks ◽  
Eugene Kotomin ◽  
Alex Gordon
Keyword(s):  
Dipole Moment ◽  
External Field ◽  
Polarization Effect ◽  
Surface Region ◽  
Superconducting Films ◽  
Surface Layers ◽  
Near Surface ◽  
Atomistic Study ◽  
Model Technique ◽  
Thin Superconducting Films

Thin superconducting films attract great attention as a promising material for plenty of applications. The surface determines most of the physical properties of these films. We studied the polarization effect for the [001] surface of perovskite ABO 3 superconducting crystals on the example of SrTiO 3. Optimization of the ion positions in several surface layers is provided. These ions are placed in the external field of the rest crystal. The interaction between ions is described by means of the shell model technique. We show that Ti +4, Sr 2+ and O -2 ions displace differently from their crystalline sites, which leads to the creation of a dipole moment in the near-surface region.

scholarly journals NQR and Zeeman Split NQR Investigations on Oriented YBa2Cu3O7-δ and Non-Oriented Bi-Ca-Sr-Cu-O Powder

1990 ◽  
Vol 45 (3-4) ◽  
pp. 415-418
Author(s):  
H. Riesemeier ◽  
H. Kamphausen ◽  
J. Pattloch ◽  
G. Stadermann ◽  
K. Lüders
Keyword(s):  
Magnetic Field ◽  
Principal Axis ◽  
Axially Symmetric ◽  
Powder Samples ◽  
Principal Axis System ◽  
Asymmetry Parameters

Abstract Powder samples of YBa2Cu3O7-δ a were oriented by mechanically vibrating the powder at 2.4 K in a magnetic field of 1.2 T. Zeeman split NQR spectra of 63,65 Cu were obtained for the two different Cu sites. The data confirm the orientations of the principal axis system: x ∥ c for the Cu (1) site and z ∥ c for the Cu (2) site. Asymmetry parameters were determined for the two Cu sites yielding η̄1 = 0.95 ±0.2 and η̄2 = 0.008 ± 0.002. At the Cu(l) site local variations of the symmetry of the EFG tensor were observed. For the Cu sites (CuO2 -layers) in the Bi2Ca2Sr2Cu3Oy phase a nearly axially symmetric EFG tensor was found.

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