نتایج جستجو برای: molecular dipole

تعداد نتایج: 656161  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Qing Hu Dafei Jin Jun Xiao Sang Hoon Nam Xiaoze Liu Yongmin Liu Xiang Zhang Nicholas X Fang

Two-dimensional molecular aggregate (2DMA), a thin sheet of strongly interacting dipole molecules self-assembled at close distance on an ordered lattice, is a fascinating fluorescent material. It is distinctively different from the conventional (single or colloidal) dye molecules and quantum dots. In this paper, we verify that when a 2DMA is placed at a nanometric distance from a metallic subst...

Journal: :Angewandte Chemie 2014
Hong-Tao Liu Chuan-Gang Ning Dao-Ling Huang Lai-Sheng Wang

Molecules with large enough dipole moments can bind an electron by the dipole field, which has little effect on the molecular core. A molecular anion can be excited to a dipole-bound state, which can autodetach by vibronic coupling. Autodetachment spectroscopy of a complex anion cooled in a cryogenic ion trap is reported. Vibrational spectroscopy of the dehydrogenated uracil radical is obtained...

2005
V. I. Yukalov

A spin system is considered with a Hamiltonian typical of molecular magnets, having dipole-dipole interactions and a single-site magnetic anisotropy. In addition, spin interactions through the common radiation field are included. A fully quantummechanical derivation of the collective radiation rate is presented. An effective narrowing of the dipole-dipole attenuation, due to high spin polarizat...

2001
Roberto Berardi Silvia Orlandi Demetri J. Photinos Alexandros G. Vanakaras Claudio Zannoni

We study the effect of molecular dipole strength on the polymorphism of smectic A liquid crystals using computer simulations and density functional theory. We find, for a system of polar Gay–Berne particles with an off-centre axial dipole, a change in molecular organisation from non interdigitated to interdigitated (SAd) structure.

Journal: :Anticancer research 2006
Kazuto Ohkura Hitoshi Hori Hideaki Nagamune

BACKGROUND Intermedilysin (ILY) is a human-specific cytolysin secreted from Streptococcus intermedius. In this study, the dynamic structure of ILY, StreptolysinO (SLO) and their 12mer substituted mutants for 500 ps was analyzed. Several parameters, such as dipole moment and electrostatic potential, were determined to elucidate the molecular mechanism of membrane binding. MATERIALS AND METHODS...

2006
Ch. Lee E. A. Ostrovskaya

Recently, several quantum computation schemes utilizing ultracold dipolar molecules trapped in optical lattices were suggested [1]. The coupling due to dipole-dipole interactions between molecular bits is strong enough to induce entanglement and hence to realize a set of universal quantum logic gates. However, the electric dipole-dipole interaction between molecules can not be controllably swit...

2004
W. Hong Z. Suo

A molecule adsorbed on a metal surface carries an electric dipole moment, and diffuses on the surface. When a collection of identical molecules partially covers the surface, the dipole–dipole interactions, along with other thermodynamic forces, drive the molecules to aggregate into monolayer islands, in the shape of dots or stripes. The dipole– dipole interactions mediate through the electrosta...

Journal: :The Journal of chemical physics 2011
Yiyang Zhang Shuiqing Li Wen Yan Qiang Yao Stephen D Tse

In contrast to van der Waals (vdW) forces, Coulombic dipolar forces may play a significant role in the coagulation of nanoparticles (NPs) but has received little or no attention. In this work, the effect of dipole-dipole interaction on the enhancement of the coagulation of two spherically shaped charge-neutral TiO(2) NPs, in the free molecular regime, is studied using classical molecular dynami...

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