scholarly journals Hybrid modes in a single thermally excited asymmetric dimer antenna

2021 ◽  
Vol 46 (5) ◽  
pp. 981
Author(s):  
Loubnan Abou-Hamdan ◽  
Claire Li ◽  
Riad Haidar ◽  
Valentina Krachmalnicoff ◽  
Patrick Bouchon ◽  
...  
Keyword(s):  
Asymmetric Dimer

Discovery of a New Asymmetric Dimer Nenestatin B and Implications of Dimerizing Enzyme in a Deep Sea Actinomycete

2021 ◽  
Author(s):  
Xiaodong Jiang ◽  
Zhuangjie Fang ◽  
Qingbo Zhang ◽  
Wei Liu ◽  
Liping Zhang ◽  
...  
Keyword(s):  
Natural Products ◽  
Broad Spectrum ◽  
Deep Sea ◽  
Important Family ◽  
Asymmetric Dimer

Benzofluorene-containing atypical angucyclines are an important family of natural products with a broad spectrum of antibacterial and cytotoxic properties. Interestingly, symmetric and asymmetric dimer showed better activity than the monomer...

Influence of a size asymmetric dimer on the structure and differential capacitance of an electric double layer. A Monte Carlo study

2017 ◽  
Vol 226 ◽  
pp. 98-103 ◽  
Author(s):  
Stanisław Lamperski ◽  
Lutful Bari Bhuiyan ◽  
Douglas Henderson ◽  
Monika Kaja ◽  
Whasington Silvestre-Alcantara
Keyword(s):  
Monte Carlo ◽  
Double Layer ◽  
Electric Double Layer ◽  
Monte Carlo Study ◽  
Differential Capacitance ◽  
Asymmetric Dimer

scholarly journals Plasmons Coupling and Anti-Crossing of Nanometal Asymmetric Dimer

2021 ◽  
Author(s):  
Jianxin Zhang ◽  
Jian Zhang ◽  
Yongfang Li
Keyword(s):  
Harmonic Oscillator ◽  
Electrostatic Potential ◽  
Physical Mechanism ◽  
Coupling Model ◽  
Frequency Offset ◽  
Plasmon Coupling ◽  
Dark Mode ◽  
Harmonic Oscillator Model ◽  
Asymmetric Dimer ◽  
Bright Mode

Abstract In this paper, by defining a new physical quantity called as the frequency offset in the harmonic oscillator model and combining with the established plasmon coupling model, we successfully explain the anti-crossing property caused by plasmon coupling of dimer composed of a silver nanoring and a silver nanorod. In the plasmons coupling model, we reasonably reveal that the physical mechanism of the coupling between bright mode and dark mode of the plasmons is mainly represented by the coulomb potential and the electrostatic potential. With this model, we explain also the asymmetric feature the variation of frequency offset and coupling coefficient with coupling distance.

ADSORPTION SITES OF THE PRODUCTS OF GeH4 ON ASYMMETRIC Si(100)(2×1) SURFACE

2004 ◽  
Vol 18 (08) ◽  
pp. 1191-1202
Author(s):  
ŞENAY KATıRCıOĞLU
Keyword(s):  
Density Functional ◽  
Geometry Optimization ◽  
Density Functional Theory Method ◽  
Adsorption Model ◽  
Functional Theory ◽  
Adsorption Models ◽  
Adsorption Sites ◽  
Asymmetric Dimer ◽  
Adsorption Energies ◽  
Relative Adsorption

The decomposition of GeH 4 on Si (100)(2×1) was investigated on different adsorption models of fragments using density functional theory method. The most probable adsorption model of fragments corresponding to the growth steps of SiGe film has been obtained by geometry optimization and single value total energy calculations. The relative adsorption energies of GeH 3, GeH 2 and GeH have been found to be -5.6, -5.1, and -4.5 eV for their most probable adsorption models respectively. It has been found that, the asymmetric dimer bond rows of Ge on Si (100) surface can be constructed by following the adsorption models corresponding to the relative adsorption energies of GeH 3, GeH 2 and GeH .

Structure and aggregation properties of a Schiff-base zinc(ii) complex derived from cis-1,2-diaminocyclohexane

2015 ◽  
Vol 44 (29) ◽  
pp. 13040-13048 ◽  
Author(s):  
Giuseppe Consiglio ◽  
Ivan Pietro Oliveri ◽  
Francesco Punzo ◽  
Amber L. Thompson ◽  
Santo Di Bella ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Complex ◽  
Base Complex ◽  
X Ray ◽  
Asymmetric Dimer

The effect of the bridging diamine upon the aggregation properties of a ZnII Schiff-base complex is reported. The X-ray crystal structure indicates the presence of an asymmetric dimer which is preserved even in solution.

Structure of the N-terminal domain of Euprosthenops australis dragline silk suggests that conversion of spidroin dope to spider silk involves a conserved asymmetric dimer intermediate

2019 ◽  
Vol 75 (7) ◽  
pp. 618-627 ◽  
Author(s):  
Wangshu Jiang ◽  
Glareh Askarieh ◽  
Alexander Shkumatov ◽  
My Hedhammar ◽  
Stefan D. Knight
Keyword(s):  
Electrostatic Interactions ◽  
Spider Silk ◽  
Quaternary Structure ◽  
Nephila Clavipes ◽  
Trigger Mechanism ◽  
Dragline Silk ◽  
Terminal Domain ◽  
Structure Changes ◽  
Molecular Events ◽  
Asymmetric Dimer

Spider silk is a biomaterial with exceptional mechanical toughness, and there is great interest in developing biomimetic methods to produce engineered spider silk-based materials. However, the mechanisms that regulate the conversion of spider silk proteins (spidroins) from highly soluble dope into silk are not completely understood. The N-terminal domain (NT) of Euprosthenops australis dragline silk protein undergoes conformational and quaternary-structure changes from a monomer at a pH above 7 to a homodimer at lower pH values. Conversion from the monomer to the dimer requires the protonation of three conserved glutamic acid residues, resulting in a low-pH `locked' dimer stabilized by symmetric electrostatic interactions at the poles of the dimer. The detailed molecular events during this transition are still unresolved. Here, a 2.1 Å resolution crystal structure of an NT T61A mutant in an alternative, asymmetric, dimer form in which the electrostatic interactions at one of the poles are dramatically different from those in symmetrical dimers is presented. A similar asymmetric dimer structure from dragline silk of Nephila clavipes has previously been described. It is suggested that asymmetric dimers represent a conserved intermediate state in spider silk formation, and a revised `lock-and-trigger' mechanism for spider silk formation is presented.

An Asymmetric Dimer as the Basic Subunit in Alzheimer’s Disease Amyloid β Fibrils

2012 ◽  
Vol 124 (25) ◽  
pp. 6240-6243 ◽  
Author(s):  
Juan Miguel Lopez del Amo ◽  
Matthias Schmidt ◽  
Uwe Fink ◽  
Muralidar Dasari ◽  
Marcus Fändrich ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Amyloid Β ◽  
Basic Subunit ◽  
Asymmetric Dimer
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