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Structural changes induced by chemical reactions critically determine the catalytic performance and mechanism. However, precise tracking of the three-dimensional (3D) atomic structural evolution of individual bimetallic nanocatalysts…

材料科学 · 物理学 2025-09-23 Jisheng Xie , Zhiheng Xie , Dijin Jiang , Shiyun Li , Yiheng Dai , Yao Zhang , Mufan Li , Jihan Zhou

In this paper, we study the linear stability of Couette flow for 2D compressible Navier-Stokes-Poisson system at high Reynolds number in the domain $\mathbb{T}\times\mathbb{R}$ with initial perturbation in Sobolev spaces. We establish the…

偏微分方程分析 · 数学 2025-03-19 Yurui Lu , Xueke Pu

Au nanoclusters grown on SiO$_2$ by physical vapor deposition are exposed to Br$_2$ and then measured with 1.5 keV Na$^+$ low energy ion scattering. It is found that the clusters are able to dissociate the molecules which then adsorb as…

介观与纳米尺度物理 · 物理学 2018-10-08 Christopher R. Salvo , Josiah Keagy , Jory A. Yarmoff

Two-component (normal and degenerate stars) models are the simplest realization of clusters with a mass spectrum because high mass stars evolve quickly into degenerates, while low mass stars remain on the main-sequence for the age of the…

天体物理学 · 物理学 2015-06-24 Sungsoo S. Kim , Hyung Mok Lee , Jeremy Goodman

Moir\'e excitons are emergent optical excitations in 2D semiconductors with deep moir\'e superlattice potentials. While these excitations have been realized in several platforms, a system with dynamically tunable moir\'e potential to tailor…

I present a simplified analytical model that simulates the evolution of the binary population in a dynamically evolving globular cluster. A number of simulations have been run spanning a wide range in initial cluster and environmental…

天体物理学 · 物理学 2009-11-13 A. Sollima

Fragmentation and binary formation processes are studied using three-dimensional resistive MHD nested grid simulations. Starting with a Bonnor-Ebert isothermal cloud rotating in a uniform magnetic field, we calculate the cloud evolution…

天体物理学 · 物理学 2009-11-13 Masahiro N. Machida , Kohji Tomisaka , Tomoaki Matsumoto , Shu-ichiro Inutsuka

Different compaction processes of the nanosized granular system, which is a prototype of an alumina nanopowder, are studied by the granular dynamics method. For all processes: compaction curves ''density vs. pressure'' of the powder compact…

软凝聚态物质 · 物理学 2020-04-15 G. Sh. Boltachev , E. A. Chingina , N. B. Volkov , K. E. Lukyashin

Asphaltene and smaller aromatic molecules tend to form linear nanoaggregates in bitumen.Over the years bitumen undergoes chemical aging and during this process, the size of the nanoaggregate increases. This increase is associated with an…

化学物理 · 物理学 2017-01-04 Claire A. Lemarchand , Thomas B. Schrøder , Jeppe C. Dyre , Jesper S. Hansen

The properties of Mg II absorption-selected systems show a large variety of kinematics and higher ionization conditions. A multivariate taxonomic study of Mg II absorbers has yielded an "extreme" class of "Double" systems. These Double…

天体物理学 · 物理学 2007-05-23 Chris Churchill

The recently developed two-stage growth model of synthesis of monodispersed polycrystalline colloidal particles is utilized and improved to explain growth of uniform cadmium sulfide spheres. The model accounts for the coupled processes of…

软凝聚态物质 · 物理学 2010-09-22 Sergiy Libert , Vyacheslav Gorshkov , Dan Goia , Egon Matijevic , Vladimir Privman

We use line-of-sight quadrupole mass spectrometry to monitor the spontaneous formation of GaN nanowires on Si during molecular beam epitaxy. We find that the temporal evolution of nanowire ensembles is well described by a double logistic…

材料科学 · 物理学 2024-02-06 Sergio Fernández-Garrido , Johannes K. Zettler , Lutz Geelhaar , Oliver Brandt

Two-dimensional multi-layer materials with an induced moir\'e pattern, either due to strain or relative twist between layers, provide a versatile platform for exploring strongly correlated and topological electronic phenomena. While these…

强关联电子 · 物理学 2025-05-27 Mohammed M. Al Ezzi , Albert Zhu , Daniel Bennett , Daniel T. Larson , Efthimios Kaxiras

Low-energy structures of a hybrid system consisting of a polymer and an attractive nanowire substrate as well as the thermodynamics of the adsorption transition are studied by means of Monte Carlo computer simulations. Depending on…

软凝聚态物质 · 物理学 2011-07-05 Thomas Vogel , Michael Bachmann

We present a unified model of compound semiconductor growth based on kinetic Monte Carlo simulations in tandem with new experimental results that can describe and predict the mechanisms for the formation of various types of nanostructures…

We study the motion of dispersed nanoprobes in entangled active-passive polymer mixtures. By comparing the two architectures of linear vs. unconcatenated and unknotted circular polymers, we demonstrate that novel, rich physics emerge. For…

软凝聚态物质 · 物理学 2021-08-27 Andrea Papale , Jan Smrek , Angelo Rosa

Molecular Cloud Complexes (MCCs) are highly structured and ``turbulent''. Observational evidence suggests that MCCs are dynamically dominated systems, rather than quasi-equilibrium entities. The observed structure is more likely a…

天体物理学 · 物理学 2008-11-26 F. Heitsch , A. D. Slyz , J. E. G. Devriendt , L. W. Hartmann , A. Burkert

Polymer fibers are currently exploited in tremendously important technologies. Their innovative properties are mainly determined by the behavior of the polymer macromolecules under the elongation induced by external mechanical or…

The diffusive motion of metal nanoparticles Au and Ag on monolayer and between bilayer heterostructures of transition metal dichalcogenides and graphene are investigated in the framework of density functional theory. We found that the…

介观与纳米尺度物理 · 物理学 2015-06-01 F. Iyikanat , H. Sahin , R. T. Senger , F. M. Peeters

Inspired by the rich physics of twisted 2D bilayer moir\'{e} systems, we study Coulomb interacting systems subjected to two overlapping finite 1D lattice potentials of unequal periods through exact numerical diagonalization. Unmatching…

介观与纳米尺度物理 · 物理学 2021-01-27 DinhDuy Vu , S. Das Sarma
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