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The formation and collapse of a protostar involves the simultaneous infall and outflow of material in the presence of magnetic fields, self-gravity, and rotation. We use self-similar techniques to self-consistently model the anisotropic…

天体物理学 · 物理学 2016-01-13 Mahmoud Aburihan , Jason D. Fiege , Richard N. Henriksen , Thibaut Lery

Conformational phases of a semiflexible off-lattice homopolymer model near an attractive substrate are investigated by means of multicanonical computer simulations. In our polymer-substrate model, nonbonded pairs of monomers as well as…

计算物理 · 物理学 2009-07-20 Monika Möddel , Michael Bachmann , Wolfhard Janke

We study the self-assembly on a spherical surface of a model for a binary mixture of amphiphilic dimers in the presence of guest particles via Monte Carlo (MC) computer simulation. All particles have a hard core, but one monomer of the…

软凝聚态物质 · 物理学 2021-06-11 Nkosinathi Dlamini , Santi Prestipino , Giuseppe Pellicane

We show results of Monte Carlo simulations of an array of monodispersed magnetic monodomain particles, in a square lattice with dipolar interactions and perpendicular uniaxial anisotropy. We first show the equilibrium phase diagram of the…

材料科学 · 物理学 2008-10-17 Daniel A Stariolo , Orlando V. Billoni

The formation of various bicontinuous phases from binary blends of linear AB diblock copolymers (DBCPs) is studied using the polymeric self-consistent field theory. The theoretical study predicts that the double-diamond and the "plumber's…

软凝聚态物质 · 物理学 2021-09-01 Chi To Lai , An-Chang Shi

We study the behavior of negatively charged colloids with two positively charged polar caps close to a planar patterned surface. The competition between the different anisotropic components of the particle-particle interaction patterns is…

软凝聚态物质 · 物理学 2018-09-25 Emanuele Locatelli , Emanuela Bianchi

We examine sedimentation density profiles of star polymer solutions as an example of colloidal systems in sedimentation equilibrium which exhibit reentrant melting in their bulk phase diagram. Phase transitions between a fluid and a fluid…

软凝聚态物质 · 物理学 2009-11-07 J. Dzubiella , H. M. Harreis , C. N. Likos , H. Lowen

We present results of Monte-Carlo simulations for finite 2D single and bilayer systems. Strong Coulomb correlations lead to arrangement of particles in configurations resembling a crystal lattice. For binary layers, there exists a…

介观与纳米尺度物理 · 物理学 2015-06-24 A. V. Filinov , M. Bonitz , Yu. E. Lozovik

We report on the structural properties of mixed aggregates made from rare-earth inorganic nanoparticles (radius 20 Angstroms) and polyelectrolyte-neutral block copolymers in aqueous solutions. Using scattering experiments and Monte Carlo…

软凝聚态物质 · 物理学 2021-09-27 K. Yokota , M. Morvan , J. -F. Berret , J. Oberdisse

The phase separation of a simple binary mixture of incompatible linear polymers in solution is investigated using an extension of the sedimentation equilibrium method, whereby the osmotic pressure of the mixture is extracted from the…

软凝聚态物质 · 物理学 2009-09-29 Chris I. Addison , Pierre-Arnaud Artola , Jean-Pierre Hansen , Ard A. Louis

We develop a new quantitative molecular theory of liquid-phase dipolar polymer gels. We model monomer units of the polymer network as a couple of charged sites separated by a fluctuating distance. For the first time, within the random phase…

软凝聚态物质 · 物理学 2021-03-09 Yury A. Budkov , Nikolai N. Kalikin , Andrei L. Kolesnikov

The present paper is a continuation of \cite{dHP07b}. The object of interest is a two-dimensional model of a directed copolymer, consisting of a random concatenation of hydrophobic and hydrophilic monomers, immersed in an emulsion,…

概率论 · 数学 2009-11-13 Frank den Hollander , Nicolas Petrelis

The stability of micelles self-assembled from block copolymers can be altered by the degradation of the blocks. Slow degradation shifts the equilibrium size distribution of block copolymer micelles and change their properties.…

软凝聚态物质 · 物理学 2012-06-27 Alexander Muratov , Vladimir A. Baulin

As shown by Marunovic and Murkovic, non-minimal d-stars, composite structures consisting of a boson star and a global monopole non-minimally coupled to the general relativistic field, can have extremely high gravitational compactness. In a…

广义相对论与量子宇宙学 · 物理学 2024-01-02 Gray D. Reid , Matthew W. Choptuik

We investigate a lattice model of polymers where the nearest-neighbour monomer-monomer interaction strengths differ according to whether the local configurations have so-called ``hydrogen-like'' formations or not. If the interaction…

软凝聚态物质 · 物理学 2009-11-13 J Krawczyk , A L Owczarek , T Prellberg

We simulate a molecular Bose-Einstein condensate in the strongly dipolar regime, observing the existence of self-bound droplets, as well as their splitting into multiple droplets by confinement-induced frustration. Our quantum Monte Carlo…

量子气体 · 物理学 2024-07-16 Tim Langen , Jordi Boronat , Juan Sánchez-Baena , Raúl Bombín , Tijs Karman , Ferran Mazzanti

Block copolymer melts self-assemble in the bulk into a variety of nanostructures, making them perfect candidates to template the position of nanoparticles. The morphological changes of block copolymers are studied in the presence of a…

软凝聚态物质 · 物理学 2019-10-31 Javier Diaz , Marco Pinna , Andrei V. Zvelindovsky , Ignacio Pagonabarraga

On a basis of a two-length scale description of hydrophobic interactions we develop a continuous self-consistent theory of solute-water interactions which allows to determine a hydrophobic layer of a solute molecules of any geometry with…

软凝聚态物质 · 物理学 2007-05-23 G. Sitnikov , S. Nechaev , M. Taran , A. Muryshev

We study the phase behaviour of a binary mixture of colloidal hard spheres and freely-jointed chains of beads using Monte Carlo simulations. Recently Panagiotopoulos and coworkers predicted [Nat. Commun. 5, 4472 (2014)] that the hexagonal…

软凝聚态物质 · 物理学 2016-08-24 John R Edison , Tonnishtha Dasgupta , Marjolein Dijkstra

We investigate the role played by density inhomogeneities and dissipation on the final outcome of collapse of a self-gravitating sphere. By imposing a perturbative scheme on the thermodynamical variables and gravitational potentials we…

广义相对论与量子宇宙学 · 物理学 2021-02-12 Nolene F. Naidu , Robert S. Bogadi , Anand Kaisavelu , Megan Govender