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The question of if silica nanoparticles can enhance the ionic conductivity of a polymer electrolyte above its crystallization temperature has remained unclear for the two decades following the first experiments on these systems. We use…

软凝聚态物质 · 物理学 2024-02-29 Joel Martin Dalmas , Ambroise van Roekeghem , Natalio Mingo , Stefano Mossa

Nanoparticles are often covered in ligand monolayers, which can undergo a temperature-dependent order-disorder transition that switches the particle-particle interaction from repulsive to attractive in solution. In this work, we examine how…

软凝聚态物质 · 物理学 2018-07-05 Asaph Widmer-Cooper , Phillip L. Geissler

This study utilizes molecular dynamics simulations to scrutinize the influence of type and volume fraction of nanoparticle on the density of nanofluids, i.e. silver (as a hydrophilic case) and titanium dioxide (as a hydrophobic case)…

应用物理 · 物理学 2021-05-20 M. M. Heyhat , M. Abbasi , A. Rajabpour

The rate of water flow through hydrophobic nanocapillaries is greatly enhanced as compared to that expected from macroscopic hydrodynamics. This phenomenon is usually described in terms of a relatively large slip length, which is in turn…

介观与纳米尺度物理 · 物理学 2016-03-22 Mehdi Neek-Amal , F. M. Peeters , I. V. Grigorieva , A. K. Geim

Large-scale molecular dynamics simulations are used to simulate a layer of nanoparticles diffusing on the surface of a liquid. Both a low viscosity liquid, represented by Lennard-Jones monomers, and a high viscosity liquid, represented by…

软凝聚态物质 · 物理学 2013-01-10 Shengfeng Cheng , Gary S. Grest

Magnetic properties with 3 different sizes of Ni nanochains, synthesized by a technique of wet chemical solution, have been investigated experimentally. The sample sizes are 50 nm, 75 nm, and 150 nm with a typical length of a few microns.…

介观与纳米尺度物理 · 物理学 2007-05-23 Wangzhi Zheng , Lin He , Chinping Chen , Lin He , Wei Zhou , Chenmin Liu , Lin Guo , Huibin Xu

By means of contact dynamics simulations, we investigate a dense packing composed of polyhedral particles under quasistatic shearing. The effect of particle shape is analyzed by comparing the polyhedra packing with a packing of similar…

经典物理 · 物理学 2011-07-12 Émilien Azema , F. RadjaÏ , G. Saussine

Nanoparticles with different surface morphologies that straddle the interface between two immiscible liquids are studied via molecular dynamics simulations. The methodology employed allows us to compute the interfacial free energy at…

软凝聚态物质 · 物理学 2016-04-27 Sepideh Razavi , Ilona Kretzschmar , Joel Koplik , Carlos E. Colosqui

We present a study on the magnetic properties of naked and silica-coated Fe3O4 nanoparticles with sizes between 5 and 110 nm. Their efficiency as heating agents was assessed through specific power absorption (SPA) measurements as a function…

The surface impact and collisions of particle-laden nanodrops are studied using molecular dynamics computer simulations. The drops are composed of Lennard- Jones dimers and the particles are rigid spherical sections of a cubic lattice, with…

软凝聚态物质 · 物理学 2015-09-02 Joel Koplik

Experiments of water wicking in 1D silicon-dioxide nanochannels of heights 59 nm, 87 nm, 124 nm and 1015 nm are used to estimate the disjoining pressure of water which was found to be as high as ~1.5 MPa while exponentially decreasing with…

流体动力学 · 物理学 2021-09-16 An Zou , Sajag Poudel , Manish Gupta , Shalabh C. Maroo

Dense packings composed of irregular polyhedral particles are investigated by numerical simulations under quasistatic triaxial compression. The Contact Dynamics method is used for this investigation with 40 000 particles. The effect of…

经典物理 · 物理学 2015-05-13 Émilien Azema , Farhang Radjaï , Gilles Saussine

We analyze the contact and force networks in a dense confined packing of pentagonal particles simulated by means of the contact dynamics method. The particle shape effect is evidenced by comparing the data from pentagon packing and from a…

经典物理 · 物理学 2007-09-17 émilien Azema , Farhang Radjaï , Robert Peyroux , Gilles Saussine

The impact of nanomaterials on lung fluids or on the plasma membrane of living cells has prompted researchers to examine the interactions between nanoparticles and lipid vesicles. Recent studies have shown that nanoparticle-lipid…

软凝聚态物质 · 物理学 2021-09-21 F. Mousseau , E. K. Oikonomou , V. Baldim , S. Mornet , J. -F. Berret

Lipid membranes, the barrier defining living cells and many of their sub-compartments, bind to a wide variety of nano- and micro-meter sized objects. In the presence of strong adhesive forces, membranes can strongly deform and wrap the…

The surface aggregates structure of dimethyldodecylamine-N-oxide (C12DAO) in three silica dispersions of different particle sizes (16 - 42 nm) was studied by small-angle neutron scattering (SANS) in a H2O/D2O solvent mixture matching the…

软凝聚态物质 · 物理学 2010-08-31 Dersy Lugo , Julian Oberdisse , Alain Lapp , Gerhard Findenegg

A convenient method has been developed to thin electron beam fabricated Silicon nanopillars under controlled surface manipulation by transforming the surface of the pillars to an oxide shell layer followed by the growth of sacrificial…

介观与纳米尺度物理 · 物理学 2015-12-29 S Kalem , P Werner , B Nilsson , V G Talalaev , M Hagberg , O Arthursson , U Sodervall

Ordering nanoparticles into a desired super-structure is often crucial for their technological applications. We use molecular dynamics simulations to study the assembly of nanoparticles in a polymer brush randomly grafted to a planar…

软凝聚态物质 · 物理学 2017-12-11 Shengfeng Cheng , Mark J. Stevens , Gary S. Grest

In the present work, the effect of different nanofiller (BaTiO3, CeO2, Er2O3 or TiO2) on blend solid polymer electrolyte comprising of PEO and PVC complexed with bulky LiPF6 have been explored. The XRD analysis confirms the polymer…

应用物理 · 物理学 2018-07-11 Anil Arya , Mohd Sadiq , A. L. Sharma

Silica (SiO$_2$) nanotubes (NTs) are used in a wide range of applications that go from sensors to nanofluidics. Currently, these NTs can be grown with diameters as small as 3 nm, with walls 1.5 nm thick. Recent experimental advances…

介观与纳米尺度物理 · 物理学 2023-07-20 Henrique Musseli Cezar , Caetano Rodrigues Miranda