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The molecular structure of a multilayer of 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) adsorbed on the surface of the hydrosol of silica nanoparticles has been studied by the synchrotron radiation scattering method. According to the…

Soft Condensed Matter · Physics 2015-05-20 Aleksey M. Tikhonov

The spatial structure of the transition region between an insulator and an electrolyte solution was studied with x-ray scattering.The electron density profile across the n-hexane/silica sol interface (solutions with 5-nm, 7-nm, and 12-nm…

Soft Condensed Matter · Physics 2009-11-11 Aleksey M. Tikhonov

The dependence of the structure of a phospholipid layer (DSPC and SOPC) adsorbed on a hydrosol substrate on the concentration of NaOH in a solution of 5-nm silica particles has been studied by X-ray reflectrometry with the use of…

Soft Condensed Matter · Physics 2015-12-07 Aleksey M. Tikhonov , Viktor E. Asadchikov , Yuri O. Volkov

The ordering of a multilayer consisting of DSPC bilayers on a silica sol substrate is studied within the model-independent approach to the reconstruction of profiles of the electron density from X-ray reflectometry data. It is found that…

We are presenting a new method of processing polystyrene-silica nanocomposites, which results in a very well-defined dispersion of small primary aggregates (assembly of 15 nanoparticles of 10 nm diameter) in the matrix. The process is based…

Materials Science · Physics 2009-04-02 Nicolas Jouault , Perrine Vallat , Florent Dalmas , Sylvère Said , Jacques Jestin , François Boué

The behavior of colloidal particles with a hard core and a soft shell has attracted the attention for researchers in the physical-chemistry interface not only due the large number of applications, but due the unique properties of these…

Soft Condensed Matter · Physics 2021-02-23 Murilo S. Marques , José Rafael Bordin

We investigate by scattering techniques the structure of water-based soft composite materials comprising a crystal made of Pluronic block-copolymer micelles arranged in a face-centered cubic lattice and a small amount (at most 2% by volume)…

Soft Condensed Matter · Physics 2012-06-07 Elisa Tamborini , Neda Ghofraniha , Julian Oberdisse , Luca Cipelletti , Laurence Ramos

The structure of the adsorbed layer of alkali ions on the surface of colloidal silica solutions with a particle size of ~27 nm has been studied by reflectometry and diffuse scattering of synchrotron radiation with a photon energy of about…

The forces of electrical imaging strongly polarize the surface of colloidal silica. I used X-ray scattering to study the adsorbed 2-nm-thick compact layer of alkali ions at the surface of concentrated solutions of 5-nm, 7-nm, and 22-nm…

Soft Condensed Matter · Physics 2007-05-23 Aleksey M. Tikhonov

The effect of silica nanoparticles on transient microemulsion networks made of microemulsion droplets and telechelic copolymer molecules in water is studied, as a function of droplet size and concentration, amount of copolymer, and…

Soft Condensed Matter · Physics 2010-12-07 Nicolas Puech , Serge Mora , Ty Phou , Gregoire Porte , Jacques Jestin , Julian Oberdisse

The authors present a review of the systematic studies of the structure of macroscopically planar thin films at the air-liquid interface (water, alkali solution and silica hydrosol). A common feature of the considered works is the…

Reinforcement of elastomers by colloidal nanoparticles is an important application where microstructure needs to be understood - and if possible controlled - if one wishes to tune macroscopic mechanical properties. Here the…

Soft Condensed Matter · Physics 2007-05-23 Julian Oberdisse , Peter Hine , Wim Pyckhout-Hintzen

The structural features of polystyrene brushes grafted on spherical silica nanoparticles immersed in polystyrene are investigated by means of a Monte Carlo methodology based on polymer mean field theory. The nanoparticle radii (either 8 nm…

Soft Condensed Matter · Physics 2014-01-17 Georgios G. Vogiatzis , Doros N. Theodorou

The structure of an adsorption octadecanamide film at the planar toluene-water interface is studied by X-ray reflectometry using synchrotron radiation with photon energy of 15 keV. The electron density (polarizability) profiles, according…

Soft Condensed Matter · Physics 2020-04-22 Aleksey M. Tikhonov , Yurii O. Volkov

We apply specular and off-specular neutron reflection at the hydrophobic silicon/water interface to check for evidence of nanoscopic air bubbles whose presence is claimed after an ad hoc procedure of solvent exchange. Nanobubbles and/or a…

Soft Condensed Matter · Physics 2017-10-13 Philipp Gutfreund , Marco Maccarini , Andrew Dennison , Max Wolff

Compact layers containing embedded semiconductor particles consolidated using pulsed electric current sintering exhibit intense, broadband near-infrared reflectance. The composites consolidated from nano- or micro-silica powder have a…

Explicit molecular dynamics simulations were applied to a pair of amorphous silica nanoparticles of diameter 3.2 nm immersed in a background electrolyte. Mean forces acting between the pair of silica nanoparticles were extracted at four…

Chemical Physics · Physics 2007-09-11 S. Jenkins , S. R. Kirk , M. Persson , J. Carlen , Z. Abbas

We investigate the conformation, position, and dynamics of core-shell nanoparticles (CSNPs) composed of a silica core encapsulated in a cross-linked poly-N-isopropylacrylamide shell at a water-oil interface for a systematic range of core…

Soft Condensed Matter · Physics 2018-09-07 Siddarth A. Vasudevan , Astrid Rauh , Martin Kröger , Matthias Karg , Lucio Isa

Colloidal particles or nanoparticles, with equal affinity for two fluids, are known to adsorb irreversibly to the fluid-fluid interface. We present large-scale computer simulations of the demixing of a binary solvent containing such…

Soft Condensed Matter · Physics 2007-05-23 K. Stratford , R. Adhikari , I. Pagonabarraga , J. -C. Desplat , M. E. Cates

The process of colloidal drying gives way to particle self-assembly in numerous elds including photonics or biotechnology. Yet, the mechanisms and conditions driving the nal particle arrangement in dry colloidal layers remain elusive. Here,…

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