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The effects of particle shape on the vibrational properties of colloidal glasses are studied experimentally. 'Ellipsoidal glasses' are created by stretching polystyrene spheres to different aspect ratios and then suspending the resulting…

软凝聚态物质 · 物理学 2015-05-20 Peter J. Yunker , Ke Chen , Zexin Zhang , Wouter G. Ellenbroek , Andrea J. Liu , A. G. Yodh

We review some recent results on finite dimensional spin glasses by studying recent numerical simulations and their relationship with experiments. In particular we will show results obtained at zero and non zero temperature, focusing in the…

凝聚态物理 · 物理学 2009-09-29 J. J. Ruiz-Lorenzo

In this paper, small-angle X-ray scattering measurements are used to determine the different compressibility contributions, as well as the isothermal compressibility, in thermal equilibrium in silica glasses having different thermal…

无序系统与神经网络 · 物理学 2009-11-11 Claire Levelut , Annelise Faivre , Rozenn Le Parc , Bernard Champagnon , Jean-Louis Hazemann , Jean-Paul Simon

We present direct experimental observation of the morphological evolution during the formation of nanogratings with sub-100-nm periods with the increasing number of pulses. Theoretical simulation shows that the constructive interference of…

光学 · 物理学 2023-07-19 Yang Liao , Wangjun Pan , Yun Cui , Lingling Qiao , Yves Bellouard , Koji Sugioka , Ya Cheng

Synthesis and research of the properties of boron nitride powders and BN powders with additives produced under effect of concentrated light in a flow of nitrogen in a xenon high-flux optical furnace are presented. A scanning and…

Tin-containing nanocrystals, embedded in silicon, have been fabricated by growing an epitaxial layer of Si_{1-x-y}Sn_{x}C_{y}, where x = 1.6 % and y = 0.04 %, followed by annealing at various temperatures ranging from 650 to 900 degrees C.…

Self assembled AlN nanowires (NWs) are grown by plasma assisted molecular beam epitaxy (PAMBE) on SiO2 / Si (111) substrates. Using a combination of in-situ reflective high energy electron diffraction and ex situ X ray diffraction (XRD), we…

材料科学 · 物理学 2024-02-02 Ž. Gačević , J. Grandal , Q. Guo , R. Kirste , M. Varela , Z. Sitar , M. A. Sánchez García

Nanostructured materials formed via kinetically controlled self-assembly processes gather more interest nowadays. Bicontinuous emulsion gels stabilized by colloidal particles, called bijels, are attractive materials in soft-matter as they…

Nanoparticle-polymer composite gratings incorporating ultrahigh-refractive-index hyperbranched polymers as organic nanoparticles have demonstrated exceptional light optical properties, yet their potential for neutron diffraction…

We present a study of the structural properties of (x)Na$_2$S-(1-x)GeS$_2$ glasses through DFT-based molecular dynamics simulations, at different sodium concentrations ($0<x<0.5$). We computed the radial pair correlation functions as well…

无序系统与神经网络 · 物理学 2009-11-11 Sebastien Blaineau , Philippe Jund

The nanostructure of hydrogenated amorphous silicon (a Si:H) is studied by a combination of small-angle X-ray (SAXS) and neutron scattering (SANS) with a spatial resolution of 0.8 nm. The a-Si:H materials were deposited using a range of…

材料科学 · 物理学 2020-11-04 Eike Gericke , Jimmy Melskens , Robert Wendt , Markus Wollgarten , Armin Hoell , Klaus Lips

We speculate that glass-forming liquids may contain fairly large and well-defined crystallites. This is based on arguing that the slowly relaxing "frozen-in" stresses characterizing ultraviscous liquids increase the barrier for nucleation,…

软凝聚态物质 · 物理学 2007-05-23 Jeppe C. Dyre

Motivated by recent experimental results on glassy polymer nanoparticles, we develop a minimal theoretical framework for the glass transition in spherical confinement. This is accomplished using our cooperative-string model for supercooled…

统计力学 · 物理学 2017-04-12 Maxence Arutkin , Elie Raphaël , James A. Forrest , Thomas Salez

We report on the formation and the structural properties of supermicellar aggregates also called electrostatic complexes, made from mineral nanoparticles and polyelectrolyte-neutral block copolymers in aqueous solutions. The mineral…

软凝聚态物质 · 物理学 2007-09-10 Jean-Francois Berret , Kazuhiko Yokota , Mikel Morvan , Ralf Schweins

The glass-forming ability is an important material property for manufacturing glasses and understanding the long-standing glass transition problem. Because of the nonequilibrium nature, it is difficult to develop the theory for it. Here we…

软凝聚态物质 · 物理学 2021-01-26 Yunhuan Nie , Jun Liu , Jialing Guo , Ning Xu

The aging of a nanocrystalline equiatomic ZnSe alloy produced by mechanical alloying was investigated using X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques. The measured XRD patterns showed that Se atoms…

材料科学 · 物理学 2009-11-07 K. D. Machado , J. C. de Lima , T. A. Grandi , C. E. M. de Campos , A. A. M. Gasperini

The temperature dependence of the x-ray scattering in the region below the first sharp diffraction peak was measured for silica glasses with low and high OH content (GE-124 and Corning 7980). Data were obtained upon scanning the temperature…

无序系统与神经网络 · 物理学 2016-08-16 Ralf Brüning , Claire Levelut , Annelise Faivre , Rozenn Le Parc , Jean-Paul Simon , Françoise Bley , Jean-Louis Hazemann

Using non-contact scanning probe microscopy (SPM) techniques, dielectric properties were studied on 50 nanometer length scales in poly-vinyl-acetate (PVAc) films in the vicinity of the glass transition. Low frequency (1/f) noise observed in…

无序系统与神经网络 · 物理学 2009-10-31 E. Vidal Russell , N. E. Israeloff , L. E. Walther , H. Alvarez Gomariz

Inspired by structural colors in avian species, various synthetic strategies have been developed to produce non-iridescent, saturated colors using nanoparticle assemblies. Mixtures of nanoparticles varying in particle chemistry (or complex…

Multilayer structures on the basis of n-type (In,Fe)Sb and p-type (Ga,Fe)Sb diluted magnetic semiconductors (DMS) along with separate (In,Fe)Sb and (Ga,Fe)Sb layers were fabricated on GaAs substrates by pulsed laser sputtering of InSb,…