Materials Literature
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Fast Switching of Vertical Alignment Liquid Crystal Cells with Liquid Crystalline Polymer Networks, Baek, Jong-In, Kim, Ki-Han, Kim, Jae Chang, Yoon, Tae-Hoon, Woo, Hwa Sung, Shin, Sung Tae, Souk, Jun Hyung
Abstract Polymer grafting is a widely used technique in modifying the properties of cellulose fibers. Many methods, such as free radical, esterification reactions and layer‐by‐layer adsorption, have been applied for grafting polymer on different substrates. In this study, a facile method to graft biodegradable starch…
Unique low-dimensional SiO(2)-based nanomaterials can be encapsulated and synthesized inside the nanometer-scale one-dimensional internal spaces of carbon nanotubes (CNTs). In this study, various single-walled CNTs (SWNTs) and double-walled CNTs (DWNTs) having different diameters are used as containers for cubic octam…
Different parts of a sandpile can exhibit very different dynamical behaviors ranging from jammed to fluid. To understand them, one needs to look at the networks of contacts between individual grains.
We consider the possibility of the existence of media in acoustics that are similar in several effects to the widely discussed electrodynamic left-handed media. The density and compressibility of a medium are shown to be the mechanical analogues of negative permittivity and permeability. We discuss the physical meanin…
In this work, we propose an efficient multi-mesh adaptive finite element method for simulating the dendritic growth in two- and three-dimensions. The governing equations used are the phase field model, where the regularity behaviors of the relevant dependent variables, namely the thermal field function and the phase f…
The nature of charge carriers in degraded SrTiO 3 is studied by using impedance spectroscopy (IS) and electron energy loss spectroscopy (EELS). Impedance response from the degraded crystal is fitted with a modified three-element lumped circuit, and these three elements represent a leaky anode capacitance (p-type condu…
Abstract Zwitterionic and cationic polyelectrolyte brushes were prepared by surface‐initiated atom transfer radical polymerization of 2‐methacryloyloxy‐ ethyl phosphorylcholine (MPC) and 2‐( N,N ‐dimethylamino)ethyl methacrylate (DMAEMA), respectively. The poly(DMAEMA) brush was treated with methyl iodide to form poly…
This paper employs a first-principles total-energy method to investigate the theoretical tensile strengths of bcc and fcc Fe systemically. It indicates that the theoretical tensile strengths are shown to be 12.4, 32.7, 27.5 GPa for bcc Fe, and 48.1, 34.6, 51.2 GPa for fcc Fe in the [001], [110] and [111] directions, r…
Abstract This contribution presents a new strategy to grow nonfouling poly (poly(ethylene glycol)methacrylate) (PPEGMA) brushes from polydimethylsiloxane (PDMS) substrates. The strategy presented here is based on the use of a sequence of vapor deposition/hydrolysis cycles to generate a surface‐confined atom transfer r…
A combinatorial topological analysis is carried out by means of the program package TOPOS4.0 [Blatov (2006), IUCr Comput. Commun. Newsl. 7, 4-38] and the matrix self-assembly is modeled for crystal structures of the ZrZn22 family (space group Fd3m, Pearson code cF184), including the compounds with superstructural orde…
ZnO nanostructures were grown via carbothermal reduction vapor phase transport with carbon black, activated carbon, and graphite powders. Nanostructures can be grown at significantly lower temperatures with carbon black and activated carbon, although with different morphologies compared to graphite. The surface areas…
Abstract The passive films formed on the 9%Cr, 0.1%C, microcomposite steels (ASTM A1035) in highly alkaline environments, such as concrete pore solutions, were studied. In-situ surface-enhanced Raman spectroscopy (SERS) was conducted during cyclic potentiodynamic polarization experiments to characterize the formation…
Abstract This article describes the recovery of silk sericin from three different degumming liquors, that is, high temperature high pressure (HTHP), alkaline, and soap plus alkali (SPA), using membrane filtration technology. The recovery of sericin by membrane technology results in the reduction of about 78–85% chemic…
A recent survey of the non-marine diatoms from seepage areas on James Ross Island (Antarctic Peninsula Region) resulted in the discovery of three new diatom species belonging to the genera Diadesmis, Eolimna and Luticola. Based on both light and scanning electron microscopical observations, these species were describe…
We study the superfluid density of the ± s -wave state of the minimal two-band model for the Fe-based superconductors and its evolution with impurity concentration. We show that the impurity scattering of the strong-coupling limit induces the self-energy of a generic form ImΣ imp (ω)≈ i γ+ i βω beyond a critical impur…
In order to provide an accurate estimate of a circuit breaker's remaining lifetime, reliable measurements of ageing and failure characteristics and condition monitoring, are necessary. In order to obtain this documentation, it is necessary to monitor the performance parameters which are most sensitive to aging. Follow…
Pd nanoparticle/functionalized CNF composites were synthesized by a two-step chemical vapor deposition of Pd(allyl)(Cp) as precursor at atmospheric pressure. Online mass spectrometry was used to measure the gas fragments during the two-step CVD. The functionalized CNFs and the resulting composites were characterized b…
The properties of many electronic materials are governed by defect type, distribution, and concentration. In this paper, we demonstrate the influence of equilibrated nonstoichiometry on the ferroelectric properties of the perovskite BaTiO3. It is shown from measurements of the transition temperature, thermal hysteresi…
We study the formation of plasmon modes of small gold clusters by modeling the excitation spectra. The shape change of the longitudinal mode as a function of cluster size is studied using time-dependent Kohn-Sham theory and Gaussian basis sets. The presence of d electrons in gold atoms affect the plasmon formation pro…