Materials Literature
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We study the vibrational spectra of one-dimensional statically compressed granular crystals (arrays of elastic particles in contact) containing defects. We focus on the prototypical settings of one or two spherical defects (particles of smaller radii) interspersed in a chain of larger uniform spherical particles. We m…
The recent discovery of topological insulators has revived interest in the topological properties of insulating band structures. In this work, we extend the topological classification of insulating band structures to include certain point group symmetry of crystals. We find a class of three-dimensional "topological cr…
This appendix to the paper by Werpachowska and Dietl "Theory of spin waves in ferromagnetic (Ga,Mn)As" (DOI: 10.1103/PhysRevB.82.085204) is a response to inquiries about the derivation of the Loewdin calculus and its numerical implementation. It presents the detailed version of the Loewdin calculus for the multiband H…
Organoclays are composites of alkylammonium organic cations that are electrostatically bonded to clay minerals. Organoclays have shown promise as sorptive media in a variety of contaminant containment applications; however, many of their fundamental physical, mechanical, and chemical behaviors have not been quantified…
The correction factor developed by Jann and Deppe ( 1990 ) to adjust the measured perforator values of particleboards and fibreboards measured at different moisture contents in the range of 3% ≤ u ≤ 9% to the level at 6.5% moisture content has two main deficiencies. It takes no account of the influence of the molar ra…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTTemperature−Pressure Superposition in SANS χ for an A-b-B Diblock CopolymerJumi Lee†, Du Yeol Ryu*‡, and Junhan Cho*†View Author Information† Department of Polymer Science & Engineering and Center for Photofunctional Energy Materials, Dankook University, 126 Jukjeon-dong, Suji-…
Abstract In this paper we report a chemical method named coordination reaction method to synthesize ZnO nanowire arreys. ZnO nanowires with the diameter about 80nm were successfully fabricated in the channels of the porous anodic alumina (PAA) template by the above coordination reaction method. The microstructures of…
Density functional theory computations were performed to investigate hydrogen adsorption in metaldecorated defective BN nanosheets. The binding energies of Ca and Sc on pristine BN nanosheets are much lower than the corresponding cohesive energies of the bulk metals; however, B vacancies in BN nanosheets enhance the b…
This study investigated the mechanical properties of vibrating cantilevered multiwall carbon nanotubes in terms of energy loss in a vibrating nanotube. Young's moduli of the nanotubes show a clear dependence of the perfection of the sp(2) carbon network, as determined from Raman spectroscopy. The energy loss correspon…
We report results from a comprehensive set of experiments to study coherently controlled electrical current injection in single-walled carbon nanotubes (SWNTs) and graphite. Photocurrents were injected at room temperature through the quantum interference of single- and two-photon absorption pathways induced by 150-fs…
Here we investigate high frequency AC transport through narrow graphene nanoribbons with top-gate potentials that form a localized quantum dot. We show that as a consequence of the finite dwell time of an electron inside the quantum dot (QD), the QD behaves like a classical inductor at sufficiently high frequencies ω…
We studied hydrogen-bonding assemblies in a series of dumbbell-shaped hydrazine derivatives, namely oxalyl N',N'-bis(3,4-dialkoxybenzoyl)-hydrazide (BFH-n, n = 4, 6, 8, 10) and oxalyl N',N'-dibenzoyl-hydrazide (FH-0). It has been demonstrated that NH-1 protons of BFH-n precipitated from tetrahydrofuran (THF) or dimeth…
The gaseous pollutant, nitric oxide, is produced in almost every combustor but can be converted back to molecular N 2 by reacting it with metallic iron in (I) In fuel-rich regions of a combustor, the product, iron oxide, can be chemically reduced to metallic Fe (for subsequent reuse) by, e.g., carbon monoxide in (II)…
Advanced materials are recently gaining importance as replacements for conventional materials and as facilitators of new and distinctive products. These materials have had a considerable impact on the development of a wide range of strategic technologies and offer greater potential for rapid technological advance and…
Abstract Glass formation region in the V 2 O 5 ‐MoO 3 ‐ZnO system was determined using low cooling rates (10 2 K/s). The glasses were obtained in the central part of the system from compositions containing 10‐65 mol% V 2 O 5 , 10‐65 mol% MoO 3 and 10‐50 mol% ZnO. The amorphous and crystalline phases were characterized…
Abstract A straightforward method, which is termed novel handspinning , is reported for producing uniaxially aligned sPP nanofibers. As demonstrated by SEM analysis, the morphologies of handspun sPP nanofibers are strongly dependent upon the processing conditions such as spinning method and solvent system. Compared to…
Dielectric relaxation caused by the segmental motion of poly(vinylpyrrolidone) (PVP) was studied in chloroform solutions with 5−40 wt % PVP at temperatures between 298 and 210 K above the melting temperature of chloroform (210 K) to obtain information on the dynamics of hydrophilic polymer. The asymmetric broadening o…
In this paper we have investigated the role of the Er-O interaction on the photoluminescence properties of Er-doped crystalline silicon. We demonstrate that the strong Er-O interaction leads to an O redistribution after thermal treatment. In particular, in the absence of Er, O out-diffuses from the Si surface and a de…
Abstract Glasses doped with rare earth (RE) ions are widely studied due to the numerous applications of these systems (active media for solid state lasers, optical telecommunication, non‐linear optical materials, electro‐optic devices, etc.). Boron trioxide, B 2 O 3 , is a known glass forming oxide with a relative low…
The storage of hydrogen in the condensed state in high-pressure vessels is dangerous, and it is impossible to store a large amount of hydrogen using adsorbents in normal ambient conditions. In order to overcome these problems, we designed a nanocapsule and investigated it with the help of the molecular dynamics simula…