Materials Literature
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We propose an optimized method to demagnetize ferromagnetic specimen taking into account its particularities. Based on a static algebraic model for magnetic hysteresis we calculated a demagnetization function which considers the reversible and irreversible processes during the passage through the hysteretic loops into…
Although PVDF/PMMA blends have been studied extensively, the phase behavior as a function of melt quenching conditions has not been examined in detail in the past. In this paper we report our results on the isotropic blends of PVDF/PMMA quenched into ice water as well as on a casting roll set at 30°C in all compositio…
We have successfully synthesized flower-like gold nanomaterials and Fe3O4/Au composite nanomaterials through the use of wet chemical methods in aqueous solution. In the presence of 0.5 mM citrate, 0.313 mM poly(ethylene glycol), and 109.72 mM sodium acetate (NaOAc), we prepared Au nanoflowers (NFs) having diameters ra…
A aplicação de polímeros biorreabsorvíveis em próteses temporárias é constante nos procedimentos médicos relacionados a fraturas ósseas. Dentre os polímeros bioreabsorvíveis, o poli(L-co-D, L ácido láctico), PLDLA, na relação 70:30, tem sido estudado visando à obtenção de placas e parafusos para a recuperação de traum…
An electrostatic-force-directed-assembly technique was used to coat multiwalled carbon nano-tubes (MWCNTs) with aerosol Ag nanoparticles produced from a mini-arc plasma source. The deposition of Ag nanoparticles onto CNTs was confirmed by transmission electron microscopy (TEM), high-resolution TEM, scanning electron m…
The interface behavior may significantly influence the mechanical properties of carbon nanotube (CNT)-reinforced composites due to the large interface area per unit volume at the composite. The modeling of CNT/polymer interfaces has been a challenge in the continuum modeling of CNT-reinforced composites. This paper pr…
The interaction of two water soluble phthalocyanines, cobalt(II) 4,4 ,4 ,4 -tetrasulfo-phthalocyanine (CoTsPc) and iron(II) 4,4 ,4 ,4 -tetrasulfo-phthalocyanine (FeTsPc), and one water soluble porphyrin, tetra sodium meso-tetrakis(p-sulfophenyl)porphyrin (TSPP), with calf thymus DNA has been studied by UV-Vis spectros…
This paper reports on a systematic system of the effects of Mn and Cr substitution on the magnetomechanical properties of cobalt ferrites, which hold promise for non-contact stress sensing applications due to their strong magnetomechanical coupling. Magnetomechanical tests were performed on sintered bulk CoMnxFe2-xO4a…
The electron spin resonance (ESR) system which covers the magnetic field region up to 16 T, the quasicontinuous frequency region from 60 to 700 GHz, the temperature region from 1.8 to 4.2 K, and the hydrostatic pressure region up to 1.1 GPa has been developed. This is the first pulsed high-field and multifrequency ESR…
O desenvolvimento de biofilmes tem crescido devido à possibilidade de substituição parcial de materiais plásticos não biodegradáveis. Proteínas e polissacarídeos têm sido utilizados para a produção de filmes com boas propriedades mecânicas. Porém, filmes a partir desses materiais apresentam alta permeabilidade ao vapo…
Abstract New lanthanide chalcogenidostannates [Ln 2 (en) 6 ( μ 2 ‐OH) 2 ][Sn 2 S 6 ] (Ln = Dy ( 1 ), Er ( 2 )) and [Dy 2 (en) 6 ( μ 2 ‐OH) 2 ][Sn 2 Se 6 ] ( 3 ) (en = ethylenediamine) were synthesized by reactions of SnCl 4 and S (or Se) with Ln 2 O 3 oxides under the mild solvothermal conditions. Compounds 1‐3 are is…
The surface of a nanofiber that is formed from a self-assembling pseudopeptide has been decorated by gold and silver nanoparticles that are stabilized by a dipeptide. Transmission electron microscopic images make the decoration visible. In this paper, a new strategy of mineralizing a pseudopeptide based nanofiber by g…
Abstract The properties of Nd 2 CoMnO 6+ δ ( δ up to 0.12) were investigated by means of neutron powder diffraction and magnetization measurements. It is found that the samples exhibit partial ordering of Co and Mn ions which strongly affects the magnetic properties. Ionic disorder increases with the oxygen content. A…
SQUID magnetometry and electron magnetic resonance (EMR) spectroscopy at 9.28 GHz were employed to probe magnetism and surface spin disorder in Fe3O4nanoparticles. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis showed magnetite particles with size sime8 nm. Magnetization (M) versus tempera…
In this paper, the vibrational characteristics of higher modes of single-walled carbon-nanotube (SWNT) modeled as the continuum axisymmetric cylinder are studied in both time and frequency domains. The modeling of SWNT for the high frequency dynamic analysis is done using the wavelet based spectral element method and…
Abstract Colloidal dispersions of polymer-protected Pd/Ag/Rh trimetallic nanoparticles were synthesized via self-organization by mixing colloidal dispersions of polymer-protected Rh nanoparticles with those of polymer-protected Pd/Ag bimetallic nanoparticles with a core–shell (Pd-core/Ag-shell) structure, which were p…
The crystal–melt equilibria in complex 15 component simulated high‐level waste (HLW) glass melts are modeled on the basis of quasicrystalline concepts. A pseudobinary phase diagram between a transition metal ferrite spinel (an incongruent melt product of transition metal iron‐rich acmite) and nepheline is defined in P…
The carbon nanotube (CNT) bundle is a promising candidate for next-generation interconnect/via applications. A realistic CNT bundle is a mixture of single-wall and multi-wall CNTs and its performance analysis needs to consider both kinds of CNTs. The inductances of the mixed CNT bundles are estimated, which are in agr…
Electrospinning is one of the simplest techniques for obtaining polymer nano fibers. Nanofibers have large surface area to volume ratio and hence have excellent application potential in sensors, filter design etc. Polyaniline (PANI) is the well-known and widely studied conducting polymer, which however, is insoluble i…
Tension structures continue to be of increasing importance to military applications requiring minimal weight, small packaging volumes and enhanced deployment operations. Presently, design methods for inflated fabric structures are not well established. Analysis tools for their efficient design lag behind those for con…