Materials Literature
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In this paper, a general incremental displacement based finite element formulation capable of modeling material nonlinearities based on first-order shear deformation theory (FSDT) is developed for cylindrical shape memory alloy (SMA) shells. The Boyd–Lagoudas phenomenological model with polynomial hardening in conjunc…
Nanoparticles that are responsive to multiple stimuli allow more precise control over the aggregation process and thus the structures and properties of the resulting aggregates. Au nanoparticles functionalized by poly-L-histidine (PLH), a simple polypeptide with a pK(a) value (approximately 6.2) around the physiologic…
Uniform nano-Al 2 O 3 particles were functionalized with surface amine ligands to form G0/nano-Al 2 O 3 (where G stands for dendrimer generation) and then grafted with first generation PAMAM (polyamidoamine) dendrimers to form G1/nano-Al 2 O 3 . G0/nano-Al 2 O 3 and G1/nano-Al 2 O 3 were used to tether Wilkinson’s cat…
Industrially produced hydroxypropyl methylcellulose (HPMC) is a chemically heterogeneous material, and it is thus difficult to predict parameters related to function on the basis of the polymer's average chemical values. In this study, the solution behavior of seven HPMC batches was correlated to the molecular weight,…
We report on molecular simulations of zinc oxide nanostructures obtained within silica nanopores of diameter D = 1.6 nm and D = 3.2 nm. Both the effects of confinement (by varying the pore size) and degree of pore filling on the structure of the nanomaterial are addressed. Two complementary approaches are adopted: 1)…
Catalytic material-assisted growth of alkaline-earth metal hexaboride (MB 6, M = Sr, Ba) 1D nanostructures was achieved by pyrolysis of diborane (B 2 H 6 ) over alkaline-earth metal oxide (MO) powders at elevated temperature (∼840−870 °C) and low pressure (∼165 mTorr). The as-synthesized MB 6 1D nanostructures were ch…
In this paper the electrochemical properties of polythiophene thin films synthesized on single-crystal platinum electrodes are studied. It was found that the electrochemical properties, ion transport kinetics, and morphology of the polythiophene films depend on the surface orientation of the single-crystal platinum el…
Studies of beta-sheet peptide/phospholipid interactions are important for an understanding of the folding of beta-sheet-rich membrane proteins and the action of antimicrobial and toxic peptides. Further, self-assembling peptides have numerous applications in medicine and therefore an insight is required into the relat…
The thermal decomposition of ferrocene combined with an Fe-catalyst nanostructuring on an oxidized Si substrate is investigated in the temperature range of 1015−1200 K. The optimal growth conditions for aligned and homogeneous Fe-filled carbon nanotubes are found at 1100 K. From the nanostructures the corresponding gr…
In this paper, we present the first methodology for the quantitative assessment of the amount of material encapsulated in filled carbon nanotubes. Samples of single-walled carbon nanotubes have been filled by molten-phase capillary wetting with CuI, FeCl 2, and CuBr. A suitable solvent has been used in each case to re…
The surface activity of beta-peptides is investigated using molecular simulations. The type and display of hydrophobic and hydrophilic groups on helical beta-peptides is varied systematically. Peptides with 2/3 hydrophobic groups are found to be surface active, and to adopt an orientation parallel to the air-water int…
The composition of a complex equilibrium mixture formed upon dissolution of (Se(6)I(2))[AsF(6)](2).2SO(2) in SO(2)(l) was studied by (77)Se NMR spectroscopy at -70 degrees C with both natural-abundance and enriched (77)Se-isotope samples (enrichment 92%). Both the natural-abundance and enriched NMR spectra showed the…
Oxalato-bridged divalent homometallic compounds A(2)[M(II)(2)(C(2)O(4))(3)] (M(II) = Fe(2+) (1), Co(2+) (2)) were obtained by a solvothermal method. They consist of honeycomb anions and cations, that is, the 5-oxo-1,4,7-triazabicyclo[4.3.0]non-6-en-7-yl ammonium ion (hereafter abbreviated as A(1)) in 1 and the 2-(2,3-…
We have investigated the threefold-charge ordering in ${\text{La}}_{1/3}{\text{Sr}}_{2/3}{\text{FeO}}_{3}$ sample below ${T}_{\text{CO}}$ $\ensuremath{\sim}200\text{ }\text{K}$. We have measured superlattice reflections, $q={a}^{\ensuremath{\ast}}(1/3\text{ }1/3\text{ }1/3)$, using the resonant x-ray scattering techni…
Abstract In our recent work (Grujicic et al., Int. J. Impact Eng ., 2008), various open-literature experimental findings pertaining to the ballistic behavior of soda-lime glass were used to construct a simple, physically based, high strain rate, high-pressure, large-strain mechanical model for this material. The model…
The phenomenon of silver electromigration has been examined in multilayer structures comprised of a low‐firing PZT‐based ceramic with inner Ag 1− x Pd x electrodes (0< x <0.3). Under high humidity and dc bias, the time‐to‐failure was found to increase significantly with Pd content for x >0.1. Failed samples e…
A series of new titanocene complexes was synthesized and investigated toward their gelation abilities. The first structure−property correlations for organometallic gelators could be deduced. The gels and their structural diversity were characterized by TEM, cryo-SEM, and AFM as well as CD-spectroscopy. The organometal…
Recent experimental results have shown that adding nanoparticles inside a bulk material can enhance the thermoelectric performance by reducing the thermal conductivity and increasing the Seebeck coefficient. In this paper we investigate electron scattering from nanoparticles using different models. We compare the resu…
The adsorption and desorption behavior of poly(amido amine) (PAMAM) dendrimers at the water-silica interface was investigated by optical reflectometry. Polymer desorption upon dilution was studied as a function of generation (i.e., molecular mass), solution pH, and ionic strength. Three distinct adsorption regimes upo…
We study heat transport in quantum spin systems analytically and numerically. First, we demonstrate that heat current through a two-level quantum spin system can be modulated from zero to a finite value by tuning a magnetic field. Second, we show that a spin system, consisting of two dissimilar parts---one is gapped a…