Materials Literature
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Lead-free (K0.48Na0.48Li0.04)(Nb0.775Ta0.225)O3 (KNLNT) thin films were deposited on Pt(111)/Ti/SiO2/Si(001) substrates using pulsed laser deposition. The film exhibited a well-defined ferroelectric hysteresis loop with a remnant polarization 2Pr of 22.6 μC/cm2 and a coercive field Ec of 10.3 kV/mm. The effective piez…
Carbon nanotubes wrapped by polysaccharide chains like chitosan (CHTS) or its derivatives through noncovalent decoration have been shown to condense effectively and deliver DNA for gene therapy. Despite the importance of these novel nanoscale materials, the detail of the microscopic structure and underlying interactio…
Temperature-dependent gas-phase reaction kinetics measurements and equilibrium thermodynamics under multicollision conditions in conjunction with ab initio DFT calculations were employed to determine the binding energies of carbon monoxide to triatomic silver-gold binary cluster cations and anions. The binding energie…
This work shows that the recently described Escherichia coli BtuE peroxidase protects the bacterium against oxidative stress that is generated by tellurite and by other reactive oxygen species elicitors (ROS). Cells lacking btuE (ΔbtuE) displayed higher sensitivity to K(2)TeO(3) and other oxidative stress-generating a…
Magnetic particles serve as an important tool for a variety of biomedical applications but often lack uniformity in their magnetic responsiveness. For quantitative analysis studies, magnetic particles should ideally be monodisperse and possess uniform magnetic properties. Here we fabricate magnetically uniform Janus p…
Density functional theory computations were performed to investigatethe surface and edge effects on the structural and electronic properties of wurtzite GaN nanoribbons. For 2D GaN sheets terminated with (0001) direction, the surface effect is dominant and leads to a semiconductor-to-metal transition in both bare and…
Amorphous silicon carbonitride (SiCN) ceramics were synthesized by pyrolyzing a polysilazane at different temperatures between 900° and 1400°C. The microstructures and compositions of the materials obtained were analyzed using X‐ray diffraction, elemental analysis, and Raman spectroscopy. To study their piezoresistive…
In this work, we found that a desirable amount of oxygen can reduce defect related scattering in enhancing carrier mobility for pulsed laser deposited zinc oxide. However, excessive oxygen can lead to formation of oxygen interstitials that can act as compensation or scattering centers. At higher oxygen pressures, stru…
Abstract In this paper, a typical Li‐ and Ta/Sb‐modified alkaline niobate‐based ceramics prepared by conventional sintering were investigated in terms of different sintering temperatures and dwelling times. Compositional segregation phenomenon is found to exist in the alkaline niobate‐based ceramics sintered at the te…
Abstract We report on the effect of processing conditions on rheology, thermal and electrical properties of nanocomposites containing 0.02–0.3 wt % multiwall carbon nanotubes in an epoxy resin. The influence of the sonication, the surface functionalization during mixing, as well as the application of external magnetic…
The thermal stability and electronic structures of two dimensional Cx(BN)y compounds are studied using first-principles calculations based on the density functional theory. Although, from total energy calculations, it was well-established that phase-segregated atomic arrangements had the lowest energy, we found that d…
A bifunctional peptide coating was designed, synthesized, and evaluated as a potential pro-healing stent coating. The bifunctional peptide consisted of a short 28-mer sequence that on the N-terminus has a motif with affinity for polystyrene binding and at the C-terminus has a motif that was shown to bind selectively h…
Through precise control of nanoscale building blocks, such as proteins and polyamines, silica condensing microorganisms are able to create intricate mineral structures displaying hierarchical features from nano- to millimeter-length scales. The creation of artificial structures of similar characteristics is facilitate…
Abstract During the production of grape wine, the occurrence of thick leathery pellicle at the air‐liquid interface was found as a contaminant. The pellicle produced was investigated with a view to use as biodegradable polymer. The bacterium that is responsible for the pellicle production was isolated, characterized a…
We experimentally demonstrate planar plasmonic THz waveguides using metal films that are periodically perforated with complementary split ring resonators (CSRRs). The waveguide transmission spectra exhibit numerous transmission resonances. While the geometry is commonly used in developing negative index materials, the…
Abstract The Zn 1– x Ni x O (0 ≥ x ≥ 0.1) systems were synthesized by a solid‐state reaction technique at 700 °C for 7 h. The X‐ray diffraction (XRD) pattern reveals the presence of secondary peaks due to NiO in Ni overdoped (>0.03) ZnO matrix. The compositional mapping on 5% Ni‐doped ZnO on an electron probe micro…
A single-step process to polymer nanofiber meshes that possess biofunctional peptide segments on their surfaces is described here, which requires a standard electrospinning setup only. Spinning a homogeneous mixture composed of a valuable polymer−peptide conjugate (poly(lactic acid)- block -CGGRGDS) and a biocompatibl…
Abstract In this study, poly(lactic acid) (PLA) was blended with chemically modified thermoplastic starch (CMPS) in a twin‐screw extruder. The characteristic properties of PLA/CMPS blends were investigated by observing the morphology, thermal, and mechanical properties, and biodegradability. Differential scanning calo…
Using density functional theory, it is shown that titanium doped heterofullerene has superior property of hydrogen storage. The single titanium atom lies at a double bond position of C60 and bonds to four carbons by Dewar interaction. Each titanium atom binds up to six hydrogen molecules. The first and second hydrogen…
This contribution is devoted to the formulation and numerical implementation of a ductile damage constitutive model enriched with a thermodynamically consistent nonlocal theory of integral type. In order to describe ductile deformation, the model takes finite strains into account. To model elasticity, a Hencky-like hy…