Materials Literature
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Citric acid was used as a compatibilizer in the production of starch and PBAT films plasticized with glycerol and processed by blow extrusion. Films produced were characterized by WVP, mechanical properties, FT-IR-ATR and SEM. WPV ranged from 3.71 to 12.73×10-11 g m-1 s-1 Pa-1, while tensile strength and elongation at…
We study theoretically the possibility of performing temporal differentiation of optical signals using a resonant diffraction grating. We demonstrate that the resonant grating allows the calculation of the first-order derivative of an optical signal envelope in the vicinity of waveguide resonant frequencies in the zer…
Electronic structure calculations using local density and generalized gradient (LDA/GGA) approximations for the full Heusler compound Fe${}_{2}$VAl show that it is a pseudogap (negative gap) system with very small density of states (DOS) at the Fermi level but rapidly rising DOS away from it, a feature that makes this…
Energy absorption geometric progression (GP) fitting parameters and the corresponding buildup factors have been computed for human organs and tissues, such as adipose tissue, blood (whole), cortical bone, brain (grey/white matter), breast tissue, eye lens, lung tissue, skeletal muscle, ovary, testis, soft tissue, and…
By large-scale Monte Carlo simulations of semiflexible polymers in d =2 dimensions the applicability of the Kratky-Porod model is tested. This model is widely used as "standard model" for describing conformations and force vs. extension curves of stiff polymers. It is shown that semiflexible polymers in d =2 show a cr…
Nanoporous gold films containing various amounts of residual silver have been synthesized by controllable dealloying and subsequent annealing for surface-enhanced Raman scattering (SERS). It was found that the residual Ag plays an important role in the SERS effect of dealloyed nanoporous gold. More residual Ag gives r…
Using numerical simulations, we investigate the realization of self-focusing media using two-dimensional graded photonic crystals and their applications for imaging and non-imaging purposes. The two-dimensional graded photonic crystals consist of spatially varying cylindrical holes drilled in a dielectric host. By con…
Porogen leaching is a widely used and simple technique for the creation of porous scaffolds in tissue engineering. Sodium chloride (NaCl) is the most commonly used porogen, but the current grinding and sieving methods generate salt particles with huge size variations and cannot generate porogens in the submicron size…
The use of an aerosol delivery system enabled fluorine-doped tin dioxide films to be formed from monobutyltin trichloride methanolic solutions at 350-550 °C with enhanced functional properties compared with commercial standards. It was noted that small aerosol droplets (0.3 μm) gave films with better figures of merit…
We assess voltage polarity effects in phase-change memory (PCM) devices that contain Ge2Sb2Te5 (GST) as the active material through the study of vertically asymmetric pore-cell and laterally symmetric bridge-cell structures. We show that bias polarity can greatly accelerate device failure in such GST-based PCM devices…
The upconversion luminescence of Yb/Er codoped NaYF4 nanocrystals was investigated at different temperatures from 295 to 10 K. The temperature dependent luminescence intensity of the nanocrystals showed very different behaviors as compared to their bulk powders. The intensity of the green emissions initially increased…
The main hindrance in the use of polyhydroxyalkanoates (PHAs) as a replacement for existing petroleum-based plastics is their high production cost. The carbon source accounts for 50% of the cost for PHA production. Thus, increasing the yield and productivity of PHAs on cheap substrates is an important challenge for bi…
Abstract The short‐ and long‐term thermal properties, organoclay dispersion state, and the nonisothermal crystallization kinetics of organoclay based nanocomposites of poly(lactic acid) (PLA) and poly(ethylene glycol) (PEG) plasticized PLA were investigated. Differential scanning calorimetry analyses showed that plast…
Carbon nanostructures (including carbon nanofibers, nanostructured diamond, fullerene materials and so forth) possess extraordinary physiochemical, mechanical and electrical properties attractive to bioengineers and medical researchers. In the past decade, numerous developments towards the fabrication and biological s…
BACKGROUND: The ABC phenomenon is described as a syndrome of accelerated clearance of polyethylene glycol (PEG)-modified liposomes from the bloodstream when repeatedly injected, with their increased accumulation in the liver and spleen. METHODS: To clarify this immune response phenomenon, we evaluated a novel modified…
Abstract Magnesium hydroxide (Mg(OH) 2 ) nanorods were synthesized by a simple and facile hydrothermal method in the presence of cetyltetramethylammonium bromide (CTAB) as a surfactant. Nanorods of magnesium oxide MgOwere also induced by thermal decomposition of Mg(OH) 2 nanorods at 700°C, By using disk diffusion tech…
The thermoelectric properties of graphene-based antidot lattices are theoretically investigated. A third nearest-neighbor tight-binding model and a fourth nearest-neighbor force constant model are employed to study the electronic and phononic band structures of graphene antidot lattices with circular, rectangular, hex…
Gold nanoparticles (AuNPs) functionalized with a short chain amine-terminated alkanethiol (HS-(CH(2))(2)NH(2) or C2 NH(2)-thiol) are prepared via a direct synthesis method and then ligand-exchanged with a long chain amine-terminated alkanethiol (HS-(CH(2))(11)NH(2) or C11 NH(2)-thiol). Transmission electron microscopy…
A simple screening method: Phase segregation and domain formation is observed within the protecting monolayer of gold nanoparticles (AuNPs) using ion mobility mass spectrometry (IM-MS), a two-dimensional gas-phase separation technique. Experimental data are compared to a theoretical model. Deviations from this model p…
The Kinetics of Phase Transformations During Continuous Cooling of the Ti6Al4V Alloy from the Single-Phase β Range The paper reports on a study of the kinetics of phase transformations during continuous cooling of the alpha-beta Ti6Al4V titanium alloy from the β range. After cooling from 1020°C at a rate higher than c…