Materials Literature
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The photostabilization of poly(methyl methacrylate) (PMMA) films by new types of 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole with Sn(II), Ni(II), Zn(II), and Cu(II) complexes was investigated. The PMMA films containing concentration of complexes 0.5% by weight were produced by the casting method from chloroform solven…
We study quantum transport in a general graphene system subject to external potential, a situation that can be expected in all kinds of future graphene-based electronic devices with quantum dots and quantum point contacts. We find that electrons tend to take on propagating paths due to Klein tunneling that have absolu…
We report here the results from theoretical calculations of the potential energy curves, the geometry optimizations, and the electronic structures for three dimers of lithium phthalocyanine (LiPc) by using three types of functional systems: PBE1PBE, B3LYP, and M06. The results were discussed in comparison with those o…
Based on the linear coordinate transformation method, two-dimensional and three-dimensional electromagnetic transparent devices with diamond shape composed of homogeneous and non-singular materials are proposed in this paper. The permittivity and permeability tensors of the transparent devices are derived. The perform…
By using the Boltzmann formalism, we show that carrier multiplication by impact ionization can take place at relatively low electric fields during electronic transport in graphene. Because of the absence of an energy gap, this effect is not characterized by a field threshold but is a quadratic function of the electric…
Abstract The melting behaviors and crystal structures of a long alkyl chain polyamide and nylon 18 18, were investigated under annealing and isothermal crystallization conditions. Nylon 18 18 showed multiple melting peaks in differential scanning calorimetry (DSC) thermograms depending on thermal history of the sample…
The thermal conductivities of molten (Na–K)Cl systems have been evaluated using equilibrium molecular dynamics simulation within the framework of Fumi–Tosi potential models. An expression for the thermal conductivity of binary ionic mixtures was derived from the phenomenological equations between flux densities and th…
We present a study of crystalline CCl(4) spanning up to 10 orders of magnitude in time at temperatures ranging from 160 K to 190 K using molecular dynamics simulations. The relaxation process is studied using angular self correlation functions. The results show that each of the four nonequivalent molecules of the mono…
Abstract Four new thioantimonates(III) with compositions [(C 3 H 10 NO)(C 3 H 10 N)][Sb 8 S 13 ] ( 1 ) (C 3 H 9 NO = 1‐amino‐3‐propanol, C 3 H 9 N = propylamine), [(C 2 H 8 NO)(C 2 H 8 N)(CH 5 N)][Sb 8 S 13 ] ( 2 ) (C 2 H 7 NO = ethanolamine, C 2 H 7 N = ethylamine, CH 5 N = methylamine), [(C 6 H 16 N 2 )(C 6 H 14 N 2…
Nephrogenic systemic fibrosis (NSF), previously known as nephrogenic fibrosing dermopathy, is a generalized fibrotic disorder occurring in people with renal failure, following exposure to gadolinium-based contrast agents used to enhance MRI. The cellular elements involved in pathology of NSF include bone-marrow-derive…
The low-energy phonons of two different graphite intercalation compounds (GICs) have been measured as a function of temperature using inelastic x-ray scattering (IXS). In the case of the non-superconductor BaC${}_{6}$, the phonons observed are significantly higher (up to 20%) in energy than those predicted by theory,…
Abstract In situ melt dynamic vulcanization process has been employed to prepare electrically conductive polypropylene (PP)/ethylene–propylene–diene rubber (EPDM) (40/60 wt %) thermoplastic vulcanizates (TPVs) incorporated by expanded graphite (EG) as a conductive filler. Maleic anhydride grafted PP (PP‐g‐MAH) was use…
PMLA nanoparticles with diameters of 150-250 nm are prepared, and their hydrolytic degradation is studied under physiological conditions. Degradation occurs by hydrolysis of the side chain methyl ester followed by cleavage of the main-chain ester group with methanol and L-malic acid as the final degradation products.…
We report on an in-situ monitoring of graphite oxidation using a high temperature environmental scanning electron microscope. A morphological transition is clearly identified around 1040 K between hexagonal pits at low temperatures and circular pits at high temperatures, with apparently no change in the kinetic law. A…
RF sputtered amorphous Pb(Zr0.52Ti0.48)O3 (PZT) films (∼300–350 nm in thickness) on {111}Pt/Ti/SiO2/Si or {001}PbTiO3/Pt/Ti/SiO2/Si substrates were laser crystallized to obtain highly textured {111} and {001} PZT thin films. The measured remanent polarizations and coercive fields were 31 µC/cm2 and 86 kV/cm for {001}…
We report on the possibility of switching the emission rate of photoelectrons by polarization changes in the plasmon excitation light. Photoelectron emission is strongly enhanced in the near-field of localized surface plasmons and occurs from areas with typical diameters of 20-70 nm. The underlying physical process in…
The preparation of biodegradable nanomaterials by blending starch nanocrystals with various polymer matrices are the most active research. This work reports aspect related to nano-sized particles of jackfruit seed. This approach is simple, faster, eco-friendly, cost effective and suitable for large scale production. X…
Abstract The synergistic effects of titanium dioxide (TiO 2 ) with layered double hydroxides (LDH) in ethylene vinyl acetate copolymer/LDH (EVA/LDH) composites have been studied using thermogravimetric analysis (TGA), limiting oxygen index (LOI), UL‐94 tests, and cone calorimeter test (CCT). The results from the UL‐94…
In situ forming physical hydrogels are formed through a biologically benign reaction between two multi-arm macromers, one containing terminal thiol and the other containing terminal vinyl sulfone groups. One macromer is self-assembled through a coiled-coil domain; and the physical junction of this macromer confers the…
Abstract Antibacterial efficacies of various thermoplastics, such as medium‐density polyethylene (MDPE), polystyrene (PS), polyethylene terephthalate (PET) and polyvinyl chloride (PVC) containing nano‐silver colloids were studied under a wide range of testing conditions. The effects of nano‐silver colloid content and…