Materials Literature
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Misoriented bilayer graphene with commensurate angles shows unique magneto-optical properties. The optical absorption spectra of such a system strongly depend on the angle of rotation. For a general commensurate twist angle, the absorption spectra has a simple single-peak structure. However, our studies indicate that…
Static magnetic order of quasi-two-dimensional FeAs compounds Sr${}_{4}$$A$${}_{2}$O${}_{6\ensuremath{-}x}$Fe${}_{2}$As${}_{2}$, with $A=$ Sc and V, has been detected by $^{57}\mathrm{Fe}$ M\"ossbauer and muon spin relaxation ($\ensuremath{\mu}$SR) spectroscopies. The nonsuperconducting stoichiometric ($x=0$) $A=$ Sc…
Abstract The effect of the degree of branching (DB) of a hyperbranched polyester (GBPEX) added as a modifier of new thermosets obtained from diglycidylether of bisphenol A has been studied. The use of ytterbium triflate as cationic initiator allows the hydroxyl chain‐ends in the GBPEX to become covalently linked to th…
Abstract High‐density polyethylene (HDPE)/clay nanocomposites were prepared by melt blending process. The HDPE was mixed with different organoclays and polyethylene‐grafted‐maleic anhydride was used as a compatibiliser. A masterbatch procedure was used to obtain final organoclays concentrations of 1, 2.5 and 5 wt%. Th…
The macroscopic arrangement of one-dimensional nanowires (NWs)/nanorods is crucial for many technological applications, because of their structure-dependent physical properties. Using a simple flow-induced alignment method, reversible structural changes between aligned and random states were demonstrated in Ag NW susp…
Abstract Coarse‐grained (CG) models provide a highly efficient computational means for investigating complex processes that evolve on large length‐scales or long time‐scales. The predictive capability of these models relies upon their ability to reproduce the relevant structural properties of accurate, though prohibit…
Abstract Gel–forming fibers (GF fibers) can serve as nucleation sites to prepare calcium carbonate (CaCO 3 ) because they can adsorb large amounts of Ca 2+ due to their porous structure. In this paper, mineralization behavior of CaCO 3 on GF fibers in ethanol–water mixed solvents without any additives has been investi…
Organic materials with a high second-order optical nonlinearity have an important application for the next generation of computing, telecommunications, and other industries. Because of a high electro-optic coefficient and low dielectric constant, N-benzyl-2-methyl-4-nitroaniline (BNA) single crystals have been grown a…
Here we advocate the use of single-dot electrical and optical spectroscopy, or combinations of both, to study subtle energetic and dynamic features of colloidal core (shell) nanocrystalline quantum dots. In ensemble experiments, these features are hidden because of inhomogeneous broadening. The remarked physics of con…
Multiblock copolymer chains in implicit nonselective solvents are studied by using a Monte Carlo method, which employs a parallel tempering algorithm. Chains consisting of 120 A and 120 B monomers, arranged in three distinct microarchitectures: (10-10)12, (6-6)20, and (3-3)40, collapse to globular states upon cooling,…
We realize a unidirectional transmission by cascading two nonparallel gratings (NPGs) made of isotropic, lossless, and linear media. For a pair of orthogonal linear polarizations, one of the gratings is designed as a polarizer, which is a reflector for one polarization and a transmitter for the other; another grating…
Abstract A new type of poly(methyl acrylate)‐ co ‐(acrylic acid) (PMA‐AA) networks obtained by combining hydrogen bonding with controlled crosslinking exhibit full and rapid shape‐memory recovery. The structure, thermal properties, dynamical mechanical properties and shape‐memory effects of these networks were present…
The surface plasmon resonances of silver nanoshell particles are studied by Green's function. The nanoshell system of plasmon resonances results from the coupling of the inner and outer shell surface plasmon. The shift of the nanoshell plasmon resonances wavelength is plotted against with different dielectric environm…
This paper describes the facile synthesis of a hyperbranched poly(aryl ester) that possesses a number of porphyrin units within its globular structure. The simple procedure utilizes commercially available starting materials which after fractionation generate a series of polymers with molecular weights between 4500 and…
Topographic surface patterning of intrinsically non-adhesive P(EO-stat-PO)-based hydrogels can lead to the adhesion and spreading of fibroblasts. Explanations for this unexpected behavior are discussed, particularly with regard to non-specific protein adsorption from the serum-supplemented culture medium. The presence…
We have recently reported upon the development of crosslinked urethane-doped polyester (CUPE) network elastomers, which was motivated by the desire to overcome the drawbacks presented by crosslinked network polyesters and biodegradable polyurethanes for soft tissue engineering applications. Although the effect of the…
Sintering experiments on soda‐lime glass microspheres have been performed using spark plasma sintering in the temperature range 485°C–560°C. Samples with relative densities between 64% and 99.6% have been obtained in about 10 min. For almost fully dense samples, the microstructure exhibits an unusual “interface‐like”…
When materials are deformed plastically via dislocations, a general finding is that samples with smaller dimensions exhibit higher strengths but with very limited amount of plasticity in tension. Here we report that one-dimensional coherent nanostructures with tilted internal twins exhibit anisotropic size effect: the…
We have employed first-principles density-functional calculations to study the electronic characteristics of covalently functionalized graphene by metal-bis-arene chemistry. It is shown that functionalization with M-bis-arene (M = Ti, V, Cr, Mn, Fe) molecules leads to an opening in the bandgap of graphene (up to 0.81…
NlpC/P60 superfamily papain-like enzymes play important roles in all kingdoms of life. Two members of this superfamily, LRAT-like and YaeF/YiiX-like families, were predicted to contain a catalytic domain that is circularly permuted such that the catalytic cysteine is located near the C-terminus, instead of at the N-te…