Materials Literature
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The straightforward solution of the crystal structure of cyclosporin (C(62)H(111)N(11)O(12).H(2)O) by a modified Shake-and-Bake procedure, using experimental neutron diffraction data alone, shows that the positivity of the density function is not a necessary prerequisite for solving the phase problem. The initial appl…
This paper gives classification results for crystallographic groups in dimensions up to 6 which refine earlier enumeration results. Based on the classification data, the asymptotic growth of the number of space-group types is discussed. The classification scheme for crystallographic groups is revisited and a new class…
Abstract Ink‐eliminated sludge flour (IESF), waste residue from the recycling treatments of waste paper, was utilized as a new kind of filler to reinforce polypropylene (PP) in this research work. Different coupling agents, including maleated anhydride grafted PP (MAPP), stearic acid (SA), and titanate (NDZ‐101), were…
Using the Lennard-Jones interaction potential between the impurity atom and carbon atom, we have studied the dependence of in-tube impurity doping on the radius of a single-wall carbon nanotube (SWNT), as well as its helicity. The obtained results show that the radius of the most stably doped SWNT is different for dif…
A method for constructing Marks' decahedral lattice for the studies of Lennard-Jones cluster structures is proposed. With the proposed method, clusters with Marks' decahedral structure are studied up to the size 10 000. By comparing the energies of these Marks' decahedral structures, the growth sequences with differen…
Abstract The effect of chemical modification of both fiber and matrix on melt rheological behavior of intimately mixed short sisal–glass hybrid fiber‐reinforced low‐density polyethylene composites was studied with an Instron capillary rheometer. The variations of melt viscosity with different shear rate and shear stre…
The macromolecular helicity induction of a novel optically inactive poly(phenyl isocyanate) bearing crown ether as a host group ( 2 ) based on host−guest complexation was discussed. 4‘-Isocyanatobenzo-18-crown-6 ( 1 ) was polymerized with MeLi in THF at −78 °C to afford 2 with 71% yield. The circular dichroism (CD) sp…
We report the femtosecond transient absorption dynamics of the gold and gold−polypyrrole nanoparticles by photoexcitation at various wavelengths. The bleach recovery dynamics of the surface plasmon band for the gold and gold−polypyrrole nanoparticles exhibit different responses to the pump beam energy and intensity in…
While the optical properties of the superconducting salt $\ensuremath{\alpha}\mathrm{\text{\ensuremath{-}}}(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\mathrm{\text{\ensuremath{-}}}\mathrm{T}\mathrm{T}\mathrm{F}{)}_{2}\mathrm{\text{\ensuremath{-}}}\mathrm{N}{\mathrm{H}}_{\mathrm{4}}\mathrm{H}\mathrm{g}(\mathrm{S}\mathrm{…
Abstract Square sheets of extrusion grade polystyrene (PS) were biaxially stretched using a laboratory biaxial stretcher. The effects of process parameters such as stretch ratio, drawing sequence, drawing speed, and temperature were studied. Birefringence, mechanical properties, and thermal shrinkage of the stretched…
We have demonstrated the feasibility of sensing adsorption of untagged molecular analytes in an electrochemically fabricated porous aluminum oxide template with regular nanometer dimension pores by monitoring reflectivity spectra. Combining this with chemistry to functionalize Al 2 O 3 with DNA oligonucleotides, we ar…
The synthesis and characterization of a polycarbonate of glycerol and poly(carbonate−ester)s of glycerol and l -lactic acid are reported. These new polymers possess a hydrolyzable backbone, tunable hydrophobic/hydrophilic properties, and functionalizable pendant groups. The free hydroxyl groups on the poly(glycerol- c…
An experimental study of the early stages of crystallization in iPP has shown a qualitative difference between the behavior at low supercooling with that observed with a deep quench. To address previous misgivings in the limits of resolution of crystallites by wide-angle scattering, a new detector has been used that h…
We report the observation of the resonant transport in multiwall carbon nanotubes in a crossed geometry. The resonant transport is manifested by an asymmetric peak in the differential conductance curve. The observed asymmetric conductance peak is well explained by the Fano resonance originating from the scattering at…
A new AB 2 monomer, designed from a template of the repeating unit of the hyperbranched polyimides by nonideal A 2 + B 3 polymerization, was successfully prepared via a multistep synthesis. Hyperbranched polyimides, having the same repeating unit as that by nonideal A 2 + B 3 polymerization, were prepared from this ne…
We present a detailed study of the magnetic properties of (Ga,Mn)N layers grown directly on 4H-SiC substrates by reactive molecular-beam epitaxy. X-ray diffraction and transmission electron microscopy demonstrates that homogeneous (Ga,Mn)N alloys of high crystal quality can be synthesized by this growth method up to a…
Mixtures of polystyrene- block -poly(methyl methacrylate) (PS−PMMA) having PMMA cylindrical microdomains with homopolymers of PMMA and poly(ethylene oxide) (PEO) were used to study the effect of the interaction between homopolymers confined to the cylindrical microdomains and the PS matrix on the microdomain spacing o…
Silver nanoparticles have been produced by γ-irradiation of silver solution in optically transparent inorganic mesoporous silica. The reduction of Ag + within the matrix is brought about by hydrated electrons and hydroalkyl radicals generated during the radiolysis of the 2-propanol solution. The particles formed withi…
The structure and properties of the {001} planar platelet in diamond are investigated using ab initio theory. We find that a carbonaceous model, based on a layer of self-interstitials, satisfies the requirements of transmission electron microscopy, infrared absorption data, and energetic considerations. The energetics…
We demonstrate movement of a head-to-head domain wall through a magnetic nanowire simply by passing an electrical current through the domain wall and without any external magnetic field applied. The effect depends on the sense and magnitude of the electrical current and allows direct propagation of domain walls throug…