Materials Literature
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We have investigated the model light harvesting systems (LHSs) A and B typifying energy transfer (ET) between a naphthalene, Np (donor, D), and an azobenzene, Az (acceptor, A), shown schematically in Scheme 2 . These models were actualized as the naphthyl azo molecules 1 and 4 containing a methylene tether (Scheme 1).…
As the primary candidate of ITER Test Blanket Module (TBM) to be tested under the leadership of Japan, a water cooled solid breeder (WCSB) TBM is being developed. This paper shows the recent achievements towards the milestones of ITER TBMs prior to the installation, which consist of design integration in ITER, module…
The average structure of double-walled carbon nanotube (DWCNT) samples can be determined by x-ray diffraction (XRD). We present a formalism that allows XRD patterns of DWCNTs to be simulated and we give researchers the tools needed to perform these calculations themselves. Simulations of XRD patterns within this forma…
We report a first-principles study of the structural, electronic, and dynamical properties of high-density amorphous (HDA) silicon, which was found to be formed by pressurizing low-density amorphous (LDA) silicon (a normal amorphous Si) [T. Morishita, Phys. Rev. Lett. 93, 055503 (2004); P. F. McMillan, M. Wilson, D. D…
Abstract Novel fluorinated polyurethanes (FPUs) were prepared by living radical polymerization of polyurethanes and hexafluorobutyl acrylate. The structures of the FPUs were characterized by FTIR, 1 H NMR, GPC, DSC, and XPS. The fluorinated polyurethane polymerization was investigated and showed monomer conversion, an…
Abstract The differences that direct melt compounding and masterbatch dilution cause in the properties of melt compounded polypropylene (PP) and high density polyethylene‐based (PE‐HD) nanocomposites are presented. The results include comparison of properties and morphology of directly melt processed organoclay nanoco…
Tungsten local transport in the diverter region emitted from the outer divertor was studied in JT-60U. Tungsten-coated CFC tiles were installed in the outer divertor position, on which outer strike points did not normally sit. A neutron activation method to measure tungsten surface density was used for the first time.…
In this work, we present a facile and reproducible method to obtain thermally responsive, monodisperse, fluorescent microgels with diameters smaller than 700 nm based on poly(N-isopropyl acrylamide) (PNIPAM) interpenetrated with poly(thiophene-ethyl buthyl sulfonate) (PTEBS). Changing the temperature and inducing the…
In this paper we study the effect of a fluctuating gap in mono- and bilayer graphene, created by a symmetry-breaking random potential. We identify a continuous symmetry for the two-particle Green's function which is spontaneously broken in the average two-particle Green's function and leads to a massless fermion mode.…
First-principles calculations were performed to study the mechanical properties of typical precipitates of creep resistant magnesium alloys (Mg2Si, Mg2Ge, Mg2Sn and Mg3Zn3Y2). Formation enthalpies and cohesive energies, elastic constants C11, C12, C44, bulk modulus B0, Young's modulus E, shear modulus G, the ratios of…
Zn 1− x V x O films ( x = 0, 1.3, 1.9, 2.6, 3.5, 4.3 and 6.2 at%) were prepared on glass substrates via the direct current reactive magnetron co-sputtering method. The microstructure, band gap, photoluminescence and Raman scattering of these films have been systematically investigated. The structural and chemical stat…
(13) C solid-state exchange NMR is applied to study the influence of morphology on chain diffusion between crystalline and noncrystalline regions in ultrahigh molecular weight linear polyethylene (PE). Lamellar-doubling reduces the exchange rate by a factor of two indicating that the chain diffusion coefficient is lar…
The distance of closest approach of particles with hard cores is a key parameter in statistical theories and computer simulations of liquid crystals and colloidal systems. In this Brief Report, we provide an algorithm to calculate the distance of closest approach of two ellipsoids of arbitrary shape and orientation. T…
Using nonequilibrium molecular-dynamics simulations, we study the temperature dependence of the negative differential thermal resistance that appears in two-segment Frenkel-Kontorova lattices. We apply the theoretical method based on Landauer equation to obtain the relationship between the heat current and the tempera…
Adhesives composed of synthetic and low-cost molecules that are based on simple chemical principles are attractive because of their versatility. In this article, we report adhesion between two planar substrates coated with layer-by-layer (LbL) assembled films of cationic poly(diallyldimethylammonium chloride) (PDDA) a…
ZnO nanorods and nanoparticle electrodes have been applied to solar cells possessing characteristics of bulk heterojunction and dye-sensitized devices. First, the ZnO electrodes were covered with fullerene acid molecules to yield the monolayer on the electrodes. Then, zinc porphyrin and fullerene acid molecules were s…
Vanadium oxides based materials are well known to play an active role as catalysts in many chemical processes of technological importance like for example hydrocarbon oxidation reactions or selective catalytic reduction of NO x in the presence of ammonia. Usually the (010) surface is pointed out as the most important,…
We consider the two-dimensional Hubbard model on the honeycomb lattice, as a model for single-layer graphene with screened Coulomb interactions; at half filling and weak coupling, we construct its ground-state correlations by a convergent multiscale expansion, rigorously excluding the presence of magnetic or supercond…
We have found that the electromechanical resonance frequency of Terfenol-D/Pb(Zr x Ti 1− x )O 3 laminated composites can be tuned by an applied dc magnetic ( H dc ) bias. With increasing H dc from 0 to 5000 Oe, the resonance frequency ( f r ) can be shifted over the range of 40 ⩽ f r ⩽ 55 kHz. This finding offers a me…
We show that an experimentally attainable magnetic field applied along the axis of a metallic carbon nanotube not only opens the gap in the nanotube energy spectrum but also allows optical transitions, which are forbidden in the absence of the field. Possible terahertz applications of this effect are discussed.