Materials Literature
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We describe a novel type of electromagnetic cloak designed to conceal an object in a corner, and demonstrate its excellent performance by employing direct numerical simulation. Furthermore, we study the angular dependence and the effect of loss on the invisibility performance and compare ideal and simplified cloaks. T…
Abstract In this study, compatibilizing ability of silicone carbide modified multiwalled carbon nanotube (MWCNT) and polyphosphazene for the incompatible polyetherimide/liquid crystalline polymer (LCP) blend was investigated in detail. From rheological study, it was evident that the viscosities of binary and ternary b…
Abstract The degree of silane grafting and cross‐linking of several high‐density polyethylenes (HDPE) was studied. The results are compared with those of a low‐density polyethylene (LDPE) and a linear low‐density polyethylene (LLDPE). Molecular characterization was done by gel permeation chromatography. The difference…
We apply electronic structure methods based on hybrid-exchange DFT functionals under periodic boundary conditions to study the catalytic aerobic oxidation of hydrocarbons in Mn-doped aluminophosphates. In particular, we focus on the mechanism of the propagation reactions. Hydrocarbon oxidation is achieved via a succes…
Electronic structure methods based on periodic DFT with hybrid-exchange functionals are applied to study the reaction mechanism of the aerobic oxidation of hydrocarbons catalyzed by Mn-doped nanoporous aluminophosphates. Here, we focus on the regeneration of the active sites that closes the oxidation cycle. At this st…
Two-photon excitation profiles and fluorescence spectra have been measured as a function of pressure in a diamond anvil cell up to 15.5 GPa in crystal phases I and II and in the glassy form of pyridine. The fluorescence emission intensity increases by about 6 orders of magnitude in going from the liquid to the crystal…
Abstract A series of copolymers containing ε‐caprolactone (CL) and 4‐methyl‐ε‐caprolactone (MeCL) were synthesized by ring‐opening polymerization (ROP) using Tin(II) bis(2‐ethylhexanoate)(Sn(Oct) 2 ) or Novozym 435 as catalyst. The molecular structure and weight of copolymers were determined by nuclear magnetic resona…
Ionic liquids that dissolve cellulose provide an option to pretreat lignocellulosic biomass. In this study, potential application of three ionic liquids in pretreating rice husk and their abilities in dissolving rice husk cellulose were investigated. The ionic liquids applied were 1-butyl-3-methylimidazolium chloride…
Abstract This article presents foaming behaviors and cellular structures of poly(lactic acid) (PLA)‐clay nanocomposite and respective neat PLA foams using CO 2 as a foaming agent. The effects of nanoclay and foaming conditions on the foam morphology and mechanical properties of neat (PLA) and PLA‐clay nanocomposites h…
We report the results of first-principles molecular dynamics simulations for liquid and undercooled eutectic Au${}_{72}$Ge${}_{28}$ alloys at various temperatures. In comparison with the parent Au${}_{81}$Si${}_{19}$ liquid, we find a much less pronounced chemical short-range order in Au${}_{72}$Ge${}_{28}$, mainly du…
We carried out the accurate in situ Hall-effect measurements, the temperature dependence of electrical resistivity measurements and the first-principles calculations in SnO under high pressure. The results of Hall-effect measurements display the carrier transport behavior of SnO under pressure, which indicates that Sn…
Photoinduced anisotropy in nano-dimensional (ND) thin films (<50nm thick) of chalcogenide glasses is observed for the first time. Results of photoinduced dichroism and photodarkening effect in 10, 20, 50 and 100 nm glassy As2S3 films are presented and compared with photoinduced phenomena in thick films (>1µm). ND As2S…
We studied the characteristics of a circular metallic grating illuminated by broadband radial and azimuthal polarizations. We demonstrated that this scenario is the cylindrical analogue of a one-dimensional Cartesian grating illuminated by TM and TE polarizations. We measured the transmission spectra of this structure…
Graphene has been considered as a candidate for interconnect metal due to its high carrier mobility and current drivability. In this letter, the breakdown mechanism of single-layer chemical-vapor-deposited (CVD) graphene and triple-layer CVD graphene has been investigated at three different conditions (air exposed, va…
We report on high resolution subsurface and material specific differentiation of silica, Au and silica-capped Au nanoparticles using scattering-type scanning near-field optical microscopy (s-SNOM) in the visible (λ=633 nm) and mid-infrared (λ=10.7 μm) frequencies. Strong optical contrast is observed in the visible wav…
The first oxygen permeation data for a dense hollow-fiber membrane based on a K 2 NiF 4 -type oxide are reported. The U-shaped (Pr 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Ga 0.05 )O 4+δ (PLNCG) hollow-fiber membranes were prepared by a phase-inversion spinning process. The dependences of the oxygen permeation on the feed air…
Abstract In our recent work, we have explored the formation of chemotherapeutic delivery vehicles constructed from four different amphiphilic linear‐dendritic hybrid block copolymers. These micelles were found to form about 100‐nm‐sized structures that were capable of sequestering doxorubicin at loading efficiencies u…
Measurements of fundamental magnetic properties including not only dc and ac susceptibilities but also magnetic aging effects have been performed for aluminoborate glasses with high concentrations of iron and rare-earth ${R}^{3+}$ ions ($\mathit{\text{R}}=\mathrm{Sm}$, Gd, and Tb) in order to give an insight into the…
Characterizing interfacial reactions is a crucial part of understanding the behavior of nanoparticles in nature and for unlocking their functional potential. Here, an advanced nanostructure characterization approach to study the corrosion processes of silver nanoparticles (Ag-Nps), currently the most highly produced n…
Abstract Bacterial cellulose (BC) fiber reinforced unsaturated polyester (UPE) composites were fabricated using the resin transfer molding method. The mechanical properties, moisture absorption behavior, and photodegradation of the composites were studied. Scanning electron microscopy observations indicated that BC na…