Materials Literature
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Phospholipids comprise an enormous range of chemical structures that provide much of the functionality associated with cellular membranes. We have developed a simple method for incorporating phospholipids onto the surfaces of anisotropic gold nanorods as a stepping-stone for creating responsive and multifunctional nan…
We report on the facile preparation of highly scattering metal-coated polystyrene (PS) latex beads by using solvent-controlled heterocoagulation. Starting with an aqueous dispersion of PS beads and poly(vinyl pyrrolidone)-capped metal nanoparticles (NPs), homogeneous and dense metal coatings were obtained by the contr…
We use a new approach to derive dielectric mixing rules for macroscopically homogeneous and isotropic multicomponent mixtures of anisotropic inhomogeneous dielectric particles. Two factors of anisotropy are taken into account, the shape of the particles and anisotropy of the dielectric parameters of the particles' sub…
Two new polar noncentrosymmetric oxides, RbSe 2 V 3 O 12 and TlSe 2 V 3 O 12, have been synthesized and characterized. The oxides are isostructural, as Tl + exhibits an inert rather than a stereoactive lone pair. The reported materials were structurally characterized by single-crystal X-ray diffraction. The materials…
We have investigated the behavior of the resistance of graphene at the $n=0$ Landau level in an intense magnetic field $H$. Employing a low-dissipation technique (with power $P<3\text{ }\text{fW}$), we find that at low temperature $T$, the resistance at the Dirac point ${R}_{0}(H)$ undergoes a 1000-fold increase fr…
Superhydrophobic and self-cleaning cellulose surfaces have been obtained via surface-confined grafting of glycidyl methacrylate using atom transfer radical polymerization combined with postmodification reactions. Both linear and branched graft-on-graft architectures were used for the postmodification reactions to obta…
We analyze recent measurements [R. Blinc, V. V. Laguta, B. Zalar, M. Itoh and H. Krakauer, J. Phys. : Cond. Mat., v.20, 085204 (2008)] of the electric field gradient on the oxygen site in the perovskites SrTiO3 and BaTiO3, which revealed, in agreement with calculations, a large difference in the EFG for these two comp…
We present a microscopic picture of silver dynamics in ${\text{GeSe}}_{3}:\text{Ag}$ glass obtained from the ab initio simulation. The dynamics of Ag is explored at two temperatures: 300 and 700 K. In the relaxed network, Ag occupies trapping centers that exist between suitably separated host sites. At 700 K, Ag motio…
We report the synthesis and characterization of three new poly(2,7-carbazole) derivatives, namely, poly[ N -9-heptadecanyl-2,7-carbazole- alt -5,7-di(3-octylthien-2-yl)-2,3-di(thien-3-yl)-thieno[3,4-b]pyrazine (P1), poly[ N -9-heptadecanyl-2,7-carbazole- alt -5,7-di(3-octylthien-2-yl)-2,3-di(phen-1-yl)-thieno[3,4-b]py…
The phase-change memory (PCM) relies on the electrical properties of the chalcogenide materials to represent the stored bit of information. As a result, data stability depends on structural relaxation (SR) in the amorphous chalcogenide phase, which results in a temperature-accelerated time evolution of the electrical…
The solidification process during squeeze casting is analyzed based on the classical solidification and plastic deformation theory. The linear relationship between punch velocity and the solidification rate is established if the density change of molten meals is neglected. To obtain defect-free castings, the punch vel…
We demonstrate the Au-assisted growth of semiconductor nanowires on different engineered substrates. Two relevant cases are investigated: GaAs/AlGaAs heterostructures capped by a $50 {\rm nm}$-thick InAs layer grown by molecular beam epitaxy and a $2 {\rm μm}$-thick InAs buffer layer on Si(111) obtained by vapor phase…
The results of the ab initio FLAPW-GGA calculations of the band structure of the newly synthesized tetragonal (space group P4/nmm) layered iron phosphide-oxide: 17K superconductor Sr4Sc2Fe2P2O6 are presented. For Sr4Sc2Fe2P2O6 the optimized structural data, the energy bands, total and partial densities of states, Ferm…
The atomic structure and elastic properties of silicon carbide nanowires of different shapes and effective sizes were studied using density functional theory and classical molecular dynamics. The surface relaxation led to surface reconstruction with splitting of the wire geometry to hexagonal (surface) and cubic (bulk…
We present a planar design of a metamaterial exhibiting electromagnetically induced transparency that is amenable to experimental verification in the microwave frequency band. The design is based on the coupling of a split-ring resonator with a cut-wire in the same plane. We investigate the sensitivity of the paramete…
Bi- and monometallic nanoparticles of Au and Pd with a rather narrow size distribution were deposited on polyaniline (PANI) and their structural properties as well as catalytic behavior in the aerobic oxidation of benzyl alcohol were investigated. The size of the mono- and bimetallic particles was controlled in a narr…
This brief review presents a comprehensive outline of the present research status on the fast moving carbon nanotube (CNT) field. It covers a short introduction to the relation between carbon nanotubes, graphite, and other forms of carbon and explains in detail the structure of CNTs. The electronic, electrical, and me…
The new nitridoalumosilicate phosphor SrAlSi 4 N 7:Eu 2+ has been synthesized under nitrogen atmosphere at temperatures up to 1630 °C in a radio-frequency furnace starting from Sr metal, α-Si 3 N 4, AlN, and additional Eu metal. The crystal structure of the host compound SrAlSi 4 N 7 has been solved and refined on the…
Cationic contact-killing is an important strategy for creating antimicrobial surfaces that prevent viable bacteria attachment. Recent studies have shown that highly swollen, compliant surfaces resist bacterial attachment and a sufficient density of mobile cationic charge can effectively disrupt bacterial cell membrane…
Electrochemical capacity retention of nearly X-ray amorphous nanostructured manganese oxide (nanoMnO 2 ) synthesized by mixing directly KMnO 4 with ethylene glycol under ambient conditions for supercapacitor studies is enhanced significantly. Although X-ray diffraction (XRD) pattern of nanoMnO 2 shows poor crystallini…