Materials Literature
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We show that the emergent relativistic symmetry of electrons in graphene near its quantum critical point (QCP) implies a crucial importance of the Coulomb interaction. We derive scaling laws, valid near the QCP, that dictate the nontrivial magnetic and charge response of interacting graphene. Our analysis yields numer…
We use optical-pump terahertz-probe spectroscopy to investigate the near-threshold behavior of the photoinduced insulator-to-metal (IM) transition in vanadium dioxide thin films. Upon approaching Tc a reduction in the fluence required to drive the IM transition is observed, consistent with a softening of the insulatin…
A simple and facile sonochemical route has been demonstrated for the shape-selective preparation of highly crystalline ZnO nanostructures, such as nanorods, nanocups, nanodisks, nanoflowers, and nanospheres. The concentration of precursor chemicals, the kind of hydroxide anion-generating agents, the ultrasonication ti…
We perform atomistic and mesoscale simulations to explain the origin of experimentally observed stripelike patterns formed by immiscible ligands coadsorbed on the surfaces of gold and silver nanoparticles. We show that when the conformational entropy gained via this morphology is sufficient, microphase-separated strip…
We experimentally investigate several hydrogen storage reactions based on thermodynamic destabilization of LiBH 4 . The destabilized mixtures include nine M(H 2 )−LiBH 4 compositions, where M(H 2 ) = Al, Mg, Ti, Sc, V, Cr, MgH 2, CaH 2, or TiH 2, which were selected on the basis of favorable thermodynamics predicted b…
In this work, α-MnO 2 hollow spheres and hollow urchins are synthesized via a simple hydrothermal process without using any template or organic surfactant. The effect of the reaction time on the microstructure and morphology of samples is observed systemically. Meanwhile, the forming mechanism of hollow-structured α-M…
Interesting in generation and exploration of mid-infrared radiation has induced using optical parametric effect in nonlinear optical crystal with high nonlinearity, high transmission, phase-matching ability, and high sensitivity in room temperature, such as AgGaSe<sub>2</sub>(AGSe), AgGaS<sub>2</sub>(AGS) crystals. To…
The latest data concerning the modification of polymers containing phenylquinoxaline cycles and the manufacture of polymer materials on their basis are systematized. It has been shown that the design of silicon-and fluorine-containing and sulfated poly(phenylquinoxalines) makes it possible to significantly improve the…
Three new photochromic diarylethenes bearing cyano groups at the ortho -, meta -, or para -positions of both terminal phenyl rings, namely 1,2-bis(2-methyl-5-(2-cyanophenyl)-3-thienyl)perfluorocyclopentene ( 1a ), 1,2-bis(2-methyl-5-(3-cyanophenyl)-3-thienyl)perfluorocyclopentene ( 2a ), and 1,2-bis(2-methyl-5-(4-cyan…
Perovskite-type $\mathrm{Bi}\mathrm{Ni}{\mathrm{O}}_{3}$ is an insulating antiferromagnet in which a charge disproportionation occurs at the Bi site. La substitution for Bi suppresses the charge disproportionation and makes the system metallic, and for $0.05\ensuremath{\le}x\ensuremath{\le}0.1$ a broad metal-insulator…
Colitose is a dideoxysugar found in the O-antigen of the lipopolysaccharide that coats the outer membrane of some Gram-negative bacteria. Four enzymes are required for its production starting from D-mannose-1-phosphate and GTP. The focus of this investigation is GDP-4-keto-6-deoxy-D-mannose 3-dehydratase or ColD, whic…
Lu and Steinhardt (Reports, 23 February 2007, p. 1106) claimed the discovery of a large, potentially quasi-crystalline Islamic tiling in the Darb-i Imam shrine but regard the earlier Maragha tiling, previously described as quasiperiodic, as a small isolated motif. We demonstrate that the Darb-i Imam pattern is periodi…
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A simple method to prepare large areas of polycarbonate (PC) alignment layers with a high degree of polymer chain orientation, a periodic and oriented nanoscale pattern, and a controlled surface roughness is presented. The method involves three steps: (i) the preparation of a film of bisphenol A polycarbonate in its g…
In this paper, the introduction of both a methionine residue and a nitrobenzyl derivative as a labile linker between the peptide part and the hydrophobic alkyl chain of a peptide amphiphile are presented. These modifications are shown not to inhibit the formation of structured assemblies that analogous peptide amphiph…
A dynamic model of a solid-oxide fuel cell (SOFC) of 100 KW capacity has been developed with a control action associated with it for application in distributed power generation. The SOFC system is chosen as a distributed energy resource (DER) because of its ability to tolerate relatively impure fuels. It also can be o…
Multilayer structures of alternating thin titanium and tungsten oxide layers having dimensions of ∼20 nm have been fabricated from titanium alkoxide and various tungstate precursor solutions using the dip coating technique. Single, double, and triple layer titanate and tungstate thin films were deposited on silicon su…
Aligned nanocables, consisting of CuO nanowire cores and lipid nanotube shells, are prepared by sheathing an aligned array of CuO nanowires with a self-assembled tubular glycolipid (see figure). The sheath thickness of the nanocable is tunable by changing the incubation temperature of the lipid on the CuO nanowire.
Platinum (Pt) nanocrystals with special surfaces attract much attention in the field of chemistry because the surface structure plays a vital role for the activity and selectivity of Pt catalyst. The surface evolution of Pt nanocrystals is closely related with facet growth, which depends on not only the oxidizing prop…
Perovskites, with exclusive selectivity for oxygen over nitrogen, offer significant promise as potential high temperature adsorbents for air separation. Results from fixed bed, breakthrough experiments at 500 °C on two perovskite samples having compositions SrCo 0.5 Fe 0.5 O 3- δ and La 0.1 Sr 0.8 Ag 0.1 Co 0.5 Fe 0.5…