Materials Literature
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Are you a silican or a silican′t? By using a cocondensation method, well defined rhodium nanoparticles and chiral reagent (−)-cinchonidine were immobilized and stabilized on mesoporous silica nanoparticle surface simultaneously. For the enantioselective hydrogenation of ethyl pyruvate, the enantioselectivity was very…
Entubulation of transected nerves using bioabsorbable conduits is a promising alternative to sural nerve autografting, but full functional recovery is rarely achieved. Numerous studies have suggested that scaffold-based conduit fillers may promote axon regeneration, but no neuroinductive biomaterial filler has been id…
Is cluster symmetry so important? The combination of uranyl, peroxide, and pyrophosphate in aqueous solution results in the self-assembly of highly complex clusters (see figure) containing 45 uranyl bipyramids and 23 pyrophosphate groups. These clusters are built from three basic structural units, and are highly unusu…
The catalytic activity of Pt nanoparticles (PtNPs) with different sizes and shapes was investigated in a photocatalytic hydrogen-evolution system composed of the 9-mesityl-10-methylacridinium ion (Acr(+)-Mes: photocatalyst) and dihydronicotinamide adenine dinucleotide (NADH: electron donor), based on rates of hydrogen…
라디오파 반응성 마그네트론 스퍼터링 방법으로 성장된 ITO박막의 열처리에 따른 표면구조, 결정, 전기 및 광학적 특성을 조사하였다. 저온에서 증착한 시료를 챔버에서 $50^{\circ}C$ , $100^{\circ}C$ , $150^{\circ}C$ , $200^{\circ}C$ , $250^{\circ}C$ 로 2시간 동안 열처리하였다. 열처리에 따른 박막의 결정구조, 전기 및 광학적 특성은 X-선회절 장치, 전자주사현미경, 원자현미경, 저항 측정기를 사용하여 조사하였다. 열처리 온도 $150^{\circ}C$ 에서 450~900 nm 파장의 평균 투과율이 87%…
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Nimm zwei: Das im Titel bezeichnete Porphyrinoid kann zwei verschiedene Metallionen in unterschiedlichen Oxidationsstufen koordinieren (siehe Bild). Eine Röntgenstrukturanalyse bestätigt die Rechteck-Konformation für sowohl ein- als auch zweikernige Komplexe.
In this paper we present a mathematical model to describe the phenomenon of phase separation, which is modelled as space regions where an order parameter changes smoothly. The model proposed, including thermal and mixing effects, is deduced for an incompressible fluid, so the resulting differential system couples a ge…
Mix and match: The title porphyrinoid has been synthesized and shows unique coordination chemistry by incorporating two different metals with different oxidation states (see figure). X-ray crystallography was used to confirm that a rectangular conformation in both mono- and binuclear complexes was retained.
The last decade has seen major progresses in studies of elementary mechanisms of deformation in amorphous materials. Here, we start with a review of physically-based theories of plasticity, going back to the identification of "shear-transformations" as early as the 70's. We show how constructive criticism of the theor…
The electromagnetic transition properties of the decuplet to octet baryon ($Δ\rightarrow Nγ$) is studied within the frame work of a hypercentral quark model. The confinement potential is assumed as hypercentral coloumb plus linear potential. The transition magnetic moment and transition amplitude $f_{M_1}$ for the $Δ\…
The pseudogap state is widely regarded as a precursor to high-temperature superconductivity yet remains poorly understood. Using high field (30 T) NMR, we report two electronically distinct oxygen sites within the copper-oxygen (Cu-O) planes of an underdoped cuprate in the pseudogap state. At temperatures well above t…
While diverse fracture characteristics have been observed in liquid metal embrittlement (LME) depending on the solid-liquid metal pairs, the penetration of nanometer-thick liquid metal films along the grain boundary has been identified as one of the key mechanisms for embrittlement in many classical LME systems, such…
We derive simple sets of equations to describe the microwave response of a thin film of magnetized hydrogen plasma in the presence of carbon nanotubes, which were grown by ironcatalyzed high-pressure disproportionation (HiPco). By considering the interference effects due to multiple reflections between thin plasma fil…
Storm beach buffer, being different from the coastal set back currently in place in many countries in the world, is the provision of a sufficient beach width to safe guard against the onslaught of a fierce storm. The extent of this requirement is tentatively assessed using the SBEACH module in the CEDAS package. The i…
We have demonstrated a high power red fiber laser with a Pr-doped waterproof fluoro-aluminate glass fiber (Pr:WPFGF). When 800 mW pumping power of a blue/violet GaN laser diode (GaN-LD) was launched into the Pr:WPFGF (core diameter 8 μm, length 40 mm) with dielectric coating on both end surfaces to construct a resonat…
There are three methods for analyzing flow and pressure distribution in looped water supply networks (the loop method, the node method, the element method) taking into consideration hydraulic parameters chosen as unknown. For all these methods, the nonlinear system of equations can be solved by iterative procedures (H…
The pseudogap state is widely regarded as a precursor to high-temperature superconductivity yet remains poorly understood. Using high field (30 T) NMR, we report two electronically distinct oxygen sites within the copper-oxygen (Cu-O) planes of an underdoped cuprate in the pseudogap state. At temperatures well above t…
The main goal of these notes is to give a review of the equations for two phase flow problems with an interface between the two phases in a self-contained way, and, in particular, to properly include surface tension into the interface balance equations.
We investigate the quantum Hall effect in graphene. We argue that in graphene in presence of an external magnetic field there is dynamical generation of mass by a rearrangement of the Dirac sea. We show that the mechanism breaks the lattice valley degeneracy only for the $n=0$ Landau levels and leads to the new observ…