Materials Literature
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We prepared a series of W-based granular metals by means of electron beam induced deposition from the carbonyl percursor W(CO) 6 . For samples with W-contents of 31.8(±1.4), 34.0(±1.7) and 36.9(±1.8) at%, we observed a modified power law dependence σ=σ 0 + bT β of the electrical conductivity with β=0.47–0.58, which we…
AIMS: The aims of this study were to optimize condensed corn solubles (CCS) as a medium for growth of Ralstonia eutropha and to determine the effects of individual volatile fatty acids (VFAs) on polyhydroxyalkanoate (PHA) production. METHODS AND RESULTS: A CCS medium of concentration 240 g l(-1) with a carbon : nitrog…
In this letter, we present a very convenient and efficient technique of direct replication of biological structures via a two-step phase-separation micromolding process (PSmicroM). Our study has demonstrated that PSmicroM can be used to replicate the surface structure of a lotus leaf. On one hand, the micro/nanostruct…
Abstract A new triphenylamine‐containing aromatic diamine monomer, N,N ‐bis(4‐aminophenyl)‐ N ′ ,N ′‐bis(4‐ tert ‐butylphenyl)‐1,4‐phenylenediamine, was synthesized by an established synthetic procedure from readily available reagents. A novel family of electroactive polyamides with di‐ tert ‐butyl‐substituted N,N,N ′…
Magneto-optical imaging was used to study the local magnetization in polycrystalline NdFeAsO 0.9 F 0.1 (NFAOF). Individual crystallites up to ∼200 × 100 × 30 μm 3 in size could be mapped at various temperatures. The in-grain, persistent current density is about j ∼10 5 A cm −2 and the magnetic relaxation rate in a rem…
Polyelectrolyte multilayer coatings have emerged as substrates to control cellular behavior, but interactions with human multipotent mesenchymal stromal cells (MSCs) have not been studied. We looked at layer-by-layer coatings of cationic poly-L-lysine (PLL) and anionic hyaluronic acid (HA) as substrates for MSCs of pl…
Highly crystalline SnO(2) nanocrystals with and without Zn(2+) doping were directly prepared by a solvothermal method. By systematic characterizations using x-ray diffraction, transmission electron microscopy, infrared spectra, and UV-vis spectra, it is demonstrated that all samples crystallized in a single phase of r…
Abstract Hydrotalcite‐like Mg‐Al‐NO 3 ‐layered double hydroxide (LDH) was successfully prepared in a mortar by manually grinding the hydrated magnesium and aluminum nitrate salts with sodium hydroxide. Various techniques, including XRD, MAS NMR, FTIR, SEM; thermogravimetric and differential thermal analyses (TGA,DTA),…
We report on the synthesis of Fe-doped ZnO with nominal composition of Zn0.99Fe0.01O by using a coprecipitation method. X-ray diffraction and selective area electron diffraction studies reveal a single phase wurtzite crystal structure without any secondary phase. Field emission transmission electron microscopy measure…
We demonstrate that the low-frequency resistance fluctuations, or noise, in bilayer graphene are strongly connected to its band structure and display a minimum when the gap between the conduction and valence band is zero. Using double-gated bilayer graphene devices we have tuned the zero gap and charge neutrality poin…
Novel three-dimensional (3D) dendritic CdS nanoarchitectures were synthesized via a facile template-free hydrothermal process only using CdSO 4 and thiourea as precursors and cetylpyridinium chloride (CPC) as a capping reagent. The morphology of CdS nanoarchitecture is strongly dependent on the reaction conditions suc…
Carbon nanotubes (CNTs) emerged as an attractive material for nonlinear optical devices. Their quasi-one-dimensional structure provided their unique nonlinear characteristics. However, one of their drawbacks is the handling method. We have proposed and demonstrated optical manipulation of CNTs to deposit them onto cor…
Abstract The effect of the orientation of carbon fillers with different aspect ratios on the resistivity and morphology of conductive polymer composites (CPCs) based on polypropylene was investigated in this study. Multiwall carbon nanotubes (MWNTs) and carbon black (CB) were used as conductive fillers. The CPCs were…
The decomposition route of N-substituted calcium amidoborane complexes depends on the steric bulk of the substituent. Relatively small substituents (R = H, Me, iPr) gave dehydrogenation to dimeric complexes with a bridging RN-BH-N(R)-BH(3)(2-) ion, whereas the larger 2,6-di-isopropylphenyl substituent resulted in form…
Helical superstructures: A series of luminescent chiral alkynylplatinum(II)-terpyridyl complexes has been successfully synthesised and shown to be capable of forming metallogels that show helical fibrous nanostructures. The chiral supramolecular structure and the spectroscopic properties are found to depend on the ext…
Abstract Poly(ε‐caprolactone) (PCL) with a pendent coumarin group was prepared by solution polycondensation from 7‐(3,5‐dicarboxyphenyl) carbonylmethoxycoumarin dichloride and α, ω‐dihydroxy terminated poly(ε‐caprolactone) with molecular weights of 1250, 3000, and 10,000 g/mol. These photosensitive polymers underwent…
We report neutron diffuse scattering measurements on highly magnetostrictive Fe1-xGax alloys (0.14<x<0.20) with different thermal treatments. This diffuse scattering scales with magnetostriction and exhibits asymmetric peaks at the (100) and (300) reciprocal lattice positions that are consistent with the coexistence o…
Abstract Four metal benzylalkoxides, [L 2 M 2 (μ‐OBn) 2 ] (M = Mg or Zn), based on NNO‐tridentate ketiminate ligands are synthesized and characterized. X‐ray crystal structural studies of [(L 1 ) 2 Mg 2 (μ‐OBn) 2 ] ( 1a ) and [(L 1 ) 2 Zn 2 (μ‐OBn) 2 ] ( 1b ) (L 1 ‐H = (Z)‐4‐((2‐(dimethylamino)ethylamino)(phenyl)methy…
ZnO nanowire (NWs) arrays coated with CdS quantum dots (QDs) were successfully fabricated with a chemical bath deposition process. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction (XRD) have been utilized to characterize the samples. We have studied the processes of sepa…
Combining density-functional theory calculations with many-body Green's-function technique, we reveal that the macroscopic magnetization in half-metallic antiferromagnets does not vanish at finite temperature as for the $T=0$ limit. This anomalous behavior stems from the inequivalent magnetic sublattices which lead to…