Materials Literature
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OBJECTIVE: Because the environmental fate of manufactured nanoparticles is considered an emerging environmental concern, I used water-suspended fluorescent nanoparticles (solid latex solution) to investigate the distribution of nanoparticles in the eggs and bodies of see-through medaka (Oryzias latipes). RESULTS: Part…
Low-field magnetoresistance is ubiquitous in low-dimensional metallic systems with high resistivity and well understood as arising due to quantum interference on self-intersecting diffusive trajectories. We have found that in graphene this weak-localization magnetoresistance is strongly suppressed and, in some cases,…
A simplified approach is proposed for buckling analysis of skeletal structures, which employs a ‘rotational spring analogy’ for the formulation of the geometric stiffness matrix. The benefit of this analogy is that it offers an intuitive framework, which is based on the common notions of linear structural analysis. As…
Abstract Single‐crystal growth of 4‐hydroxy‐3‐methoxy benzaldehyde (vanillin), an excellent molecular nonlinear optical (NLO) material, from the melt using the Bridgman technique is reported for the first time. Differential thermal analysis experiments indicated that the substance melts congruently at 81 °C. A precise…
Gerollt: Die Synthese von Nanoröhren aus SrAl2O4, einem wichtigen phosphoreszierenden Wirtmaterial, wird beschrieben. Zunächst entstehen durch das Aufrollen einer künstlichen lamellaren Vorstufe in Lösung Nanoröllchen. Die Schichtgrenzflächen werden anschließend durch Tempern entfernt, was zu Einkristall-Nanoröhren fü…
Wood-Cement composites were produced from coconut (Cocos nucifera) husk, an agricultural residue with minimal economic utilization in Nigeria. Contrary to conventional practice, the boards were fabricated in the laboratory without external pressure application. The effects of calcium chloride (CaCl2) addition on the h…
An analysis is presented of the lateral solidification of a semi-infinite mushy region influenced by vertical, buoyancy-driven convection of the residual, interstitial melt. We consider a parameter regime in which the flow is steady on the time scale of the transient evolution of the mushy region. Our idealized model…
Abstract Magnetite nanoparticles modified covalently with triethoxysilane having a quaternary dicetyl ammonium ion are used together with tetraethylorthosilicate as building blocks to prepare a mesoporous material. Cetyltrimethylammonium bromide is used as a structure‐directing agent under conditions typically used fo…
Two series of binary oxide catalysts (CuGa/SA and CuSn/SA) containing CuO coupled with Ga 2 O 3 or SnO 2 were prepared by dispersing the metal phases onto a high surface area acidic silica−alumina (SA) support by an adsorption method. Similar total amounts of metals (about 1.6 atom Met ·nm - 2 ) were deposited onto th…
A spectroscopic probe of nanotube diameter: The strength of the interaction of H8Si8O12 with the inner walls of carbon nanotubes (see picture) depends on the inner diameter. This, in turn, affects the SiH stretching frequency, which can be probed by IR spectroscopy.
We study propagation of TM- and TE-polarized light in two-dimensional arrays of silver nanorods of various diameters in a gelatin background. We calculate the transmittance, reflectance and absorption of arranged and disordered nanorod arrays and compare the exact numerical results with the predictions of the Maxwell-…
Molecular dynamics simulations are used to investigate the molecular interactions of hydrogen-loaded beta-hydroquinone clathrate. It is found that, at lower temperatures, higher loadings are more stable, whereas at higher temperatures, lower loadings are more stable. Attractive forces between the guest and host molecu…
Abstract Summary: Fibers and yarns are promising forms to use and control the spatial orientation of carbon nanotubes in macroscopic materials. Various approaches have been proposed in the last few years to achieve fibers with a fraction of carbon nanotubes. Among them, coagulation spinning in aqueous media has proven…
On a roll: Nanotubes of SrAl2O4, an important phosphorescent host material, are prepared. Nanoscrolls are first formed through the roll-up of an artificial lamellar precursor in solution. The layer interfaces are then removed by high-temperature annealing, resulting in single-crystalline nanotubes.
BACKGROUND: Endothelial dysfunction is known to exaggerate coronary artery disease, sometimes leading to irreversible myocardial damage. In such cases, repetitive coronary revascularization including coronary artery bypass grafting is needed, which may cause a shortage of graft conduits. On the other hand, endothelial…
Bismuth titanate thin films were prepared by atomic layer deposition. Bismuth tris(bis(trimethylsilyl)amide) Bi(N(SiMe 3 ) 2 ) 3 was used as the bismuth and titanium methoxide Ti(OMe) 4 as the titanium precursor while water was used as the oxygen source. Self-limited growth of Bi−Ti−O films took place at a deposition…
Thermal conductivities of diamond nanorods are estimated from molecular simulations as a function of radius, length, and degree of surface functionalization. While thermal conductivity is predicted to be lower than carbon nanotubes, their thermal properties are less influenced by surface functionalization, making them…
Enzymatic ring-opening polymerization (eROP) of ε-caprolactone (ε-CL) and atom-transfer radical polymerization (ATRP) of methyl methacrylate (MMA) were integrated into a one-step chemoenzymatic route to yield poly(ε-CL- block -MMA) (PCL- b -PMMA) in supercritical carbon dioxide (scCO 2 ). The interaction between eROP…
Upon exposure to visible light, 2-pyrrolidino-substituted 3,6-dimethyl-1,4-benzoquinones photocyclize to give benzoxazolines with quantum yields of 0.07-0.10 in CH2Cl2, 0.02-0.04 in CH3CN, and <0.01 in 30% aq CH3CN. With carboxylate or phenolate leaving groups incorporated via coupling to a 5-hydroxymethyl group of th…
We have succeeded in tuning the electric conductivity of nanostructured films composed of a conducting polymer (PEDOT-PSS) and an n-type inorganic semiconductor (TiO2 nanoparticles) by light irradiation at different wavelengths.