Materials Literature
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A new ordered fullerene phase encapsulated by large-diameter CNTs is systematically investigated by combining a growth technique by chemical vapour deposition, high-resolution transmission electron microscopy and molecular-dynamics simulations. In contrast to fullerenes in smaller (1-2 nm) diameter CNTs, where fullere…
Mesoporous silica materials derivatized with propyl-sulfonic groups (SBA-15) with a monovalent cation-exchange capacity of ∼1 meq/g were exchanged with Ce(III) ions to ∼0.5 meq/g to form Ce(III)SBA material displaying high-intensity purple photoluminescence. XPS and NIR-DRS analysis suggests the Ce(III) ion is bound t…
When irradiated by the focused Ar+ ion laser of below band-gap photon energy (2.41 and 2.54eV), a large increase of refractive index (e.g., Δn=6% at 1550nm) was observed in 60GeS2–20Ga2S3–20AgI bulk glass (with bandgap of 2.71eV). We found it surprisingly that such a large Δn quickly smeared out after the illumination…
We report measurements of the electric surface potential (SP) and its temporal evolution in thermally poled silica samples, thus, providing a direct quantitative evidence of the frozen-in voltage. The SP value is found to be directly related to the voltage across the depletion layer and there is a clear link between f…
An experiment was conducted to evaluate the effects of nitrogen (N) level on the dry matter (DM) yield, N concentration and oxalate content of some tropical grasses, namely Rhodesgrass (Chloris gayana), Guineagrass (Panicum maximum) and Sudangrass (Sorghum vulgare). Three levels of N as urea were applied (Standard-260…
The compound Ce12.60Cd58.68(2) is a metrically commensurate representative of the incommensurately modulated phase Ce13Cd57+delta. It is most likely a lock-in phase. The structure, which was solved using seeding of the modulation from those positions most affected as well as direct solution by charge flipping, represe…
We have studied the electrical transport properties of individual single-crystalline IrO(2) nanorods prepared by the metal-organic chemical vapour deposition method. With the help of the standard electron-beam lithographic technique, individual nanorods are contacted by Cr/Au submicron electrodes from above. Utilizing…
Various silver nanostructures with hollow interiors, including nanoscaled cubic or quasi-cubic boxes, tubes, triangular rings, trapeziform rings and hybrid structures composed of tubes and cubic boxes, were synthesized via an extremely simple route. The method involved the modification of the solid silver nanocrystals…
Abstract Novel cellulosic fibers modified by β ‐cyclodextrin (CFEC) were prepared for adsorption for heavy metal ions like copper (II) and organic dye like neutral red from their aqueous solutions. The modified cellulosic fibers gave higher copper ion adsorption, and showed copper ion uptake values of 6.24 mg/g at 293…
A series of sugar-appended Schiff base chiral rod−coil amphiphiles with various alkoxy chain lengths have been synthesized in order to elucidate the variation of the helical twisting power (HTP), that is, the inverse of the pitch length, of the helical texture in the self-assembly of the amphiphiles. The HTP induced b…
Zwitterionic gemini vesicles: Alkylphosphothioates and N-(2-bromoethyl)-N,N-dimethylalkylammonium surfactants react quantitatively in aqueous buffer to form zwitterionic gemini surfactants. The reaction products transform spontaneously into lipid vesicles that behave similarly to phospholipid vesicles. The zwitterioni…
Reaction of Mo(NAr)2Cl2(DME) (Ar=2,6-C6H3iPr2, DME=1,2-dimethoxyethane) with NaBH4 and PMe3 in THF formed the paramagnetic Mo(V) d1 borohydride complex Mo(NAr)2(PMe3)2(eta2-BH4) (1). Compound 1, which was characterized by EPR spectroscopy and X-ray diffraction analysis, provides a rare example both of a paramagnetic b…
Abstract Melamine (MA), as the formaldehyde (FA) absorbent of polyoxymethylene (POM), was polymerically modified by a condensation reaction with FA to form the melamine‐formaldehyde (MF) polycondensates with high molecular weight and comparatively high processing thermal stability. Ultrasonic irradiation was used for…
Abstract A series of UV‐curable intumescent flame retardant resins was obtained by blending phosphate triacrylate (TAEP) in certain ratios with star poly(urethane acrylate) (SPUA) oligomer. The flammability of the cured films was characterized by limited oxygen index (LOI), UL 94, and the cone calorimeter. The results…
Abstract 2‐Oxoadipoyl‐7‐ACA is an intermediate in the conversion of cephalosporin C (CPC) to 7‐aminocephalosporanic acid (7‐ACA) when using a new route involving D ‐amino acid oxidase, catalase and glutaryl acylase. A key point in the reaction design is to avoid the accumulation of hydrogen peroxide in the reaction me…
The mechanical properties of cellulose-based electro-active paper (EAPap) are investigated under various environmental conditions. Cellulose EAPap has been discovered as a smart material that can be used as both sensor and actuator. Its advantages include low voltage operation, light weight, low power consumption, bio…
The differential cross sections of quasi-elastic scattering at backward angles were measured with high precision for $^{32}\mathrm{S}+^{90,96}\mathrm{Zr}$ around the Coulomb barrier, and barrier distributions were extracted from the measured excitation functions. The experimental barrier distribution of $^{32}\mathrm{…
Abstract Poly( L ‐lactic acid) (PLLA) filament fibers were prepared by one‐step melt spinning process and the effects of variations in take‐up speed on their thermal properties, mechanical properties, and crystalline structures were investigated. Differential scanning calorimetry (DSC) results revealed that the PLLA f…
4 pages.-- Supporting Information Available: Details of synthesis and \ncharacterization of polymers as well as the structural SAXS results. This material is available free of charge via the Internet at http://pubs.acs.org.
Vesikelaggregate mit pH-abhängigen Membrankanälen in den Vesikelwänden (siehe Bild) wurden in zwei Stufen durch Emulgieren von Copolymeren aus Acrylsäure und dem Acrylat von 1,2-Distearoyl-rac-glycerin erhalten. Die Aggregate ahmen eukaryotische Zellen nach, die funktionelle Organellen in den Zellwänden enthalten.