Materials Literature
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Recently, there has been an increased interest in first-principles calculations of the actinides as well as in finding the new materials which display surface magnetism. We predict the existence of a magnetic moment on the uranium (001) surface by performing density functional calculations for a slab geometry in the g…
A new approach to solve quasicrystalline atomic structures in 3-dimensional (3D) real space is presented: The atomic pair distribution function (PDF) of face centred icosahedral Ho9Mg26Zn65 [a(6D) = 2x5.18(3)A was obtained from in-house X-ray diffraction data (MoKa1). Starting with rational approximant models, derived…
Large macromolecular MRI contrast agents with albumin or dendrimer cores are useful for imaging blood vessels. However, their prolonged retention is a major limitation for clinical use. Although smaller dendrimer-based MRI contrast agents are more quickly excreted by the kidneys, they are also able to visualize vascul…
Preface. Introduction. Physico-Chemical Interaction Between Magnesium and Rare-earth Metals. Decomposition of the Supersaturated Solid Solutions in Mg-RE Alloys. Peculiarities of the Plastic Deformation and Recrystallization in Mg-RE Alloys. Effect or Rare-earth Metals on Mechanical and Some Other Properties of Magnes…
Self-organized supramolecular organic nanostructures have potential applications that include molecular electronics, photonics, and precursors for nanoporous catalysts. Accordingly, understanding how self-assembly is controlled by molecular architecture will enable the design of increasingly complex structures. We rep…
Micropatterning of single crystals for technological applications is a complex, multistep process. Nature provides alternative fabrication strategies, when crystals with exquisite micro-ornamentation directly develop within preorganized frameworks. We report a bio-inspired approach to growing large micropatterned sing…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTStudy of the Dual Amorphous Phases in Semicrystalline Poly(ethylene terephthalate) Using the Heat Capacity Increment at the Glass TransitionJun Zhao, Wei Dong, Chaoxu Li, Meili Guo, and Qingrong FanView Author Information State Key Laboratory of Polymer Physics & Chemistry, Joi…
Abstract New lanthanide-quinone and semiquinone complexes with the formula [Ln(L)2(OTf)3] and [Ln(L′)2(OTf)] (Ln = La, Gd, and Yb; OTf = CF3SO3−; L = aminoquinone ligand; L′ = aminosemiquinone ligand), respectively, were synthesized, and the magnetic interaction between f-electrons and organic radicals was revealed.
Abstract A simple and easy technique is proposed for the preparation of dry hexamethylenediammonium adipate (HMA salt), using conventional dry‐blending equipment. The process includes contacting adipic acid and hexamethylenediamine, in the presence of a cryogenic medium, which is used to depress the exothermic of the…
Abstract A study was made of the effects of the initial ibuprofen load and of the specimen shape on the release of ibuprofen from poly(ε‐caprolactone‐ co ‐ D,L ‐lactide). The mol ratio of the comonomers in the copolymer was 96/4 (caprolactone to lactide) and the experiments were conducted at 37°C in vitro . The result…
Abstract Poly( n ‐butyl methacrylate) (PBMA) composites with calcium carbonate (CaCO 3 ) were prepared by in situ radical copolymerization of butyl methacrylate (BMA) and methacrylic acid (MA) with precipitated calcium carbonate. To compare the different rheological behaviors of the monomer mixtures with CaCO 3 and th…
Layer-by-layer (LbL) assemblies between poly(vinylamine hydrochloride- co - N -vinylformamide) [poly(VAm- co -NVF)] with various amounts of VAm and poly(sodium styrenesulfonate) (PSS) from their aqueous solutions were analyzed by the quartz crystal microbalance (QCM) technique, attenuated total reflection (ATR) spectr…
Abstract The use of a petaloid shape for the bottom design for carbonated PET bottles is widespread. Through this study, the causes of bottom cracking were investigated and a novel petaloid bottom was designed. The variations of the physical properties of PET according to the stretch ratio were examined and the stretc…
Reaction between the Os(VI)-nitrido complex, trans-[OsVI(tpy)(Cl)2(N)]PF6 (tpy = 2,2':6',2' '-terpyridine), and ammonia (NH3) under N2 in dry CH3CN gives the mu-1,3-azido bridged [OsII-N3-OsII]- dimer, trans,trans-NH4[(tpy)(Cl)2OsII(N3)OsII(Cl)2(tpy)]. It undergoes air oxidation to give the [OsIII-N3-OsIII]+ analogue,…
Abstract The electrochemical polymerization of azure A has been carried out using repeated potential cycling. The scan potential is set between −0.2 and 1.3 V (vs. Ag/AgCl). The electrolytic solution consisted of 5 mmol dm −3 azure A and 0.5 mol dm −3 Na 2 SO 4 with pH 6.0. The temperature for polymerization was contr…
The dynamic mechanical properties and morphology of novel ethyl acrylate ionomers, poly(ethyl acrylate- co -itaconate) [P(EA- co -ITA)], were investigated. It was found that the P(EA- co -ITA) ionomers showed a well-developed cluster loss tangent peak, which was not seen in poly(styrene- co -itaconate) ionomers. This…
A novel one-dimensional copper(II)-radical complex [Cu(NITmPy)(N3)2(CH3OH)] [NITmPy = 2-(3′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide] has been synthesized and structurally characterized. The structure consists of neutral chains of copper(II) ions alternatively bridged by double symmetric end-on and asymm…
The reaction of iron(III) (meso-tetrakis(N-methylpyridinium-4-yl)porphyrin (Fe(III)TMPyP) with nitric oxide (NO) was studied by electronic absorption spectroscopy, ESR, and electrochemical and spectroelectrochemical techniques in aqueous solutions with pH from 2.2 to 12.0. Fe(III)TMPyP has been found to undergo a redu…
PbS nanocrystals were prepared using water/C 12 E 9 /cyclohexane microemulsions as nanoreactors. The sizes and morphologies of the cubic PbS nanocrystals can be modified by controlling the concentration of ions, the volume ratio of water to surfactant and the reaction temperature. The shuttle-like nanoparticles consis…
The alkali-resistant glass fibers (ARG) are coated with special sizings to provide superior alkali resistance and are designed to reinforce cementitious and other alkali matrixes. The assessment of changes in the fiber surface nanomechanical properties is essential for understanding the fiber bulk mechanical fracture…