Materials Literature
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Biominerals are formed through an intimate association of inorganic materials and organic macromolecules. As Douglas explains in his Perspective, materials scientists increasingly use these materials as an inspiration for new synthetic materials with superior properties. Model systems can also shed light on the mechan…
A novel route was used to prepare “perfect spherical” monodispersed carbon with a smooth surface, which has a surface area of 8 m 2 /g. Air-stable iron nanoparticles with an average size of ∼10 nm were deposited on the surface of preformed carbon spherules with the aid of power ultrasound. This coating was achieved by…
Calcium caseinate (CC) and whey protein isolate (WPI) films were prepared to contain 5 or 10% Gluconal Cal (GC), a mixture of calcium lactate and gluconate, or 0.1 or 0.2% alpha-tocopheryl acetate (VE), respectively. The pH and viscosity of film-forming solutions and the water vapor permeability and tensile property o…
Abstract Gadolinium oxide films, prepared by the sol–gel process, present waveguiding properties. Their structures were studied by waveguide Raman spectroscopy (WRS) and confirmed using transmission electron microscopy (TEM). The structural evolution of the layers with annealing temperatures from 650 up to 900°C was i…
Poly(epsilon-caprolactone) was blended with various polylactide-based polymers and processed to films by the solution casting method. Blends of 25/75, 50/50, 75/25, 90/10, and 95/5 (w/w) poly(epsilon-caprolactone)/poly(l-lactide), a 95/5 (w/w) blend of poly(epsilon-caprolactone) with a poly(d-lactide), a 50/50 (w/w) p…
The structure of T(6) human insulin has been determined at 120 K at a resolution of 1.0 A and refined to a residual of 0.183. As a result of cryofreezing, the first four residues of the B chain in one of the two crystallographically independent AB monomers in the hexameric [Zn(1/3)(AB)(2)Zn(1/3)](3) complex undergo a…
In the bacterium Escherichia coli, the AraC protein positively and negatively regulates expression of the proteins required for the uptake and catabolism of the sugar L-arabinose. This essay describes how work from my laboratory on this system spanning more than thirty years has aided our understanding of positive reg…
The photophysics and reactivity of quantum size ZnO nanoparticles have been studied using static and time-resolved emission and absorption spectroscopy. Size quantization of ZnO nanoparticles is confirmed by steady-state optical absorption and emission spectroscopy. On band gap excitation, ZnO nanoparticles give both…
Abstract The mechanical performance of different wood flour/polypropylene (PP) composites with interface modifications was compared. Wood flour was incorporated into the matrix after esterification with maleic anhydride (MAN) or without any modification but with the addition of a compatibilizing agent [maleic anhydrid…
A novel technique to introduce free amino groups onto polyester scaffolds via aminolyzing the ester groups with diamine has been developed recently. Positively charged chitosan was then deposited onto the aminolyzed poly(l-lactic acid) (PLLA) membrane surface in a layer-by-layer assembly manner using poly(styrene sulf…
Abstract The audio frequency (AC) plasma of some kind of fluorocarbon chemical was applied to deposit a nanoparticulate hydrophobic film onto a cotton fabric surface. The measurement of the video contact angle showed that the superhydrophobicity of the cotton fabric was obtained with a treatment of only 30 s. The soft…
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…