Materials Literature
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A long-standing controversy exists between molecular dynamics simulations and experiments on the twinning propensity of nanocrystalline (NC) face-centered-cubic metals. For example, three-dimensional molecular dynamics simulations rarely observed twins in NC Ni, whereas experiments readily observed them. Here this dis…
In vivo degradation of magnesium alloy implant, the bone response to the magnesium, and the effect of the degradation of magnesium on the blood composition and organs were investigated by using light microscopy and scanning electronic microscopy with energy dispersive spectrum. Magnesium alloy showed different degrada…
Graphene-derived nanomaterials are emerging as ideal candidates for postsilicon electronics. Elucidating the electronic interaction between an insulating substrate and few-layer graphene (FLG) films is crucial for device applications. Here, we report electrostatic force microscopy (EFM) measurements revealing that the…
Single crystals of ${\text{BaFe}}_{2}{\text{As}}_{2}$ and ${\text{Ba}}_{0.55}{\text{K}}_{0.45}{\text{Fe}}_{2}{\text{As}}_{2}$ have been grown out of excess Sn with 1% or less incorporation of solvent. The crystals are exceptionally micaceous, are easily exfoliated, and can have dimensions as large as $3\ifmmode\times\…
Reversible mechanochromic luminescence of [(C6F5Au)2(mu-1,4-diisocyanobenzene)] is reported. Grinding of the complex induced a photoluminescent color change, which was restored by exposure to a solvent. This cycle was repeated 20 times with no color degradation in the emissions. Their optical properties, X-ray crystal…
Making devices with graphene necessarily involves making contacts with metals. We use density functional theory to study how graphene is doped by adsorption on metal substrates and find that weak bonding on Al, Ag, Cu, Au, and Pt, while preserving its unique electronic structure, can still shift the Fermi level with r…
Results about electrochemical anodic passivation of indium phosphide formed sequentially in two electrolytes with contrasted properties are reported for the first time. Using a galvanostatic method, oxidation of the InP surface has been formed initially at pH 9 with a current density of 0.2 mA cm −2 , while the anodiz…
Abstract BACKGROUND: Polyacrylonitrile (PAN) artificial muscles have attracted considerable attention for their fast responses. This research work is based on the preparation of novel pH‐sensitive hydrogel fibers derived from hydrolyzed PAN and gelatin by wet spinning and chemical modification. RESULTS: Through charac…
A simple technique for the fabrication of optically active porous silicon (PSi) in the dark on n-type substrates is presented. This solves the long-standing problem that n-type photoluminsecnt porous silicon can only form under illumination. Strong visible red photoluminescence is demonstrated.
Polymerization of L -lactide within the pores of anorganic mammalian bone is described. No additional solvent or catalyst is used. The resulting composites exhibit macroscopic morphologies and mechanical properties similar to that of the original bone. We observe an average compressive strength of 194 MPa and an elast…
Hybrid scaffolds for tissue engineering are becoming increasingly complex through incorporation of biologically active biomacromolecules. There is a need to develop a compatible sterilization method that is capable of killing microorganisms, without adversely affecting the labile scaffold biomaterials or biomacromolec…
Molecular interactions between templating porogen particles and the underlying substrate can be exploited to create a controlled release mechanism while maintaining the bulk properties of the matrix material. Furthermore, these interactions can be reversed by priming the substrate with a hydrophobic layer to produce a…
Abstract A topological approach to the analysis of isomeric dendrimers by considering their molecular graphs has been applied to correlate various properties of a series of new sulfonimide‐based isomeric dendrimers with their structures. According to this approach isomeric dendrimers are referred to as either isograph…
Abstract In the previous paper (Zahedi et al., 1 J Appl Polym Sci, to appear) the optimal conditions of a new modeling procedure for correlating a scalar response to an input spectrum were established. In this article the developed model is applied to correlate the stress–strain behavior of several commercial high den…
Abstract Single crystals of barium oxalate monohydrate (BaC 2 O 4 .H 2 O, BOM) were grown in pure form by controlled diffusion of Ba 2+ using the gel technique at different temperatures. Starting from aqueous Ba 2+ chloride (BaCl 2 ) and acetic acid (C 2 H 2 O 4 ) in gel, this method offers a low‐cost and an easiest a…
Abstract High impact polystyrene (HIPS)/magnesium hydroxide (MH) composites were prepared by melt‐blending. Two kinds of interfacial modifiers were used in this research, maleinated poly[styrene‐ b ‐(ethylene‐ co ‐butylene)‐ b ‐styrene] (SEBS‐ g ‐MA) triblock copolymer and PS. The effects of the use levels of SEBS‐ g…
The ionization of noble gas atoms with keV energies scattered under grazing angles of incidence of about $2\ifmmode^\circ\else\textdegree\fi{}$ from atomically clean and flat metal surfaces is assigned to a two-electron Auger ionization process. Auger ionization, the inverse process of Auger neutralization, is a dynam…
Roll's auf! Die Selbstorganisation von para-Terphenylen-1,4′′-ylenbis(dodecanamid) in THF liefert je nach den Reaktionsbedingungen entweder mehrwandige aufgerollte organische Nanoröhren mit offenen Enden oder planare Schichtsysteme (siehe Bild). Die Nanoröhren können Fullerenmoleküle einschließen, was zu kabelartigen…
Polyvinyl alcohol hydrosulfate (PVA-S) was obtained by esterification reaction of polyvinyl alcohol using sulfuric acid. Nanoscale graphite (NanoG) resulting from exfoliation of expandable graphite and subsequent sonication irradiation of resulting expanded graphite shows nanoscale structure with a thickness of 40—70…
Abstract Composite sheets of polyethylene and polypyrrole‐coated wollastonite were prepared by extrusion and compression molding. Four compatibilizers were also evaluated, poly(ethylene‐ co ‐methyl acrylate) (EMA), maleated polyethylene (MAPE), poly(ethylene‐ co ‐vinyl alcohol) (EVOH), and poly(vinyl alcohol) (PVOH).…