Materials Literature
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Abstract In this article, nonisothermal crystallization kinetics was investigated by using differential scanning calorimeter. The Avrami, Ozawa, and combined Avrami with Ozawa (Mo method) equations were applied to describe the crystallization kinetics and estimate the kinetic parameters of mathematical models under th…
3',5'-Dimethoxybenzoin (DMB) is a bichromophoric system that has widespread application as a highly efficient photoremovable protecting group (PRPG) for the release of diverse functional groups. The photodeprotection of DMB phototriggers is remarkably clean, and is accompanied by the formation of a biologically benign…
Chirality transfer (or amplification) in soft materials is an important topic for understanding how chiral assemblies develop from the atomic level to macroscopic objects. This is an interdisciplinary area which is critically associated with the evolution from asymmetric chemistry to asymmetric physics, and, more spec…
Abstract Superfine cerium‐zinc oxides Ce 1− x Zn x O 2− x with x = 0, 0.1, 0.3, 0.5, and 1.0 were obtained by grinding Ce(SO 4 ) 2 · 2 O, ZnSO 4 ·7H 2 O and NH 4 HCO 3 under the condition of surfactant PEG‐400 being present at room temperature, washing the mixture with water to remove soluble inorganic salts, drying a…
The deformation of a cavitation bubble in shear and extensional flows is studied numerically. The Navier–Stokes equations are solved to observe the three-dimensional behaviour of the bubble as it grows and collapses. During the collapse phase of the bubble, two re-entrant jets are observed on two sides of the bubble.…
Abstract Aluminum coatings on Mg alloy AZ31 were fabricated using the thermal spraying technique, and then sealed with silane. The surface morphology and chemical groups were discerned using scanning electron microscopy and examined using Fourier transformation infrared spectroscopy, respectively. The salt fog tests a…
Abstract We report on room temperature electroluminescence from an inorganic/organic heterojunction light emitting diode based on ZnO nanowire arrays. The heterojunction is fabricated by depositing the p‐type polymer poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) on n‐type ZnO nanowires grown by e…
Naturally born nanowires: The spontaneous self-assembly of the bacterial cytoskeletal protein FtsZ was used to position metal nanoparticles in an orderly fashion to fabricate a metal nanowire (see scheme). The genetic fusion of each monomer with an appropriate short protein motif enables the specific binding not only…
The synthesis and photochromic behavior of the fast photochromic polymers carrying [2.2]paracyclophane-bridged imidazole dimer are demonstrated. A significant feature of this synthetic strategy is that we can modify the photochromic properties such as coloration/decoloration rate, coloring, and photosensitivity via th…
Abstract Baotou RE concentrate was decomposed with concentrated sulfuric acid by controlling the roasting temperature below 500°C. Thermogravimetry‐differential thermal analysis (TG‐DTA) and chemical analytical methods were used to study the thermal decomposition process and the thermal decomposition effect. The Freem…
A multi-electrode test method has been developed to assess the performance of corrosion inhibitors under sand deposits for oil and gas applications. The electrode array is mounted in a cup under a layer of sand and coupled to an external carbon steel electrode in such a way that the galvanic corrosion current at each…
Core in cage: By using a DFT-based basin-hopping method, we found putative global minima for three gold sulfide nanoclusters, observed in mass spectrometry, that all show a symmetric core-in-cage structure: a metallic Au core inside a cage with S as vertices and Au at the edges (see figure). This core-in-cage structur…
Au-Fe nanoparticles constitute one of the simplest prototypes of a multifunctional nanomaterial that can exhibit both magnetic and optical (plasmonic) properties. This solid solution, not feasible in the bulk phase diagram in thermal equilibrium, can be formed as a nanostructure by out-of-equilibrium processes. Here,…
For the development of commercially viable catalyst systems for the polymerization of propylene oxide (PO), a series of double metal cyanide (DMC) complexes have been developed by reacting aqueous zinc(II) chloride with aqueous potassium hexacyanocobaltate(III) in the presence of various complexing agents (CAs) such a…
Abstract Two groups of emulsion paints were formulated to evaluate the efficiency of emulsified heterocyclic adducts: 2‐mercaptothiazoline (2‐MT), 2‐mercaptobenzothiazole (2‐MBT), 2‐mercapto‐5‐methyl‐1,3,4‐thiadiazole (2‐MMT), and 3‐mercapto‐4‐methyl‐4H‐1,2,4‐triazole (3‐MMT). Different concentrations of 2‐MT adduct,…
meso-Triazolyl-appended Zn(II)-porphyrins were readily prepared by Cu(I)-catalyzed 1,3-dipolar cycloaddition of benzyl azide to meso-ethynylated Zn(II)-porphyrin (click chemistry). In noncoordinating CHCl(3) solvent, spontaneous assembly occurred to form tetrameric array (3)(2) from meso-meso-linked diporphyrins 3, an…
Abstract Novel flexible polyurethane foams were successfully prepared from a renewable source, hydroxytelechelic natural rubber (HTNR) having different molecular weights (1000–3400 g mol −1 ) and variation of epoxide contents (EHTNR, 0–35% epoxidation) by a one‐shot technique. The chemical and cell structures as well…
Porous organic thermosetting film with pore size smaller than 20 Å was constructed through the self-cross-linking reaction from hyperbranched polyarylate precursors with rigid tetrahedral skeleton. Using hydroquinone diacetate as the A 2 monomer and tetrakis(4-carboxyphenyl)silane as the B 4 monomer, the hyperbranched…
Abstract In this note, we calculate the electronic properties of a realistic atomistic model of amorphous graphene. The model contains odd‐membered rings, particularly five and seven membered rings and no coordination defects. We show that odd‐membered rings increase the electronic density of states at the Fermi level…
Superior toughness has been achieved in the nylon-6/PVDF blends with semicrystalline PVDF component as the dispersed particles. Morphological observations on the impact tested specimens unambiguously reveal the formation of voids and microfibrils across the fracture surface, suggesting that some extent of plastic defo…