Materials Literature
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Abstract This study investigates the influence of powder morphology and spray processes on the microstructure, crystallinity, hardness, and elastic modulus of mullite coatings. Coatings produced from mullite powders and suspensions are deposited by plasma spraying while measuring in-flight particle temperature and vel…
Abstract Photosensitive poly(amic acid ester)s (PAEs) with 2‐hydroxy‐4‐oxo‐hept‐5‐enyl side group were simply synthesized from a non‐photosensitive polyamic acid (PAA), which was prepared from cyclobutane‐1,2,3,4‐tetracarboxylic dianhydride (CBDA) and 4,4′‐diaminodiphenyl ether (DDE) in N ‐methyl‐2‐pyrrolidinone (NMP)…
In this study, a novel and facile approach for the synthesis of ternary boron carbonitride (B-C-N) nanotubes was reported. Growth occurred by heating simple starting materials of boron powder, zinc oxide powder, and ethanol absolute at 1150 degrees C under a mixture gas flow of nitrogen and hydrogen. As substrate, com…
Abstract Superfast kinetics of Nd +3 , Eu +3 , and Gd +3 ions were studied on the surfaces of N,N,N \ , N \ ‐tetramethylmalonamide (TMMA) and silsesquioxane (SSQXN‐8) resins. TMMA and SSQXN‐8 were prepared by suspension polymerization and sol–gel routes, respectively. They were identified using elemental analysis, FTI…
Colloidal spheres of atorvastatin calcium (see picture) with tunable size and enhanced dissolution rate are obtained by a solvation-driven molecular assembly method. This technique enables the large-scale synthesis of monodisperse pharmaceutical spheres, to facilitate their delivery and maximize their therapeutic effe…
The performance of a new variable modulus composite material based upon shape memory polymer (SMP) reinforced with fluidic flexible matrix composite (F2MC) tubes is investigated in this research. The new composite material is a unique combination of shape memory polymers acting as the matrix material with reinforcing…
A lanthanum(III) complex of catechin has been synthesized and characterized by elemental analysis, molar conductance, UV-Vis spectra, infrared spectra, thermal analysis, and 1H NMR. The complex behaves as a nonelectrolyte in methanol solvent. The spectral and thermal properties of the complex are examined. A thermogra…
Abstract A new method for identification of ethylene/α‐olefin copolymer was established by Fourier Transform Infared (FTIR)–Differential Scanning Calorimetery (DSC) in this article. DSC and FTIR spectroscopy techniques were used to analysis the type and content of α‐olefin in polyolefine copolymer. FTIR was available…
High strength fabrics are used to protect the Destiny module of the International Space Station from orbital debris impact damage. They are used in a stuffed Whipple shield configuration, with the fabric positioned between an outer aluminum bumper and the exterior module wall. In recent research, the authors have deve…
Ordered mesoporous silica glasses containing encapsulated magnetic nanoparticles were fabricated by the 3D replication of preorganized block copolymer templates doped with ferritin. Solutions of Pluronic F127 (PEO 105 -PPO 70 -PEO 105 ) containing horse spleen ferritin and p -toluene sulfonic acid were spin-coated ont…
A method for reducing the back scattering from bodies with complex impedance boundaries is developed. A nonlinear integral equation system providing zero backscattering is obtained for determining the impedance distribution on the boundaries of infinite cylinders. Numerical results for circular and elliptic cylinders…
The temperature dependence of the nonergodicity factor of vitreous ${\text{GeO}}_{2}$, ${f}_{q}(T)$, as deduced from elastic and quasielastic neutron scattering experiments, is analyzed. The data are collected in a wide range of temperatures from the glassy phase, up to the glass-transition temperature, and well into…
We have been developing host−guest methodology for separation of single-walled carbon nanotubes (SWNTs) with gable-type diporphyrins, designated as nanotweezers. In our previous works, chiral nanotweezers have been found to discriminate left- and right-handed structures ( M and P forms, respectively, defined in our pr…
Single-crystalline SrMn3O6−δ nanoribbons (width of 30–500 nm and lengths of up to several hundred micrometers) are synthesized by a molten-salt method. In contrast with the antiferromagnetism in bulk SrMn3O6−δ, magnetization measurements show weak ferromagnetism in these nanoribbons at low temperature. In particular,…
Extensive ab initio finite electric-field calculations are performed to study the static transverse dielectric properties of boron nitride nanotubes via the sawtooth potential approach. It is shown that the transverse polarizability is proportional to the tube radius rather than to the square of it, and that the scree…
Single-walled carbon nanotubes (SWCNTs), which were commercial grade containing 60-70 wt% impurity, were treated in a mild poly(phosphoric acid) (PPA). The purity of PPA treated SWCNTs was greatly improved with or without little damage to SWCNTs framework and stable crystalline carbon particles. An amide model compoun…
We have investigated the crystal nucleation behavior of potassium hexacyanoferrate(III) (KFC) in an isolated aqueous microdroplet surrounded by a decanol medium which is isothermally driven to supersaturation by water transport from the droplet, to examine the influence upon KFC nucleation by self-assembled surfactant…
This is an energizing time to be a biomaterials scientist and an appropriate moment to examine the state-of-the-art, current trends and future directions in biomaterials research. In nearly every area of mathematics, physics, and engineering, there is a movement toward using biology as a source of interesting question…
We show that the imaginary parts of higher-order optical nonlinearities and their decay times can be determined by a time-intensity domain analysis of the conventional transient absorption data. Using this method we have measured the values and decay times of third, fifth and seventh-order nonlinear susceptibilities o…
Abstract As one type of high‐performance fibers, the polyimide fibers can be prepared from the precursor polyamic acid via dry‐spinning technology. Unlike the dry‐spinning process of cellulose acetate fiber or polyurethane fiber, thermal cyclization reaction of the precursor in spinline with high temperature results i…