Materials Literature
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Abstract Different crystallization kinetic models (Avrami and Tobin) have been applied to study the crystallization kinetics of virgin poly(butylene terephthalate) (PBT) and filled PBT systems under isothermal experimental conditions. The experimental data have been analyzed with a nonlinear, multivariable regression…
(Abstract) We lay out the metallurgical basis for a new and robust method for joining NiTi shape-memory and superelastic alloys. It is based on the use of pure niobium as a melting-point depressant that can induce contact melting with NiTi at tractable temperatures. A strong, ductile, corrosion-resistant, biocompatibl…
Fluorine-terminated chemical bonds and dipole structures within an Al2O3 layer were investigated in this study. Spectroscopic ellipsometry (SE) was employed to estimate the characteristics of fluorinated Al2O3. The parameters S0 and λ0 extracted from SE were analyzed to detect the influence of F-terminated bonding. Al…
The growth dynamics of ZnO epilayers by metal-organic chemical vapor deposition have been investigated by a comprehensive modeling of the competitive adsorption and two-site occupation effects. The established model, based on Langmuir-Hinshelwood mechanism, well explains the abnormal growth rate dependence on the VI/I…
Optical properties of colloidal II-VI semiconductor CdSe cores with ZnS and CdS multishell quantum dots (QDs) have been studied by experimental characterization and theoretical analysis. Due to the large number of energy states densely compacted in both conduction and valence bands of the quantum dots, strong interban…
Utilizing titanyl sulfate as a TiO2 source, via a novel synthesis method—the detonation method—nanosized TiO2(n-TiO2) powders were prepared. The results showed that the as-prepared n-TiO2 powders did not have enough time to grow into large and fine crystallites, and that the characteristics of high temperature, high p…
Self-assembly of a nanotube forming molecule, hexa-peri-hexabenzocoronene (hbc), in aqueous solution is studied using a coarse-grain (CG) force-field in molecular dynamics (MD) simulations. The simulations yield details of the pre-aggregation regime, which is generally inaccessible to experimental studies. The simulat…
Large electrostrictive actuation in ferroelectric single crystals can be achieved through non-180° domain switching using various biasing fields and loads. The theoretical maximum actuation strain such as 1.1% for barium titanate crystals, however, has not been observed yet. In this letter, the authors propose a possi…
Abstract The thermal behavior of melt‐mixed polypropylene (PP)/poly(ϵ‐caprolactone) (PCL) blends was investigated with differential scanning calorimetry, and it was quantitatively related to the morphology observed through scanning electron microscopy. The PP/PCL blends were immiscible in the whole composition range;…
Abstract In this study, a series of nonionic waterborne polyurethanes containing side chain poly(ethylene glycol) monomethyl ether (PEGME) were synthesized using 4,4‐methylene bis(isocyanatocyclohexane), the nonionic dispersing center produced by isophorone diisocyanate, N ‐diethanol amine, and PEGME, and a series of…
Abstract Cardanol, a by‐product of the cashew industry, has been recently proven to be a multifunctional additive (MFA) in rubbers. It is expected that grafting of cardanol onto natural rubber (NR) would impart inherent MFA characteristics to the rubber. Grafting has been carried out in solution using toluene as the s…
We investigated micromechanical properties and ultrastructure of the shells of the modern brachiopod species Lingula anatina , Discinisca laevis , and Discradisca stella with scanning electron microscopy (SEM, EDX), transmission electron microscopy (TEM) and Vickers microhardness indentation analyses. The shells are c…
GeSbSe chalcogenide thin films were deposited using glancing angle deposition onto transparent glass substrates for the determination of the spectral behavior of the optical constants (index of refraction n and extinction coefficient k) in the visible and near infrared ranges (400–2500nm) as a function of the depositi…
Three kinds of carbon conductive additives, i.e. multi-walled carbon nanotubes (MWNTs), vapour grown carbon fibres (VGCFs) and acetylene carbon blacks (AB), were investigated to improve the electrochemical performance of activated carbon (AC) used as electrode materials for supercapacitors. Galvanostatic charge/discha…
Abstract To prepare thermoplastic polyurethane (TPU)/ethylene‐octylene copolymer (POE) blends, which are thermodynamically immiscible, maleated POE and aminated POE were incorporated as compatibilizers. Effect of addition of the compatibilizers and their contents on morphology, coalescence, and mechanical properties o…
PURPOSE: The aim of this study was to evaluate the effect of finishing and polishing agents on surface roughness of cast commercially pure titanium using scanning electron microscope (SEM) analysis. MATERIALS AND METHODS: A standardized square steel die measuring 10 x 10 mm with a thickness of 2 mm was machine cut. An…
The variable pressure or environmental scanning electron microscope (VP-SEM; ESEM) has become the microscope of choice for many scientists and technologists. Hence, the development of robust methods for X-ray microanalysis, limited by skirting, has become critical. In this paper, two pressure variation correction meth…
Abstract Blends of poly(vinyl chloride) (PVC) with different ratio of poly(ethyl methacrylate) were characterized with respect to their physical, mechanical, thermal, and morphological properties. The blends indicated a gradual rise in the modulus and ultimate tensile strength values followed by a reduction in the per…
Abstract Irradiation of ultrasonic waves induces cavitation in a solution, and a chemical action instigated by radicals occurs. This chemical action is reported to be most efficient in the region of several hundred kilohertz frequencies. Application of sonochemistry based on ultrasonic chemical action remains at the l…
Highly fluorescent and stable CdSe/ZnS core/shell quantum dots (QDs) coated with gemini surfactant are successfully synthesized in aqueous media. Analyses of luminescence spectrometry, ultraviolet–visible (UV–vis) spectrophotometry, and transmission electron micrographs (TEMs) indicate that the water-soluble QDs are m…