Materials Literature
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Increasing numbers of workers are involved with the production, use, distribution, and disposal of nanomaterials. At the same time, there is a growing number of reports of adverse biological effects of engineered nanoparticles in test systems. It is useful, at this juncture, to identify critical questions that will he…
Fuel cell electric vehicles (FCEV) has higher efficiency and lower emissions compared with the internal combustion engine vehicles. But, the fuel cell has a slow dynamic response. Therefore, a secondary power source is needed during start up and transient conditions. Ultracapacitor can be used as secondary power sourc…
The sequence of phase transitions due to octahedral tilting across the Sr(Zr,Ti)O(3) solid solution series has been investigated by resonant ultrasound spectroscopy at high and low temperatures using ceramic samples. The elastic behaviour associated with phase transitions as a function of composition in Sr(Zr,Ti)O(3)…
We report the synthesis and characterization of two series of novel triphenylene–anthraquinone-based symmetric discotic liquid crystalline trimers. These triads were prepared using microwave dielectric heating. Conventional heating under similar reaction conditions failed to produce desired products. To the best of ou…
We outline the ability of zinc phosphate coatings, obtained by chemical conversion, to protect mild steel rebars against localized corrosion, generated by chloride ions in alkaline media. The corrosion resistance of coated steel, in comparison with uncoated rebars and coated and uncoated steel rebars embedded in morta…
Concerns about the potential health hazards of nanomaterials are growing. To determine the potential toxicity of metal oxide nanoparticles, human SH-SY5Y neuroblastoma and H4 neuroglioma cells were exposed to Fe2O3, CuO and ZnO nanoparticles and their metal ion counterparts (Fe3+, Cu2+ and Zn2+) at a concentration ran…
Abstract Gold nanoparticles deposited on a TiO 2 single‐crystalline substrate as model structure of Au/TiO 2 catalysts were observed by HAADF‐STEM (high‐angle annular dark field scanning transmission electron microscope) to investigate the interface structure. The atomic columns of Au and Ti were clearly identified, a…
The wetting phase transition at low-angle intercrystallite grain boundaries has been experimentally observed. In contrast to the high-angle grain boundaries with the misorientation angels θ > 15°, the low-angle grain boundaries (θ < 15°) are not continuous two-dimensional defects, but constitute a discrete wall (netwo…
The crystallization of amorphous SiO2 powder with free water and silicon–hydroxy group (Si-OH) was investigated in the range of 0–4.2 GPa and 150–1200 °C. The samples were detected by X-ray diffraction, transmission electron microscopy, thermogravimetry and differential thermal analysis, Raman and Fourier transform-in…
Scapolite-group minerals are a group of rock-forming framework aluminosilicates common in a wide variety of igneous and metamorphic rocks. They have the general formula M 4 [ T 12 O 24 ] A , where M represents Na, K, Ca, Sr, Ba and Fe 2+ , T stands for Si, Al, (Fe 3+ ), and A represents Cl, (CO 3 ), (SO 4 ). They cons…
One of the major objectives of research in heterogeneous catalysis has been the correlation of catalytic performance with the structure and composition of the catalyst. Development of applicable general concepts has been slow, especially with supported metals, where numerous factors of the solid determine its ability…
A distribuição dos minerais da fração argila depende de condições pedoambientais específicas. O estudo das relações entre atributos desses minerais e locais específicos de sua ocorrência na paisagem torna-se importante para o entendimento das relações entre a mineralogia e os demais atributos do solo. Este trabalho te…
DC power transmission is gaining considerable importance and converter transformers form an important component in it. An insulation of these transformers is stressed by both ac and dc voltages. Particle contamination is one of the major problems in insulation structures as it generates partial discharges (PD). If a p…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Zongrong Wang, Tao Hu, Liwen Tang, Ning Ma, Chenlu Song, Gaorong Han, Wenjian Weng, Piyi Du; Ag n…
Abstract Liquid‐crystalline dendrons carrying either a thiol or disulfide function which display nematic, smectic A, columnar, or chiral nematic phases have been synthesized. Their mesomorphic properties are in agreement with the nature of the mesogenic units and structure of the dendrons. The first‐generation poly(ar…
Graphene is a novel material that reveals many remarkable properties. Academic and industry research groups around the globe are carrying out theoretical and experimental studies to discover and investigate characteristics of graphene. Due to its outstanding properties, graphene has a potential to revolutionize techno…
Two laboratory experiments were set up in order to investigate the influence of different parameters on slot partial discharge (PD) activity. The goal of the first experiment was to establish the relative importance of temperature and gap size on slot partial discharges (PDs). The second experiment was used to determi…
Abstract In this overview, the basic concepts of core and valence photoelectron spectroscopy (photoemission), photoelectron diffraction, and photoelectron holography are introduced. Then some current developments in these techniques that should enhance their utility for atomic‐level characterization of new materials a…
The oxidative pyrolysis kinetics of wheat straw was studied by thermogravimetric analysis (TGA) under oxygen dynamic atmosphere. Nonisothermal TGA data at three heating rates of 5, 10, and 20 K min −1 were analyzed. The kinetic conversion data calculated from the TGA data were fitted by the Weibull and logistic mixtur…
The study deals with thermal and optical properties of poly(methyl methacrylate) (PMMA) containing 2wt% calcium carbonate (CaCO3) nanofiller. It was found that the thermal conductivity increases with increasing temperatures, due to thermal activation of the phonons in the PMMA/CaCO3 nanocomposite. This enhancement in…