Materials Literature
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Carbon nanomaterials (carbon nanotubes, graphene, etc.) have received significant attention from the academia and industry in the past two decades owing to their superior material properties. Mechanicians have played a major role in the fundamental understanding of the mechanical properties of carbon nanomaterials, an…
A reacao da (3,4-metilenodioxi)acetofenona com a tiossemicarbazida foi realizada em uma solucao de etanol e agua, em proporcao 3:1, respectivamente e catalisada com acido cloridrico. A solucao foi refluxada durante 6 h. Apos o resfriamento e filtracao, foram obtidos cristais adequados para a difracao de raios-X. A sin…
Glasses are defined as super cooled liquids, and possess transparency with amorphous structure. SiO2 and B2O3 are commonly used glass formers for commercial glasses preparation. SiO2 glass is used in many household applications. Borate glasses play a significant role in various optical applications. Glasses containing…
One of the greatest technological hurdles to deployment of fuel cells relates to the sluggish activity, low durability and the high cost of the catalysts that are currently employed. For automotive PEM fuel cells to become commercially viable, the Pt-specific power density would need to be reduced to less than 0.2gPt/…
In this paper, the design and analysis of a hexagonal left-handed material is presented, which is based on the analysis of the structural parameters. The effective permittivity and the effective permeability of the designed hexagonal left-handed material are simultaneously negative in the range from 7.4GHz to 7.9GHz.…
Abstract : In the last report, reflectance analyses performed on the old aligned carbon nanotube sample CS089N (CNT/Ni/TiN/Si) revealed a sharp drop in reflectance for the CNT coated sample as compared to its TiN coated Si substrate. New CNT samples are produced and analyzed hereafter for their transmittance, reflecta…
In order to improve the light catalytic performance, I put forward Electronic structure primary principle research based on Anatase phase TiO2. Based on primary principle theory, we design the calculation of Anatase phase TiO2 electronic structure according to the analysis of Anatase phase TiO2 electronic structure an…
Experimental research of rail grinding quantity with single grinding wheel has been implemented on GMC-96 rail grinding train in this paper. Firstly, this paper put forward a new idea that rail grinding quantity is defined as the cross-sectional area difference between the profile curves of pre-grinding and post-grind…
Abstract According to the producing mechanism of the harmonic current, the equivalent circuit of harmonic current for the high speed motorized spindle (HSMS) is established. Meanwhile, the formulas of oscillation harmonic torque, fluctuating speed and motor loss are developed on the basis of the superposition principl…
Laser nano-patterning with near-field optical microscope (NSOM) and the associated energy transport analysis are achieved in this study. Based on combined experimental/theoretical analyses, it is found that laser nano-patterning with a NSOM probes strongly depend on the laser conditions and material properties of the…
Comptes Rendus Chimie - In Press.Proof corrected by the author Available online since vendredi 31 mai 2013
The field of molecular magnetism has expanded rapidly since the discovery of single molecule magnets (SMMs) in the 1990’s and has witnessed extraordinary advances in the last several decades. One of the current trends in molecular magnetic research is to incorporate metal ions that have pronounced single-ion anisotrop…
The direct methanol fuel cell (DMFC) is ideal if high energy-density liquid fuels are required. Liquid fuels have advantages over compressed hydrogen including higher energy density and ease of handling. Although state-of-the-art DMFCs exhibit manageable degradation rates, excessive fuel crossover diminishes system en…
Semiconductor quantum dots (QDs) are luminescent nanocrystals offering bright and narrow emissions from UV to near-infrared. As a result, they find numerous applications as light emitters in a wide range of technologies, from photonics to biotechnologies. Among these materials, heterostructures such as core-shell QDs…
Porcelain string insulators are widely used in high voltage transmission lines. Calculation of potential distribution is extensively performed to design and develop high voltage insulators. In this paper a three-dimensional (3-D) potential analysis software (Maxwell) is applied to calculate potential distribution of 2…
Bacterial biofilm colonies attached to orthopedic implants, and surrounding tissues resist to antibiotic treatments, prolong hospitalization, increase mortality, and usually require the removal and replacement of the entire joint.Through acoustic cavitation, it could be possible to remove the biofilm colonies from the…
In \cite{PK}, the authors constructed a translation plane of order arising from replacement of a sporadic chain of reguli in a regular spread of . They also showed that two more non isomorphic translation planes, called and , arise respectively by derivation and double derivation in which correspond to a further repla…
Photoinduced electron transfer (ET) in dyads consisting of zinc porphyrins or zinc phthalocyanines as the electron donors and fullerene C60 as the electron acceptor was studied in different environments. Time-resolved absorption and emission spectroscopy studies were performed to monitor the populations of the transie…
A broad description for gene therapy might include both the replacement of absent or defective genes using plasmid DNA and the selective interference with signaling pathways involved in the genesis of various diseases by knocking down mRNA expression using RNA interference (RNAi) technology. The use of RNAi has a grea…
En The increased use of heating in many medical specialties is driven by the availability of new devices, not an understanding of the underlying physics. Whereas most prior studies have quantified material response characteristics before and after thermal damage, the goal of this work is to describe changing response…