Materials Literature
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We report on the fabrication of well-aligned multi-segment line patterns over large areas featuring dimensional and compositional exquisite tunability using a combination of photolithography and soft-lithography techniques. We show that thus this new top-down approach has great advantages and that it is beneficial by…
The use of nanotechnologies for the targeted delivery of therapeutic agents is a research strategy which can lead to more efficacious drugs fulfilling unmet medical needs. The morphology, supramolecular organization and properties of first, second and third generation nanocarriers used for the targeted delivery of dru…
Space and ground level electronic equipment with semiconductor devices are always subjected to the deleterious effects by radiation. The study of ion-solid interaction can show the radiation effects of scattering and stopping of high speed atomic particles when passing through matter. This study had been of theoretica…
Biodegradable particles of poly(glycolide-co-p-dioxanone) (PGDO) were directly synthesized by suspension copolymerization of glycolide (GA) and p-dioxanone (PDO) in supercritical carbon dioxide (scCO2) using stannous octoate as the ring-opening catalyst and a fluorocarbon polymer surfactant as a stabilizer. Fine powde…
Silver nanoparticles deposited on FTO conductive glass substrate have been incorporated within n-type WO3 films formed by a sol-gel method. A large enhancement in water splitting photocurrents under AM1.5 visible light irradiation for the WO3 photoanode with embedded Ag nanoparticles was observed. The ability of Ag na…
ACTIVITY OF CZ AND PD-CZ CATALYST. Automotive catalyst, using in Brazil since 1992, is a essential technology for vehicular emissions control. Noble metals are the active phase of these catalysts, and cerium zirconium mixed oxides (CZ), responsibles for the oxygen storage capacity (OSC), one of the most important aspe…
A new salt-[Ni(II)(DMSO)(5)(TTFPy)](2)[α-SiW(12)O(40)] (1)-based on polyoxometalates was prepared by coordinating a cationic electron donor of pyridyltetrathiafulvalene (TTFPy) with Ni(II). Although the TTFPy molecule did not form a salt with the anionic α-[SiW(VI)(12)O(40)](4-) because of the weak charge-transfer (CT…
Poly (butylenes succinate) (PBS) was synthesized by using1, 4-butanediol and succinate as starting material, titanic acid ester and acetate as catalyst, and tried to improve PBS by changing end-group to carboxyl, hydroxyl and chlorine. The results of GPC showed, molecular weight of four kinds of polymer was all beyond…
Mn/Y co-doped Ba0.67Sr0.33TiO3 films with different double buffers were prepared by radio-frequency magnetron sputtering. The buffer dependence of the microstructure and electrical properties of the films was investigated. The results show that the thin films deposited on STO/LNO/Pt (111) and LNO/Pt (111) substrates p…
Cell culture medium, which must be discarded during medium change, may contain many cells that do not attach to culture plates. In the present study, we focused on these floating cells and attempted to determine their usefulness for cartilage regeneration. We counted the number of floating cells discarded during mediu…
We have investigated dielectric and acoustic properties of PbFe1/2Nb1/2O3 ceramics, obtained by conventional ceramic technology, in 120–450 K temperature interval. Dielectric response showed diffused dielectric permittivity maximum caused by ferroelectric phase transition around 380 K, but no dielectric anomalies asso…
We report a new recipe to synthesize heterogeneous catalyst arrays using the space specificity of an embodied micelle. Also, SEM, AFM, STEM, and TXRF analyses prove that these catalysts are of exposed core-shell types. Furthermore, their structures were found to allow the design of a high performance photocatalyst for…
BACKGROUND: The treatment of peptic ulcer disease poses therapeutic challenges to both patients and physicians alike because of the tendency of ulcers to relapse. Drugs used in the treatment of this disease are either costly or are associated with high incidence of adverse effects. Synclisia scabrida is a plant used i…
A fundamental interest as well as need for high level of integration of ferroelectric and related materials stimulates research of nanoscale effects. In this contribution we present a study of perovskite PbSc1/2Nb1/2O3 (PSN) nanograin ceramics performed by means of dielectric spectroscopy. Experimental results clearly…
Este trabalho desenvolve um estudo teórico-experimental sobre a correlação entre parâmetros térmicos e os espaçamentos dendríticos primários da liga Sn-5%Pb solidificada direcionalmente em um sistema horizontal sob condições transientes de extração de calor. Os perfis de temperatura foram medidos em diferentes posiçõe…
Poly(ethylene terephthalate) (PET) / poly(ethylene) (PE) granules coming from a post-industrial packaging stream, were characterized through selective extractions followed by infrared analysis. Different granules batches resulted in a different thermal stability and in yellowing. After the characterization work the pr…
The thermal relaxation behavior of residual stress and microstructure at elevated temperatures in S30432 austenite steel after shot peening was investigated by X-ray residual stress analyzer. The effect of the exposure time and the applied temperature on the residual stress and microstructure relaxation was particular…
GaN nanomaterials are displaying infinite develop potential in blue light-emitting diode (LED).Therefore, the preparation of low-cost and high-powered GaN nonmaterial has been one of the focuses for scientific researchers. It is known that different catalysts have different impacts on the surface and function of GaN i…
Highly energy transfer and asymmetric polarization of europium doped Si-O polar structures comprised of nc-Si in mesoporous silica induces 50-fold enhancement of green photoluminescence and demonstrates programmable characteristic with 10μs pulse.
Abstract The capillary flow porometry (CFP) is generally used for measuring the bubble point pressure corresponding to largest through pore–size in the membrane. In present work, the CFP technique was used for developing a methodology for determination of the neck–size distributions in the synthetic membranes. It is i…