Materials Literature
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Este trabalho descreve a caracterização de cinzas do bagaço de cana-de-açúcar produzidas a partir de queima controlada e moagem ultrafina. Inicialmente, as condições ótimas de queima do bagaço foram determinadas com o objetivo de alcançar a máxima atividade pozolânica. Em seguida, uma cinza ultrafina de elevada reativ…
Due to its chemical stability, uniform pore size, and high pore density, nanoporous alumina is being investigated for use in biosensing, drug delivery, hemodialysis, and other medical applications. In recent work, we have examined the use of atomic layer deposition for coating the surfaces of nanoporous alumina membra…
Effects of phosphorus concentration, [P], and postgrowth annealing on the x-ray diffraction and Raman scattering from ZnO:P thin films are presented. The ZnO (0002) diffraction peak exhibits a large monotonic angular shift with increasing [P] up to 5.1×1019 cm−3 while its shift upon annealing is dependent on [P]. No e…
Fluorescent nanoparticles have received much attention for their potential applications in biology and medicine, such as uses as fluorescence markers or imaging agents. Recently, surface-passivated carbon nanoparticles or "carbon dots" were demonstrated to be brightly fluorescent, thus representing a new platform for…
Sizable Residual Quasiparticle Density of States Induced by Impurity Scattering Effect in Ba(Fe1−xCox)2As2 Single Crystals, Mu Gang, Zeng Bin, Cheng Peng, Wang Zhao-Sheng, Fang Lei, Shen Bing, Shan Lei, Ren Cong, Wen Hai-Hu
Molecular MRI plays an important role in studying molecular and cellular processes associated with heart disease. Targeted probes that recognize important biomarkers of atherosclerosis, apoptosis, necrosis, angiogenesis, thrombosis and inflammation have been developed. This review discusses the properties of chemicall…
The synthesis and complexation to Eu(III) of two macrocyclic ligands functionalized donor-phenylethynyl-moieties as sensitizer is presented. The two ligands based on DTPA bis-amide ( [Eu(L 1 )] ) and DO3A ( [Na][Eu(L 2 )] ) have been chosen because of their increased stability in water for potential applications as lu…
We consider a quasi-linear parabolic equation with nonlinear dynamic boundary conditions occurring as generalizations of semilinear reaction-diffusion equations with dynamic boundary conditions and various other phase-field models, such as the isothermal Allen-Cahn equation with dynamic boundary conditions. We thus fo…
Polycaprolactone (PCL) is a Food and Drug Administration (FDA) approved biodegradable polyester used in tissue engineering applications. Ibuprofen is an anti-inflammatory drug which has good solubility in supercritical CO 2 (SCCO 2 ). The solubility of CO 2 in PCL allows for the impregnation of CO 2 -soluble therapeut…
We present the first fast and facile microwave assisted synthesis of polyaniline (PANI) nanofibers ("MWA synthesis"). Under conventional synthesis (CS), the polymer was produced with 79.7% yield after 5 h at ambient temperature. However, under microwave irradiation, the nanofibers were produced with yield of 76.2% aft…
1 H NMR dilution experiments were used to monitor self-association of acridine in solution in four different solvents. The pattern of complexation-induced changes in chemical shift is similar in chloroform, methanol, and carbon tetrachloride, which implies that the aggregate has a similar structure in these three solv…
Electron beam induced deposition of organometallic precursors has emerged as an effective and versatile method for creating two-dimensional and three-dimensional metal-containing nanostructures. However, to improve the properties and optimize the chemical composition of nanostructures deposited in this way, the electr…
In this paper, we studied the influence of the silver nanoparticles size on the electrical conductivity of PEDOT:PSS in Ag(PEDOT:PSS) films. The silver nanoparticles were synthesized in presence of PEDOT:PSS by varying the molar ratio between AgNO3 and the reducing agent (NaBH4). Both the particle size determined by T…
New methods are proposed for preparing aqueous sols of nanocrystalline ceria stabilized by citric or polyacrylic acid. Transmission electron microscopy and UV-Vis spectroscopy were used to study the stability of sols in hydrothermal treatment at temperatures in the range of 120–210°C.
Trivalent rare-earth (RE3+) ion-doped TiO2 nanophosphors belong to one kind of novel optical materials and have attracted increasing attention. The luminescence properties of different RE3+ ions in various TiO2 nanomaterials have been reviewed. Much attention is paid to our recent progresses on the luminescence proper…
Catalysts based on Co-Mg-Al, which were used for the total oxidation of toluene, were synthesized by using the hydrotalcite pathway. The calcination allowed us to obtain various mixed oxide types (i.e. Co 3 O 4 , Co 2 AlO 4 or CoAl 2 O 4 ), presenting mesopores of about 8 nm and high specific surface areas. The solids…
CaMnO 3 is a parent compound for numerous multicomponent manganese perovskite oxides. Its crystallographic data are of primary importance in the science and technology of functional CaMnO 3 -based materials. In the present study, data were collected for a CaMnO 3 sample at 302 K. The crystal structure refinement yield…
Abstract Exploiting the potential of the material for the photovoltaic applications requires an extensive defect level analysis, mandatory. Photoluminescence (PL) technique was employed to probe the defect levels in p‐SnS thin films deposited using chemical spray pyrolysis (CSP) technique. Three PL emissions were reco…
We study phase separation in suspensions of two unrelated species of rod-like bacteria, Escherichia coli and Sinorhizobium meliloti , induced by the addition of two different anionic polyelectrolytes, sodium polystyrene sulfonate or succinoglycan, the former being synthetic and the latter of natural origin. Comparison…
Specific features of the catalytic behavior of supported palladium nanoparticles were analyzed in terms of both the size of the particles and their interaction with the support. The influence of these factors on the activity and selectivity of palladium nanoparticles in carbon-carbon bond hydrogenolysis, hydrogenation…