Materials Literature
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The present study reports the design and synthesis of nine C2-symmetric 5,15-[bis(arayl)]-10α,20β-[bis(1,2:3,4-di-O-isopropylidene-α-D-galactopyranose-6-yl)]porphyrins (3–11) bearing electron donating or electron withdrawing substituents and a D2-symmetric 5α,10β,15α,20β-tetrakis(1,2:3,4-di-O-isopropylidene-α-D-galact…
Nanoparticulate imaging probes have become an increasingly important arsenal in the visualization of molecular markers for early diagnosis and post-therapy assessment of diseases. Surface functionalization of these nanoparticles has led to the development of a variety of targeted nanoprobes for various imaging modalit…
The synthesis, structures and magnetic properties of a new trinuclear spin crossover complex, [FeII3(npt)6(EtOH)4(H2O)2](ptol)6·4EtOH (1), and of its CoII (2 and 3) and NiII (4) analogues, are reported here. The complexes were synthesized by reacting a 1,2,4-triazole-based ligand, 4-(4′-nitrophenyl)-1,2,4-triazole (np…
A simple method for controlling the wettability properties of poly(ethyleneterephthalate) (PET) fibers is reported herein. Silica nanoparticles (silica NPs) and multi-walled carbon nanotubes (MWCNTs) coated on PET fibers altered both the surface roughness and the surface energy of the fibers and endowed the PET fibers…
The simultaneous combination on CCD detectors of both spectral and spatial information is used in the framework of the single molecule (SM) bi-analyte Surface-Enhanced Raman Scattering (SERS) technique, to provide a new level of understanding on the origins of SM-spectra, as well as reveal the advantages and limitatio…
A reactive supramolecular hydrogel sensitive to the presence of aldehydes is reported. Its fast disassembly in the presence of hydrophobic aldehydes allows the use for the release of substances (i.e. drugs) entrapped within the gel network.
Abstract A research project was conducted to investigate the effect of a high salt concentration on corrosion from low partial pressures of hydrogen sulfide (H2S). The main objective was to study if the high concentration of chloride could initiate localized attack in this type of H2S system. Experiments were conducte…
Different K pools in 197 surface and subsurface soil samples of southern Iran were determined to accurately assess factors affecting K pools distribution. Mineralogical analysis indicated that smectite, mica, chlorite, and palygorskite were the major minerals in the clay fractions. We obtained significant relationship…
The β-sheet structure associated with chlorinated aromatics (d(Cl···Cl)≈ 4.0 Å) has been implemented to drive formation of π-stacked structures of dithiadiazolyl radicals. Both title compounds exhibit an increase in paramagnetism above 150 K but solid-state EPR studies indicate that the origin of the paramagnetism in…
The synthesis and fractionation of poly[2,7-(9,9-dioctylfluorene)-alt-2,5-(3-dodecylthiophene)] resulted in the isolation of eight different molecular weight (Mw) samples ranging from Mn of 5 to 85 kg mol−1. These individual polymer samples were fully characterized by Gel Permeation Chromatography, Nuclear Magnetic Re…
L-Leucine amino acid functionalized cellulose whiskers were synthesized via esterification reaction which comprised the reaction between Fmoc–L-leucine and cellulose whiskers and removal of Fmoc-protecting group. This strategy provides a direct, facile way to merge the properties of these biocompatible materials and o…
Novel polyhedral 26-facet CuS microcages decorated with amazingly unique crystalline structures as building blocks were successfully synthesized via a facile sacrificial Cu2O templates solution route. Each of the polyhedral 26-facet CuS microcages has a composition of three pairs of square mesostructural shells, four…
When the dimensions decrease to nano-scale, many essential phenomena appear which are not important at macro scales. In this paper, two effects of these sub-micron phenomena are demonstrated and considered for simulation of pull-in instability of beam-type nano-actuator. The first phenomenon that becomes important at…
A thermodynamic assessment of the Bi-Mn binary system was conducted using the CALPHAD approach. Consistent thermodynamic descriptions, which agreed well with the selected experimental data, were obtained using a sub-regular solution model for solution phases and a line-compound model for intermetallic compounds. There…
Silica hollow nanospheres (SHNS) are used as new nanoscaffold materials to confine ammonia borane (NH(3)BH(3), AB) for enhancing the dehydrogenation process. Different loading levels of AB in SHNS are considered and AB/4SHNS (with AB content of approximately 20 wt%) shows the best result. The onset temperature of the…
The long-term charge/discharge cycling stability of MnO 2 electrode under positive polarization in aqueous KCl electrolyte has been studied over different potential windows spanning from the open circuit potential to varied higher-end potential limited by O 2 evolution. Cycling up to 1.2 V (vs Ag/AgCl (aq) ) causes pa…
This paper describes the development of multi-functional nanofiber scaffolds consisting of multiple layers of nanofiber scaffolds and nanofiber-incorporated poly(ethylene glycol) (PEG) hydrogels. As a proof-of-concept demonstration, we fabricated micropatterned polymeric nanofiber scaffolds that were capable of simult…
Valence Evaluation of Cerium in Nanocrystalline CeO2 Films Electrodeposited on Si Substrates, Fernandes, V., Graff, I. L., Varalda, J., Amaral, L., Fichtner, P., Demaille, D., Zheng, Y., Schreiner, W. H., Mosca, D. H.
The corrosion behavior of TiC particles reinforced Mg-Al alloy in 3.5% NaCl solution has been evaluated using electrochemical techniques. Tested alloys included an Mg-9Al (Mg AZ91E) alloy with and without 56 wt. % TiC particles. Electrochemical techniques included potentiodynamic polarization curves, linear polarizati…
In order to realize copper-based electrode materials for printed electronics applications, it is necessary to control the oxidation reaction during the sintering process. Here we report a novel approach based on the conversion process of cuprous oxide (Cu2O) nanoparticle aggregates (NPAs) to metallic copper crystals.…