Materials Literature
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The effect of current density and sodium chloride concentration in solution on the phase composition and pore structure of the products of ac electrolysis of metallic Sn has been studied using X-ray diffraction, thermogravimetry, differential scanning calorimetry, electron microscopy, and low-temperature nitrogen adso…
This article reports improved mechanical properties of epoxy/polyaniline nanowires nanocomposite (EP/PANI) by using para-hydroxybenzene sulfonic acid as the dopant. The PANI nanowires show no chain dedoping in the EP. Mechanical properties of the nanocomposites were maintained while achieving its conductive state and…
Fiber-like high-surface-area and natural nanostructure clay mineral palygorskite (or attapulgite, ATP) containing lots of hydroxyl groups is found to efficiently catalyze the ring-opening polymerization (ROP) of ϵ-caprolactone (ϵ-CL). The products are subsequently characterized by FTIR, 1H NMR, GPC, DSC, SEM and XPS a…
The influence of the organic ionic salt crystal 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST) and 4-(N,N-dimethylamino)-4′-nitrostilbene (DANS) dyes on structure, and piezoelectricity of Poly (styrene-co-acrylonitrile) (SAN) copolymer has been studied by several techniques. X-ray diffraction and optical…
Net retention volumes, VN, of n-alkanes and five polar solute probes on cellulose acetate butyrate – Polycaprolactonediol have been determined by inverse gas chromatography technique in the temperature range 323.15–393.15 K. The VN values of n-alkanes are used to calculate the dispersive component of surface energy of…
Pulsed laser deposition was used to grow thin (1–100 nm) magnesium oxide films directly on graphite and epitaxial graphene on SiC(0001). The authors observe very smooth (typical rms roughness of ∼0.4 nm) film morphologies that are nearly independent of film thickness and conformal to the substrate for films grown on r…
Abstract Nanostructured conductive polypyrrole has been prepared electrochemically on the surfaces of Cu/Au interdigital electrodes in the presence of Fe(II) as catalyst and ClO4− as anion dopant by using constant potential amperometry and cyclic voltammetry. The morphology of the conducting films was examined by fiel…
This study was carried out to assess the effect of strain paths and residual delta ferrite on failure characteristics of austenitic stainless steels cold rolled to 20% reduction. Optical metallography was carried out to determine grain size and quantify residual delta ferrite. Mechanical tensile tests to failure along…
Experimental investigations of highly vertically aligned carbon nanotubes (CNTs), also known as CNT-arrays, are the main focus of this paper. The free strain as result of an active material behavior is analyzed via a novel experimental setup. Previous test experiences of papers made of randomly oriented CNTs, also cal…
This part deals with the description of the first Upper Jurassic microfloras frorn South America. Fifty seven palinomorph species frorn seven microfIoristic associations, found in gray shales and distributed within the lowermost 160 m of the local Tithonian sequence, belong to the following genera: Deltoidospora, Todi…
Electronic structure and magnetism of charge disproportionated CaCu3Fe4O12 observed at low temperatures are studied by first-principles calculations. A ferrimagnetic order is found to be stable and calculated x-ray magnetic circular dichroism (XMCD) spectra at Fe and Cu \(L\)-edges are consistent with recent experimen…
Equilibrium configuration of order parameter in a nematic liquid crystal droplet with homeotropic anchoring of finite strength at the surface is studied numerically by using the Landau–de Gennes approach. It is found that a hedgehog-like configuration with a disclination loop of a small radius is stable for strong anc…
Three novel hydroquinone-based symmetrically and unsymmetrically substituted subphthalocyanine (SubPc) dimers have been synthesized through the axial substitution of the macrocycle. The mono SubPc hydroquinone derivative (Hq-SubPc) first prepared acts as a nucleophile which replaces the chlorine atom of the second Sub…
The instability of a polyisoprene (PI) thin film on a silicon substrate at room temperature in an aqueous environment was investigated by atomic force microscopy and optical microscopy. The instability mechanism changes from spinodal dewetting to hole nucleation with increasing film thickness, with the transitional th…
Certain investigation was done on the removal of heavy metals (Cu2+ and Ni2+) from aqueous solution using adsorption process. The prepared cellulose-g-acrylic acid copolymer was used as an adsorbent to remove heavy metal ions from aqueous solutions. The efficiency of the adsorbent was identified from the variation in…
Cationic peptide amphiphile nanoparticles are employed for co-delivery of immune modulator CpG and antigen. This results in better targeting to the antigen presenting cells and eliciting strong Th1 response, which is effective against the intracellular pathogens.
Different Keggin‐type heteropolycompounds were used in Pechmann reaction to obtain biologically active coumarins. Effect of solvent, catalyst loading, and molar ratios of substrates was studied to introduce the best reaction condition. The optimized reaction condition was extended to Pechmann reaction of methylacetoac…
Perovskite type LaMnO 3 and related materials are important compounds with many useful and unique physical and chemical properties. There is a lack of experimental thermochemical data on the energetics of LaMnO 3 nanoparticles. In this work, a series of LaMnO 3+δ samples were synthesized via the citrate method and cal…
The adsorption of benzene in the cation-containing metal–organic framework (MOF) MIL-141(Cs) was explored by manometry measurements coupled with Monte Carlo simulations. This joint experimental/modeling approach demonstrates that this solid shows a high affinity for benzene that does not result from a direct interacti…
A three-dimensional constitutive model for shape memory alloy (SMA) behaviors, implemented in an Abaqus user material subroutine, was used to examine localization of elastic and phase transformation fields due to the presence of structured arrays of holes in a NiTi plate. Simulations of the superelastic responses of t…