Materials Literature
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4-Ethylanilinium hydrogen (2R,3R)-tartrate, a novel wide-temperature-range ferroelectric was synthesized. DSC measurement discloses that the homochiral organic salt undergoes an isosymmetric reversible phase transition at about 186 K with a sharply narrow heat hysteresis of 0.7 K. The heat capacity Cp obtained from th…
With the increasing use of simulations in materials research and design, it is important to quantify the differences between, and accuracy of, models used in these simulations. Here we present the results of such a comparison for four embedded-atom models of aluminum that were optimized to have good liquid properties,…
Morphological control by magnetic fields: The application of magnetic fields is found to result in fluctuation of the energy of the Co3O4 crystal surface, which hinders the growth of {100} faces, and thus leads to the preferred formation of Co3O4 nanocubes. However, in the absence of external magnetic fields during sy…
Abstract Magnetic nanoring structures are attractive for spintronic devices due to their unique attributes of well‐defined and reproducible magnetic states originating from their characteristic geometry. Almost all previous magnetic nanorings have been exclusively limited to traditional ferromagnetic materials, and a…
PbSe nanocrystals have been synthesized by conventional hot injection process and also using microwave technique. For PbSe nanocrystals obtained via hot injection process at 160 °C, the quality of the interface between the isolated and purified nanocrystals, after removal of capping ligands, strongly depends on the st…
Oleic acid capped lead sulfide (PbS) and lead selenide (PbSe) were synthesized, then subjected to a postsynthesis washing in a 1:1 ethanol/hexane solution. The relationship of third order nonlinear optical properties to nanocrystal surface chemistry as affected by washing was analyzed using nanosecond 532 nm Z-scan an…
We present a patterning method for hierarchically aligned assembly of single-walled carbon nanotubes (SWNTs) using a combination of the Langmuir-Blodgett (LB) technique and soft lithography. The LB technique allows one to control the alignment and the surface density of SWNTs by adjusting surface pressure of the film…
H 2 O 2 direct synthesis over a palladium catalyst based on sulfated ceria (Pd−CeS) has been studied in a trickle-bed reactor at −10 °C. The combined effect of liquid and gas flow rates was studied by independent variations. The maximum productivity and selectivity was always found at flow rate combinations intermedia…
Abstract The effects of twin‐screw extrusion processing conditions upon the formation of polypropylene/titanium dioxide (PP/TiO2) nanocomposites are investigated. To prepare PP/TiO2 nanocomposites by limiting the problem of filler dispersion at the nanoscale, an original method was developed based on the creation of T…
A functionally cooperating device has been fabricated by combining a pH-responsive surface with hydrogen peroxide-responsive platinum, which displays a diving–surfacing cycle towards mimicking a submarine. This smart device may open a new avenue to the research of nanoscience and bridge the gap between active nanomate…
The recent search for superhard materials concentrated on diborides of the $5d$ transition metals because of their high elastic moduli. Using density-functional theory we report a systematic study of the shear-induced irreversible structural transformations and plasticity in ${\text{ReB}}_{2}$ which limits its strengt…
Abstract Bundles of homogeneously alloyed Cu2−x(SySe1−y) nanowires with various compositions (0 ≤ y ≤ 1) are controllably prepared via a simple water‐evaporation method under mild conditions. It is found that the nanowire bundles have similar copper contents (0.37 ≤ x ≤ 0.44) and morphologies, and the same face center…
A de novo designed peptide-based gel has been prepared whose mechanical rigidity can be modulated after shear-thin recovery. The photopolymerizable β-hairpin peptide named MLD undergoes temperature-induced folding and self-assembly to afford a network of β-sheet-rich fibrils that constitutes a moderately rigid hydroge…
Stationary and time-resolved studies of 9,10,19,20-tetramethylporphycene and 9,10,19,20-tetra-n-propylporphycene in condensed phases reveal the coexistence of trans and cis tautomeric forms. Two cis configurations, cis-1 and cis-2, play a crucial role in understanding the excited-state deactivation and tautomer conver…
Synthetic biodegradable polymers serve as temporary substrates that accommodate cell infiltration and tissue in-growth in regenerative medicine. To allow tissue in-growth and nutrient transport, traditional three-dimensional (3D) scaffolds must be prefabricated with an interconnected porous structure. Here we demonstr…
The Ni(II) and Cu(II) complexes of four azo compounds (H2L1–4), namely, 2-(p-X-phenylazo)-4-acetamidophenol (X = OCH3, NO2, Br, and H for H2L1, H2L2, H2L3, and H2L4, respectively) were prepared and characterized on the basis of their analytical, spectroscopic, magnetic, and conductance data. The isolated complexes are…
A systematic study is reported of the growth of vertically aligned few layered graphene (FLG) nanoflakes on Si (100) substrates by microwave plasma enhanced chemical vapour deposition (MPECVD) method. Asymmetric grazing incident angle X-ray diffraction (GIAXRD) studies revealed a structural transformation, from nanocr…
The fabrication and characterization of poly(vinylcarbazole) (PVK)-conjugated polymer network (CPN) anticorrosion coatings on flat surfaces, steel coupons or indium tin oxide (ITO) glass substrates, is reported. Electrochemical deposition methods (potentiostatic and potentiodynamic) were employed by anodic oxidation o…
The Raman spectra of Si nanocrystals are studied as a function of nanocrystal diameter using pseudopotential density functional theory and the Placzek approximation. Our calculations reproduce the redshift and broadening of the optical Raman peak with decreasing nanocrystal size, and calculated peak frequencies show g…
Selective catalytic reduction (SCR) is a promising diesel after treatment technology that enables low nitrogen oxides (NOx) tailpipe emissions with relatively low fuel consumption. Future emission legislation is pushing the boundaries for SCR control systems to achieve high NOxconversion within a tailpipe ammonia (NH3…