Materials Literature
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A tripeptide containing an Aib (α-amino isobutyric acid) residue self-assembles to form porous nanomaterials in solid state. In spite of having a hollow nanotubular structure, the self-assembly nature of the peptide is different, which leads to the formation of pores with different internal diameters. The single-cryst…
The photoconductivity of samples including both individual nanorods and bundles self-assembled from meso -tetra(4-sulfonato-phenyl)porphine grows over several days of illumination by more than a factor of 15. It also shows a transition from an initially nonpersistent response (in which the conductivity goes to zero wh…
A hybrid tetrathiafulvalene–oligothiophene compound has been synthesised, in which the fulvalene unit is fused on both sides to an end-capped septithiophene oligomer. The compound (1) has been studied by cyclic voltammetry, UV-vis spectroelectrochemistry and X-ray crystallography. The properties of this material are c…
We theoretically study the Shapiro steps in a hetero-Josephson junction made of a single-gap superconductor and a two-gap one. We find that an anomalous dc Josephson current is induced by tuning the frequency of an applied microwave to the Josephson-Leggett mode frequency, which creates an extra step structure in the…
Abstract The inhibition of the corrosion of mild steel in HCl by some cyclopentadiene‐1,3‐diene derivatives, namely, 1‐(thiophen‐2‐yl)ethanone (2APT), 1‐(1H‐pyrrol‐2‐yl)ethanone (2AP), and (E)‐2‐(1‐hydrazonoethyl)‐1H‐pyrrole (2APH)), was studied experimentally using weight loss and hydrogen gas evolution measurements.…
Cyclic octapeptides composed of α-amino acids alternated with cis-3-aminocycloalkanecarboxylic acids, self-assemble as drumlike dimers through β-sheet-like, backbone-to-backbone hydrogen bonding. Heterodimerization appears to be significantly more favored than homodimerization, and this represents a novel approach for…
Selective solubilization of semiconducting single-walled carbon nanotubes (SWNTs) by polymer wrapping leads to bright luminescence even in bundles because of suppression of deexcitation processes via metallic SWNTs. We investigate photoluminescence (PL) properties of polymer-wrapped SWNTs in a paper form by means of P…
Plastics occupy wide place in the applications of automotive, electronics and house goods. Especially reinforced plastics become popular because of their high strength besides their advantages of low weight and easy manufacturability. In this study, mechanical and morphological properties of polypropylene (PP) and hig…
By coupling a temperature probe to the asymmetric three-terminal mesoscopic dielectric system, ballistic thermal rectification at low temperature is analytically studied based on the Landauer formulation of transport theory. It is seen that thermal rectification is a purely quantum effect and the quantum statistics of…
Yttria-stabilized zirconia (YSZ) is modeled using a cluster expansion statistical thermodynamics method built upon a density-functional theory database. The reliability of cluster expansions in predicting atomic ordering is explored by comparing with the extensive experimental database. The cluster expansion of YSZ is…
The main gas phase intermediates, leading the efficient chemical vapor deposition (CVD) growth of single wall carbon nanotubes (SWCNTs), have been explored through systematic experimental and theoretical studies. The growth efficiencies of the basic radical/neutral species (sp 2 C 2: C 2 H 3 /C 2 H 4, sp 3 C 2: C 2 H…
Improved biodegradable vascular grafts and stents are in demand, particularly for pediatric patients. Poly(L-lactic acid) (PLLA) is an FDA-approved biodegradable polymer of potential use for such applications. However, tissue culture studies have shown that endothelial cell (EC) attachment and growth occurs relatively…
We report the first observation of chiral colloidal liquid crystals of rod-like particles from a low molecular weight organic compound—phytosterols. Based on the particles shape and crystal structure, we attribute this phenomenon to chiral distribution of surface charge on the surface of neighbouring rods.
The influence of disorder and stoichiometry-breaking point defects on the structural and magnetic properties of Sr 2 FeMoO 6 have been investigated with the help of electronic structure calculations within the spin-polarized GGA+ U approach. Defining the chemical potentials of the constituent elements from constitutio…
A uniform and smooth transfer of stresses across the polymer matrix/fiber interface is enhanced when adhesion between the matrix and fiber surface is optimized. In the absence of covalent bonds matching the Hansen solubility (cohesion) parameters (HSP) of the fiber surface with the HSP of a matrix polymer assures maxi…
Hydrogen-bonded monohydroxy alcohols belong to unique group of materials that characterize with additional prominence the Debye relaxation peak occurring in dielectric loss spectra. This exponential relaxation process is accompanied by another faster, less pronounced and asymmetric structural relaxation process. The d…
This paper presents enhanced dehydrogenation of solid ammonia borane (AB, NH 3 BH 3 ) at 85 °C after it was preheated at 80 °C for 2−4 h. Thermal treatments and subsequent hydrogen release experiments were carried out in a Hastelloy cell mounted on a high-pressure differential scanning calorimeter. With increased preh…
γ-Al(2)O(3) is a well known catalyst support. The addition of Ce to γ-Al(2)O(3) is known to beneficially retard the phase transformation of γ-Al(2)O(3) to α-Al(2)O(3) and stabilize the γ-pore structure. In this work, Ce-doped γ-Al(2)O(3) nanowires have been prepared by a novel method employing an anodic aluminium oxid…
The phase transitions in thin films of a block copolymer, BCP, that forms micelles when exposed to immiscible solvent vapors, were investigated at two different temperatures. Pre-swelling with a non-volatile solvent was used to prevent dewetting prior to the addition of a volatile solvent used to affect the annealing.…
Nearly spherical morphology of solution-grown NaCl particles in the size range of 300−1000 μm was achieved at 55−60 °C employing a suitable crystallizer equipped with a butterfly wing-shaped impeller operated at 250 rpm. Morphology control was equally effective with synthetic and natural brines and required no habit m…