Materials Literature
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Abstract This review covers the drastic morphological changes, including division or birthing dynamics, and even spontaneous movements performed by molecular self-assemblies constructed by reactive amphiphiles with the imine group that connects hydrophilic and hydrophobic moieties. It turns out that the formation (deh…
The effect of internal fields on the activation energy of creep in polycrystalline ferroelectric ceramics is investigated. It is shown that the internal fields can be evaluated directly from the experimental curves for polarization creep under constant electric field. For this purpose a micro-mechanical model of therm…
The second- and third-generation multiple dendrimers based on naproxen in core and Asp(4–6) oligopeptides in periphery were synthesized in a convergent approach and well characterized by NMR and mass spectral (MS) techniques. These conjugates showed a high affinity to hydroxyapatite in vitro and provided an effective…
X-ray photoelectron spectroscopy (XPS), magnetic and dielectric studies were performed for flux grown PbFe 1/2 Nb 1/2 O 3 (PFN) single crystals. The core level XPS spectra show that the Pb, Nb and O ions exist in one valence state while Fe ions in two Fe 2+ and Fe 3+ states. Temperature dependences of magnetic suscept…
Heteropolyacid–phosphomolybdic acid has been found to be an efficient and recyclable catalyst for cyclotrimerization of acetophenones into 1,3,5-triarylbenzenes in good yields.
The ground states of the actinides and their compounds continue to be matters of considerable controversies. Experimentally, Americium-I (Am-I) is a non-magnetic dhcp metal whereas theoretically an anti-ferromagnetic ground state is predicted. We show that hybrid density functional theory, which admixes a fraction of…
The full potential all electron linearized augmented plane wave plus local orbitals (FP-LAPW + lo) method, as implemented in the suite of software WIEN2K, has been used to systematically investigate the structural, electronic, and magnetic properties of the actinide compounds AnN (An = Ac, Th, Pa, U, Np, Pu, Am). The…
Ab initio total energy calculations within the framework of density functional theory have been performed for atomic hydrogen and oxygen chemisorption on the (0001) surface of double hexagonal packed americium using a full-potential all-electron linearized augmented plane wave plus local orbitals method. Chemisorption…
We investigate the nonlinear evolution of the Bales-Zangwill instability, responsible for the meandering of atomic steps on a growing vicinal surface. We develop an asymptotic method to derive, in the continuous limit, an evolution equation for the two-dimensional step flow. The dynamics of the crystal surface is grea…
Fundamental theories governing the number of fiber intersections in random nonwoven fiber webs were developed based on the planar geometry of fiber midpoints distributed in a two-dimensional Poisson field. First, the statistical expectation and variance for the number of fiber intersections in unit web area were obtai…
Amplification of metal-complexed polymerized diaminobenzidine by two light-insensitive physical developers was systematically examined in a dot blot model system following either polymerizing diaminobenzidine in the presence of transition metal salts or applying the metal salts post-diaminobenzidine polymerization. Th…
This paper presents our detailedly theoretical analyses on omnidirectional constant transmission and negative Brewster angle at planar interfaces associated with a uniaxial medium. The amplitude reflection and transmission coefficients at planar interfaces associated with uniaxial media are derived by examining the bo…
Phonons in K 0.5 Na 0.5 NbO 3 (KNN-50) ceramics were investigated from 10 to 900 K by means of Raman, infrared and THz spectroscopy. A first-order phase transition was detected from cubic to tetragonal phases at about 710 K, when the first component of the polarization appears. Transition from the tetragonal to the or…
An analysis of certain types of multiplicative congruential generators--otherwise known for their application to the sequential generation of pseudo-random numbers--reveals their relation to the coordinate description of lattice points in two-dimensional primitive sublattices. Taking the index of the lattice-sublattic…
Abstract A film of carboxymethyl‐β‐cyclodextrin‐intercalated Zn–Al layered double hydroxide (CMCD–LDH) was investigated for selective adsorption of the nucleosides adenosine (A) and guanosine (G). The effects of pH value and adsorption time on the adsorption behavior were studied. The CMCD–LDH film shows a higher sele…
Abstract We report that nano‐emulsions can be creatively used as a morphology selective synthesis method to prepare not only nano‐grains but also nano‐fibers with high selectivity. Synthesis of the two different morphological materials was demonstrated using polyaniline synthesis as a model case. Polyaniline nano‐grai…
The secondary structures of protected (neutral) and deprotected (charged) second generation dendronized polymethylmethacrylates carrying chiral 4-aminoproline-based dendrons were investigated using atomistic molecular dynamics simulations. Trajectories involving a total of approximately 280 ns on molecular systems con…
Bi 0.9 La 0.1 Fe 1 − x Mn x O 3 ceramics with compositions x = 0. 0.1. 0.2, 0.3, 0.4 and 0.5 were prepared by solid state reaction. Ceramics with lower Mn content (x < 0.4) tend to a single phase composition even after calcination at 650°C for 2 hours. Unlikle the porous Bi 0.9 La 0.1 FeO 3 ceramic sample, homogeneous…
In 2-ethoxybenzamide, C(9)H(11)NO(2), the amide substituents are linked into centrosymmetric head-to-head hydrogen-bonded dimers. Additional hydrogen bonds between adjacent dimers give rise to ribbon-like packing motifs, which extend along the c axis and possess a third dimension caused by twisting of the 2-ethoxyphen…
Two-photon fluorescence microscopy and confocal reflectance microscopy were compared to detect intracellular gold nanorods in rat basophilic leukaemia cells. The two-photon photoluminescence images of gold nanorods were acquired by an 800 nm fs laser with the power of milliwatts. The advantages of the obtained two-pho…