Materials Literature
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X-shaped rigid methylthio arylethynes (MTA) have been demonstrated to mediate the assembly of gold nanoparticles. The structural attributes of MTAs include molecular rigidity, π-conjugation, and importantly the tunability in terms of size, shape, and binding strength. The size, kinetics, optical, and spectroscopic pro…
Block copolymers constitute an important class of soft material capable of self-assembling into nanoscale microdomains with well-defined geometries. The cylindrical domains thus formed have been found to pack almost exclusively in hexagonal lattice. In this study, we disclose how the mesomorphic molecular order can me…
The critical adsorption point (CAP) of self-avoiding walks (SAW) interacting with a planar surface with surface disorder or sequence disorder has been studied. We present theoretical equations, based on ones previously developed by Soteros and Whittington [ J. Phys. A.: Math. Gen. 2004, 37, R279−R325], that describe t…
Tb-doped SiO 2 nanowires have been synthesized through a vapor−liquid−solid (VLS) mechanism. The morphology and compositional characteristics of the doped nanowires have been investigated by various microscopy techniques. The prepared nanowires have amorphous characteristics with a diameter distribution range from 15…
The threading behavior of a zinc analogue of a previously reported processive manganese porphyrin catalyst onto a series of polymers of different lengths is reported. It is demonstrated that the speed of the threading process is determined by the opening of the cavity of the toroidal porphyrin host, which can be tuned…
Radiolabeling studies were employed to investigate the influence of structure on the efficiency of surface functionalization for poly(acrylic acid)-coated shell crosslinked nanoparticles (SCKs) with two types of amine-terminated DOTA chelators. An intricate interplay between the chemical and physical properties of bot…
Zn1-xCuxAl2O4 (0 < or = x < 0.30) compounds have been synthesized by polyesterification using metallic salts and annealing at low temperatures as well as by conventional solid state. XRD-powder data refinements (Rietveld method) have demonstrated that both compound series crystallize in the spinel structure (Fd3m) and…
Three novel polyphosphazene-functionalized diaminobutane poly(propyleneimine) dendrimers have been prepared and investigated for their properties as prospective hydrophobic drug delivery systems. The solubilization and release properties of these functionalized dendrimers have been investigated by absorption and fluor…
The structural aspects of a soft chemical route 1 employed to obtain nitrogen-doped brookite, rutile, or anatase fine crystallite powders are revealed by total X-ray diffraction and atomic pair distribution function analysis. It is found that the route first passes through a heavily disordered phase consisting of nano…
We report on the synthesis of telechelic poly( N -isopropylacrylamides) (PNIPAM) via nitroxide-mediated controlled polymerization, putting a focus on the introduction of defined end group moieties into telechelic poly( N -isopropylacrylamide) and poly( n -butyl acrylates). Various functional groups, linked to the cent…
The genome of Pseudomonas putida KT2440 encodes five proteins of the phosphoenolpyruvate-carbohydrate phosphotransferase system. Two of these (FruA and FruB) form a dedicated system for fructose intake, while enzyme I(Ntr) (EI(Ntr); encoded by ptsP), NPr (ptsO), and EII(Ntr) (ptsN) act in concert to control the intrac…
We found that the topology of cleavable polymer from linear to hyperbranched can be tuned simply by varying the polymerization temperature: linear polymers were produced at temperatures ≤ 40 °C, hyperbranched polymers were obtained at elevated temperatures (≥ 48 °C); the degree of branching (DB) of hyperbranched polym…
The temperature dependence of the fluorescence of trace levels of pyrene was employed to measure the glass transition temperatures ( T g s) of polystyrene (PS) domains within ultrathin films of poly(styrene- block -methyl methacrylate) (P(S- b -MMA)) and poly(styrene- block -2-vinylpyridine) (P(S- b -2VP)) diblock cop…
A new diamine containing a pyridine heterocyclic group and a pyrene substituent, 4-(1-pyrene)-2,6-bis(4-aminophenyl)pyridine ( PBAPP ), was synthesized and used in a preparation of poly(pyridine−imide) by direct polycondensation with 4,4‘-hexafluoroisopropylidenediphathalic anhydride (6FDA) in N -methyl-2-pyrrolidinon…
This paper considers the feasibility of replacing indium tin oxide (ITO) with spin-coated, polymer-based composite films that are filled with multiwalled carbon nanotubes (MWNTs). The coating mixture consists of a solvent with low volatility, a dissolved thermoplastic polymer, and MWNTs. The high aspect ratio of MWNTs…
Tensile tests were carried out by deforming polycrystalline samples of Al-2.5%Mg alloy at room temperature in a wide range of strain rates where the Portevin-Le Chatelier (PLC) effect was observed. The experimental stress-time series data have been analyzed using the recurrence analysis technique based on the Recurren…
The ordering of the classical Heisenberg antiferromagnet on the triangular lattice with the the bilinear-biquadratic interaction is studied by Monte Carlo simulations. It is shown that the model exhibits a topological phase transition at a finite-temperature driven by topologically stable vortices, while the spin corr…
An iron(II) complex with ferrocenyl groups, [Fe(dppFc) 2 ](BF 4 ) 2 ·2Et 2 O ( 1 ·2Et 2 O, dppFc = 1-ferrocenyl-2-{(2,6-bis(pyrazolyl)pyridyl}ethylene), was prepared. X-ray crystallographic analyses revealed that 1 ·2Et 2 O underwent a single-crystal-to-single-crystal transformation with the release of crystal solvent…
A solution-phase route has been developed for the synthesis of single-crystal CuO nanoribbons with widths of 10−80 nm, thicknesses of 5−20 nm, and lengths ranging from several hundred nanometers to several micrometers and for nanorings with diameters of 100−300 nm. The CuO nanoribbons and nanorings were fabricated by…
Novel type II CdTe−CdSe semiconductor nanocrystal heterostructures (SNCHs) with multiple-branched rod morphology were synthesized by epitaxial growth of CdSe from CdTe nanocrystals in solution, and the SNCHs were characterized by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), energy-dispersive sp…