Materials Literature
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In order to better understand the physical basis of the biological activity of nanoparticles (NPs) in nanomedicine applications and under conditions of environmental exposure, we performed an array of photophysical measurements to quantify the interaction of model gold NPs having a wide range of NP diameters with comm…
N,N′-(4,4′-carbonyl-diphthaloyl)-bis-(L-phenylalanine)diol (p4) as novel chiral diol was prepared from L-phenylalaninol (2) and 4,4′-carbonyldiphthalic dianhydride (3) in dry acetic acid under refluxing conditions in high yield and characterized with Fourier transform infrared (FTIR), 1 H-NMR and 13 C-NMR. The step-gr…
We quantified the anisotropy of various lattice models used in polymer simulations based on two quantities: the Fourier transform of the normalized Boltzmann factor of allowable bonds on a lattice (which is the central quantity for describing lattice chain conformations) and the bulk lamellar period at the mean-field…
Abstract In the course of annealing Mn 3 O 4 and Pd/PdO nanocrystals co‐encapsulated within a nanosized silica sphere under a reducing environment, we observed that the reduction of Mn 3 O 4 into MnO was facilitated by the Pd/PdO nanocrystals. Successive annealing at high temperatures induced the MnO nanocrystals to r…
Abstract The influence of small amounts of poly(styrene‐ co ‐acrylonitrile) (SAN) on the non‐isothermal cold crystallization behavior and morphology of poly(ethylene terephthalate) (PET) was investigated by dynamic‐mechanical thermal analysis, differential scanning calorimetry (DSC), optical microscopy, and scanning e…
Abstract The effect of propylene–ethylene copolymers (PEc) with different ethylene‐unit contents on melting and crystallization behaviors of isotactic‐polypropylene (iPP) were investigated by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). The results show that the addition of PEc decreas…
In this paper we explain the origin of the ring structure that sometimes forms a sharp border surrounding field-emission electron microscopy patterns from carbon nanotubes (CNTs) at high current. The rings turn out to be due to the self-focusing of thermal-field electrons emitted from the near-cap shank of a CNT that…
Kinetics of heterogeneous catalytic reactions on nanoclusters is considered. The size of organic molecules used in various catalytic transformations is often ca. 0.5-1 nm, whereas nanoparticles in the range 2-4 nm are used in supported heterogeneous catalysts. Proposed quantitative treatment of a heterogeneous catalyt…
Abstract Several poly(pyridinium salt)s containing various organic counterions and tetraoxyethylene units in their backbones were synthesized by either ring‐transmutation polymerization reaction of 4,4'‐(1,4‐phenylene)bis(2,6‐diphenylpyrylium tosylate) with bis(2‐(2‐(4‐aminophenoxy)ethoxy)ethyl) ether on heating in di…
Abstract Solid polymer electrolytes based on poly(vinyl alcohol) (PVA) complexed with ammonium sulfate (NH 4 ) 2 SO 4 at different weight percent ratios were prepared using solution cast technique. The structural properties of these electrolyte films were examined by X‐ray diffraction (XRD) studies. The XRD data revea…
Polyhydroxyalkanoates (PHAs) serve numerous bacteria as storage compounds. It is generally believed that under unbalanced growth conditions, n-hydroxyalkanoates are synthesized inside the bacterial cells, polymerized to polyesters, and densely packed in granules. In the absence of extracellular carbon, the internally…
The photoisomerization and thermal isomerization of sterically hindered (phenylazo)pyridine derivatives with a shuttlecock-shaped (TbetNNPy) or a bowl-shaped framework (BmtNNPy as well as the azoxy counterpart, BmtNN(O)Py) have been investigated. The crystal structures of these compounds revealed a planar conformation…
The current correlation function is determined from dynamic light scattering measurements of a suspension of particles with hard spherelike interactions. For suspensions in thermodynamic equilibrium we find scaling of the space and time variables of the current correlation function. This finding supports the notion th…
Over the years, several protocols have been designed to achieve surface enhanced Raman scattering (SERS) from noble/coinage metal nanoparticles preferably with silver and gold owing to the local electromagnetic field enhancement near their surface. However, the higher value of the imaginary component of the dielectric…
Abstract Electrospinning process was used to fabricate fine fibers from poly[( R )‐3‐hydroxybutyrate‐ co ‐( R )‐3‐hydroxyvalerate] embedded with multiwalled carbon nanotubes (MWCNTs). Rotating disc collector was used to provide additional drawing force to stretch and align both the embedded MWCNTs and electrospun fibe…
An accurate full-potential linear augmented plane waves method has been used to investigate the structural stability, half-metallic ferromagnetism of the zinc-blende phase of the ferromagnetic semiconductor alloy ${\text{Al}}_{1\ensuremath{-}x}{\text{Cr}}_{x}\text{As}$. The relative stability of the zinc-blende phase…
Abstract In this study, biodegradable blend of Poly (Ethylene‐ co ‐Vinyl Acetate) (EVA) and Ethyl Cellulose (EC) were prepared. Ethylene vinyl alcohol (EVOH) copolymer was used as an interfacial compatibilizer to enhance adhesion between EVA and EC. The melt blended compatibilized biocomposites were examined for mecha…
Abstract An effective solution mixing method starting from a synthesis solution of SiO 2 nanoparticles was developed for dispersing nanoparticles into high‐density polyethylene (HDPE). Spherical SiO 2 nanoparticles with narrow size distribution (50–100 nm) were prepared by Stöber method, and solvents of the synthesis…
Photoexcited dynamics of a spin-density-wave (SDW) state in an organic linear-chain compound bis-(tetramethyl-tetraselenafulvalene)hexafluorophosphate, ${(\text{TMTSF})}_{2}{\text{PF}}_{6}$, is investigated by optical pump and terahertz probe experiments. After the ultrashort laser-pulse excitation, a sudden closing f…
Abstract A number of series of poly(acrylic acids) (PAA) of differing end‐groups and molecular weights prepared using atom transfer radical polymerization were used as inhibitors for the crystallization of calcium oxalate at 23 and 80°C. As measured by turbidimetry and conductivity and as expected from previous report…