Materials Literature
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Motivated by a controversy over the correct results derived from the dynamic renormalization group (DRG) analysis of the non linear molecular beam epitaxy (MBE) equation, a self-consistent expansion (SCE) for the non linear MBE theory is considered. The scaling exponents are obtained for spatially correlated noise of…
We obtain the statistics of the intensity, transmission and conductance for scalar electromagnetic waves propagating through a disordered collection of scatterers. Our results show that the probability distribution for these quantities, x, follow a universal form x^a Exp(-x^m) . This family of functions includes the R…
I present here theory of PZT thin film - MgO substrate system thermal expansion effect. I show that elastic properties of the substrate have to be taken into account to describe this effect.
We have presented the kinetic study of the very initial growth stages of an ultra thin film (40 $Å$- 150$Å$) of Ag sputter-deposited on Si(001) substrate containing native oxide using grazing incidence x-ray reflectivity (GIXR) technique and Atomic Force Microscopy (AFM). We observe that the film consists of mounds wi…
A series of polymer−clay nanocomposite (PCN) materials that consisted of poly(methyl methacrylate) (PMMA) and layered montmorillonite (MMT) clay were prepared by effectively dispersing the inorganic nanolayers of MMT clay in an organic PMMA matrix via in situ thermal polymerization. Organic methyl methacrylate monomer…
Magnetic properties and magnetovolume effects have been investigated for itinerant-electron metamagnetic $\mathrm{La}({\mathrm{Fe}}_{x}{\mathrm{Si}}_{1\ensuremath{-}x}{)}_{13}$ compounds. At the Curie temperature ${T}_{C1},$ a first-order magnetic phase transition takes place in the concentration range $0.86<~x<…
The interaction of NO, NO 2, or NO/O 2 mixtures with Pt/Al 2 O 3, Ba/Al 2 O 3, and Pt−Ba/Al 2 O 3 catalysts has been investigated by IR spectroscopy and temperature-programmed desorption. Upon NO interaction, small amounts of nitrites, nitrates, and hyponitrite species were formed on the Ba-containing samples. The NO…
Poly(glycolic acid) (PGA) has long been a popular polymer in the tissue engineering field. PGA possesses many favorable properties such as biocompatibility, bioabsorbability, and tensile strength. The traditional fiber formation techniques of melt extrusion and cold-drawing are generally limited to fibers of 10–12 μm…
A photoinduced method for converting large quantities of silver nanospheres into triangular nanoprisms is reported. The photo-process has been characterized by time-dependent ultraviolet-visible spectroscopy and transmission electron microscopy, allowing for the observation of several key intermediates in and characte…
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
An algorithm has been developed that generates all of the nonequivalent closest-packed stacking sequences of length N. There are 2(N) + 2(-1)(N) different labels for closest-packed stacking sequences of length N using the standard A, B, C notation. These labels are generated using an ordered binary tree. As different…
n-Hexadecylamine (HDA) has been used as a template to synthesize a mesolamellar vanadium phosphate (VPO) phase. FTIR studies indicate covalent interaction of the amine head with the vanadyl groups of the VPO matrix, in contrast to the other reported syntheses of mesostructured VPO phases which involve ionic interactio…
Abstract The polarized (VV) and depolarized (VH) light scattering spectra of polyisobutylene, poly(methyl methacrylate), and glycerol were measured in the gigahertz frequency range at temperatures below and above the glass transition. Both VV and VH spectra exhibit a significant constant loss contribution that appears…
Liposomes or (phospho)lipid vesicles are self-assembled colloidal particles that occur in nature or can be prepared artificially. In the beginning, liposomes were used to study biological membranes, while several practical applications, most notably in drug delivery, emerged in the 1970s. After three decades of researc…
Spontaneously forming hydrogels composed of 2-methacryloyloxyethyl phosphorylcholine (MPC) copolymers, poly(MPC-co-methacrylic acid) (PMA), and poly(MPC-co-n-butyl methacrylate) (PMB) were examined. The MPC copolymer hydrogel was observed to have a spontaneous gelation property. To determine the properties of the hydr…
Abstract From the nano-world of rusty proteins and magnetic compasses in bacteria to the macroscopic structures of oyster shells, corals, ivory, bone and enamel, biology has evolved a new type of chemistry that brings together the synthesis and construction of hard and soft matter for the design of functionalized inor…
The properties of poly(styrene- co -itaconate) ionomers were studied dynamic mechanically. It was observed that ionic moduli increased as ion content increased and that the increased ionic modulus values were comparable to those of well-clustered polystyrene ionomers. It was also found that only a very weak cluster lo…
Two new lithiated phases of V(6)O(13) were formed by carefully tuning the temperature of electrochemical lithiation in a "coffee-bag" type Li-ion battery at 2.78 V versus Li/Li(+). These were studied by single-crystal X-ray diffraction. A phase with the composition Li(2/3)V(6)O(13) was obtained at 308 K with a unit ce…
A photoinduced effect has been studied in the quasi-one-dimensional conductor K(0.3)MoO(3). A weak photoexcitation of the sample can drastically affect the dynamic phase transition of the charge-density wave (CDW) motion from slide to creep. The origin of the photoeffect is attributed to a local destruction of the CDW…
Abstract Several highly soluble polyimides were synthesized from various aromatic tetracarboxylic dianhydrides and an aromatic diamine containing tert ‐butyl pendent groups [4,4′‐methylenebis(2‐ tert ‐butylaniline)]. All the polyimides showed excellent solubility in common solvents such as chloroform, tetrahydrofuran,…