Materials Literature
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The electronic structure and optical and magneto-optical Kerr (MOKE) spectra of La${}_{x}$Sr${}_{1\ensuremath{-}x}$MnO${}_{3}$ ($x=0.0$, 0.25) perovskites have been investigated experimentally and theoretically from first principles, using the fully relativistic Dirac linear MT-orbital band structure method in the loc…
Irradiation dynamics of a single graphene sheet bombarded by hydrogen atoms is studied in the incident energy range of 0.1 to 200 eV. Results for reflection, transmission, and adsorption probabilities, as well as effects of a single adsorbed atom to the electronic properties of graphene, are obtained by the quantum-cl…
NaCl crystals were obtained from water–formamide (H–CO-NH 2 ) solutions, either by slow evaporation at 30 °C or by programmed cooling of solutions saturated at 95 °C, the formamide concentration ranging from 0 to 100% (in weight). Accordingly, the crystal morphology changes from {100} (pure aqueous solution) to {100}…
The worldwide markets show the increased demands for natural and bio-based fibers.In 1967, the USA demand for fillers by the plastic industry was 525,000 tons; filler use had grown to 1,925,000 tons by 1998 (Eckert, 1999) and the projected use of fillers by the USA plastic industry in 2010 is to 8.5 billion pounds, of…
The effects of low molecular weight diluents (namely water and glycerol) on the nanostructure and thermodynamic state of low water content gelatin matrices are explored systematically by combining positron annihilation lifetime spectroscopy (PALS) with calorimetric measurements.Bovine gelatin matrices with a variation…
Abstract Novel electro‐conductive and mechanically‐tough double network polymer hydrogels (E‐DN gels) were synthesized by polymerization of 3, 4‐ethylenedioxythiophene in the presence of a double network hydrogel (DN gel) matrix. The E‐DN gels showed not only excellent mechanical performance, having a fracture stress…
The use of continuous processing in a Reformatsky reaction has been investigated as a means to control the large heat of reaction and reduce the inventory of hazardous materials. A laboratory-scale continuous miniplant for manufacture of an aromatic β-hydroxyester has been designed and built for a production rate of a…
Ni–Fe nanoparticles of ∼1 nm in size were synthesized by the dendrimer-templating technique using hydroxyl-terminated fourth-generation poly aminoamide (PAMAM) dendrimers. Spectroscopy and electron microscopy results are consistent with 40 atom clusters, in which all atoms are at the surface, as dictated by the synthe…
Nanocrystals growth mechanism embedded into mesoporous thin films has been determined directly from grazing incidence X-ray diffraction data. We have shown, for the first time, that surface capillary forces control the growth mechanism of nanocrystals into these nanoarchitectures. Moreover, these data allow an estimat…
Recent advances in nanotechnology have allowed for the effective use of iron oxide nanoparticles (IONPs) for cancer imaging and therapy. When activated by an alternating magnetic field (AMF), intra-tumoral IONPs have been effective at controlling tumor growth in rodent models. To accurately plan and assess IONP-based…
The surface properties of porous silicon (PSi) evolve rapidly in phosphate-buffered saline. X-ray photoelectron spectra indicate the formation of a Si-OH and C-O enriched surface, which becomes increasingly hydrophilic with aging time. Multiscale stripe micropatterns of Si and PSi have been fabricated by means of a hi…
Poly(lactic acid) (PLA)/PEG/nano-silica composite degradable films have been prepared by solvent casting method. IR measurements showed that vibration of C–O–C group was confined by silica network. SEM results showed that nano-silica particles were dispersed uniformly in the PLA/PEG matrix. TGA results indicated that…
Abstract A novel amphiphilic miktoarm star polymer, polystyrene‐poly(ethylene glycol)‐poly(methyl methacrylate), bearing a pyrene group at the end of PS arm (Pyrene‐PS‐PEG‐PMMA) was successfully synthesized via combination of atom transfer radical polymerization and click chemistry. The structure and composition of th…
Single-walled carbon nanotubes (SWCNT) embedded in a non-electroactive polymer are electrochemically characterized. The increasing voltammetric maximums obtained with rising temperature or electrolyte concentration point to a chemical nature of the processes. The chemical kinetic control of the processes is corroborat…
We demonstrate the fabrication of high-density aligned graphene nanoribbon (GNR) arrays by plasma etching of graphene sheets through a nanomask derived from self-assembled poly (styrene-block-dimethylsiloxane) (PS-PDMS) diblock copolymer films. This approach produces parallel GNR (∼12 nm wide) arrays at ∼35 nm pitch.…
Pure and Mn-doped TiO 2 films have been deposited by sputtering technique onto SiO 2 substrates. The films display a compact columnar morphology, as revealed by scanning electron microscopy. X-ray diffraction and Raman scattering results provide evidence that the pure TiO 2 films are predominantly anatase phase, but t…
The role of the seeding layer on the form of nanostructured ZnO films grown by chemical bath deposition is studied. We find that the method by which the seeding layer is deposited, the crystallite size, and the thickness have a significant effect on the morphology, density, and the critical dimensions of the ZnO nanos…
A series of neutral lanthanide complexes supported by aminophenoxy ligands were synthesized, and their catalytic behavior in the polymerization of l -lactide and rac -lactide was explored. The amine elimination reactions of equimolar amounts of Ln[N(TMS) 2 ] 3 (μ-Cl)Li(THF) 3 and aminophenol [HONH] 1 {[HONH] 1 = 2,6-M…
In this paper, colloidal silver nanoparticles were prepared by chemical reduction of AgNO3 and pure Sn in a new and simple method. The type of crystallite lattice and the size of nanopowders were estimated by X-Ray Diffraction (XRD) analysis. The geometric, heterogeneous and mixing structure of synthesized nanopowders…
In this article, zinc oxide (ZnO) nanostructures of different shapes were fabricated on silicon substrate. Well-aligned and long ZnO nanowire (NW) arrays, as well as leaf-like ZnO nanostructures (which consist of modulated and single-phase structures), were fabricated by a chemical vapor deposition (CVD) method withou…