Materials Literature
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Abstract Summary: Toluene decomposition is examined using a corona discharge, a UV lamp, and a TiO 2 catalyst complex system. The toluene decomposition reaction occurs only with OH and O ( 1 D) radicals. High decomposition ratios are obtained: 98% for the toluene/H 2 O/O 2 ‐corona/UV system and 70% for the toluene/H 2…
In an evaporating aqueous paracetamol solution, crystallisation of the metastable orthorhombic polymorph can occur at the solution–substrate contact line due to a favourable meniscus geometry and enhanced evaporation rates at the edges. Upon the addition of polymers or other common excipients to these systems, it was…
Open ended…︁ A plasma-etch method, using a nanopore alumina film as the mask, was used to etch a replica of the alumina pore structure into the surface of a photoresist film; the thickness of the nanopore layer is controlled by the etch duration. The pores in such plasma-etched films were then used as templates to pre…
A block copolymer containing a rodlike block is studied for its adsorption and formation of nanostructured thin films on the substrate surface. The block copolymer is poly(styrene-b-3-triethoxysilylpropylisocyanate) (PS-b-PIC) of which the PIC chain consists of repeating amide units with triethoxysilyl side groups. As…
The fragility and the anharmonicity of (Ag 2 O) x (B 2 O 3 ) 1− x borate glasses have been quantified by measuring the change in the specific heat capacity at the glass transition temperature T g and the room-temperature thermodynamic Grüneisen parameter. Increasing the silver oxide content above X = 0.10 leads to an…
Surface-initiated grafting of N,N-dimethylacrylamide, styrenesulfonate (SS), and (ar-vinylbenzyl)trimethylammonium chloride (VBTAC) from microwave plasma carboxylated, initiator-functionalized poly(dimethylsiloxane) (PDMS) surfaces was accomplished utilizing reversible addition-fragmentation chain transfer (RAFT) poly…
A method is described for using resonant x-ray scattering to separately quantify the charge (valence) modulation and the strain wave associated with a charge density wave. The essence of the method is a separation of the atomic form factor into a ``raw'' amplitude ${f}_{R}(\ensuremath{\omega})$ and a valence-dependent…
The fabrication of nanoporous templates from poly(styrene)-b-poly(methyl methacrylate) diblock copolymer thin films (PS-b-PMMA, volume ratio 70:30) on silicon requires precise control of interfacial energies to achieve a perpendicular orientation of the PMMA cylindrical microdomains relative to the substrate. To provi…
The kinetics of the catalytic reduction of NO by CO on Rh(111) surfaces was investigated by using dynamic Monte Carlo simulations. Our model takes into account recent experimental findings and introduces relevant modifications to the classical reaction scheme, including an alternative pathway to produce N2 through an…
Abstract Atomic force microscopy was successfully applied for comprehensive nanoscale surface and bulk morphological characterization of thermoplastic elastomeric triblock copolymers: poly[styrene‐ b ‐(ethylene‐ co ‐butylene)‐ b ‐styrene] (SEBS) having different block lengths and their clay based nanocomposites. Comme…
Frequency and dc magnetic field dependences of dynamic susceptibility in diluted paramagnets $\mathrm{Li}\mathrm{Y}{\mathrm{F}}_{4}:{\mathrm{Ho}}^{3+}$ have been measured at liquid helium temperatures in ac and dc magnetic fields parallel to the symmetry axis of a tetragonal crystal lattice. Experimental data are anal…
This work reports the fabrication and testing of flexible carbon nanotube microdevices made using hot embossing material transfer. Both micro-plasma and photodetector devices were made using as-grown unpurified multi-wall carbon nanotubes printed on PMMA substrates. Optical detectors were fabricated by attaching metal…
Structural refinement using both neutron powder diffraction data and Raman \nspectroscopy were carried out to determine the site preference of Ce atoms \nand structural changes in Bi4−xCexTi3O12 (x = 0, 0.25, 0.5 and 0.75) \ncompounds. In the Raman spectroscopic study, the peak at 65 cm−1 of \nBi4Ti3O1…
We have extended the structural and magnetic phase diagrams of the bilayer Ruddlesden-Popper phase ${\mathrm{Sr}}_{3}{\mathrm{Co}}_{2}{\mathrm{O}}_{x}$ beyond previously reported limits of $x\ensuremath{\approx}6.1$ to $x=6.60$. The room temperature crystal structure for the $x=6.60$ material is orthorhombic with oxyg…
In this paper we investigate nitrogen- and boron-doped zigzag and armchair single-wall carbon nanotubes (SWNTs) with theoretical models based on the density functional theory. We take into account nitrogen and boron doping for two isomers in which substitutive atoms are on opposite sides of the tube, but only in one i…
The synthesis and magnetoelectric (ME) characterization of bilayers of Pb(Zr,Ti)O 3 (PZT) and hot-pressed ferrite Ni 0.8 Zn 0.2 Fe 2 O 3 (NZFO) are discussed. Very strong ME interactions are measured for the bilayers. The bilayers exhibit superior ME coupling compared to thick film composites prepared with the tape-ca…
Polycrystalline ${\mathrm{Sr}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$ (SFMO) samples with various grain sizes and densities of $\mathrm{Fe}∕\mathrm{Mo}$ disorder defects were synthesized from sol-gel-derived precursors by means of a sample-encapsulation technique. The samples with perfect $\mathrm{Fe}∕\mathrm{Mo}$…
p-type (Bi 2 Te 3 ) x (Sb 2 Te 3 ) 1− x alloys with homogeneous and fine microstructure were prepared by the mechanical alloying–hot pressing (MA–HP) method in the present work. X-ray diffraction, energy dispersive x-ray spectroscopy, scanning electron microscope–backscattered electron imaging were performed to charac…
BACKGROUND: Circular Dichroism (CD) spectroscopy is a widely used method for studying protein structures in solution. Modern synchrotron radiation CD (SRCD) instruments have considerably higher photon fluxes than do conventional lab-based CD instruments, and hence have the ability to routinely measure CD data to much…
The effect of alkyl group substituents on the degradation kinetics of poly(alkyl methacrylates) namely, poly( n -butyl methacrylate) (PBMA), poly(isopropyl methacrylate) (PPMA), poly(ethyl methacrylate) (PEMA), and poly(methyl methacrylate) (PMMA) under supercritical and subcritical conditions was studied at various t…