Materials Literature
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The vibrational dynamics of vitreous germanium diselenide $(v{\text{-GeSe}}_{2})$, an amorphous glass belonging to the family of continuous random network forming glasses, has been investigated by means of inelastic neutron scattering. We employed three different neutron spectrometers, each of them providing different…
The magnetic ordering transition coupled to a structural transition in the anisotropic triangular lattice ${\text{CuMnO}}_{2}$ is investigated by high-resolution neutron powder diffraction. Temperature dependence of the magnetic order parameter and relevant structural quantities, such as cell constants and atomic posi…
We have investigated drift and hysteresis characteristics on an electrolyte-solution-gate field-effect transistor (SGFET) with a unique structure using polycrystalline diamond and verified the possibility as chemical sensors and biosensors. Silicon-based ion-sensitive field effect transistors (ISFETs) have not yet sol…
Polyelectrolyte multilayers (PEMs) produced by layer-by-layer (LbL) self-assembly find different applications. Often the PEMs are exposed to mechanical stress which they have to sustain. A correlation of the mechanical properties of PEM on macroscopic level with the ordering of polyelectrolyte molecules on molecular l…
Abstract In this work, we conducted kinetic simulations to examine the effects of various experimental conditions on cyclization during the feed of α,ω‐telechelic polymers into a reaction mixture. The simulations showed that the interplay between the feed rate and rate coefficients for cyclization and multiblock forma…
Ag nanoparticles synthesized on n and p-type Si were shown to exhibit charge-selective surface-enhanced Raman scattering and fluorescence quenching. As revealed by electric force microscopy, the polarity and magnitude of the nanoparticle charge is controllable with the metal-semiconductor Fermi level difference and na…
A combination of scanning tunneling microscopy and density functional theory has been used to investigate the interactions between water molecules and terminal hydroxyls (OH t ’s) adsorbed on the TiO 2 (110) surface at 300 K. We show that OH t ’s have a significant effect on the water reactivity. Two distinctive react…
Nanofibres fabricated from synthetic polymers via electrospinnning may be uniform and possess consistent quality; however, due to the nature of polymers, these nanofibres may not serve as suitable substrates for cell adhesion. Thus, the present work is aimed to enhance cell adherence onto the as spun poly(ϵ-caprolacto…
Abstract A novel nonoxidative method for preparation of functionalized multiwalled carbon nanotubes (MWCNT) has been developed based on a UV sensitive initiator for atom transfer radical polymerization (ATRP). The method has been investigated with respect to ligands and polymerization time for the preparation of polys…
Graphene and carbon nanotube (CNT) structures have promise for many electronic device applications and both have been grown on SiC through the decomposition of the substrate. It is well known that both graphene and aligned CNTs are grown under similar conditions with overlapping temperature and pressure ranges, but a…
High temperature treatment of SiC surfaces is a well-established technique for producing graphene directly on top of an insulating substrate. In this domain an important question is the influence of the substrate on the atomic and electronic structure of the graphene layers. This requires a detailed investigation of t…
Abstract In elastomer/organo clay nanocomposites, the morphological characteristics, and hence the mechanical properties, of the vulcanizates are strongly influenced by the organic modifier and the vulcanization process. When the elastomer itself undergoes strain‐induced crystallization, both the organic modifier and…
In this review paper, the processes for the fabrication of carbon nanoparticles, carbon nanospheres, carbon onions, onion-like carbons and metal-filled carbon nanocapsules are reviewed. These processes include carbon arc discharge, metal catalysed chemical vapour deposition, thermal pyrolysis of organometallics and na…
The current status of long, self-organized, epitaxial graphene ribbons grown on the (0 0 0 −1) face of 6H–SiC substrates is reviewed. First, starting from the early stage of growth it is shown that on the C face of 6H–SiC substrates the sublimation process is not homogeneous. Most of the time it starts from defective…
The production of O 2 -enriched air and of high-purity oxygen was studied in a flow-through and in a dead-end permeator with BaCo x Fe y Zr 1− x − y O 3−δ (BCFZ) hollow fiber membranes at high temperatures using (i) pressurized air/O 2 -enriched air as feed, (ii) reduced pressure on the permeate side, and (iii) a comb…
Protons in the NH + ···N hydrogen bonds linking the cations into strictly linear aggregates in the crystal of 1,4-diazabicyclo[2.2.2]octane hydroiodide ([C 6 H 13 N 2 ] + ·I −, dabcoHI) remain disordered, and the average crystal symmetry (space group P 6̅ m 2) remains unchanged, down to 1.5 K, as evidenced by single-c…
The square antiprism/twisted square antiprism ratio in LnDOTA-tetraamide chelates is a critical parameter in governing water-exchange kinetics and ultimately the utility of a chelate as a PARACEST MRI contrast agent. In LnDOTA-tetraamide chelates with tertiary amides, this ratio and the rate of interconversion between…
Abstract Biocompatible and biodegradable ABC and ABCBA triblock and pentablock copolymers composed of poly(ε‐caprolactone) (PCL), poly( L ‐lactide) (PLA), and poly(ethylene glycol) (PEO) with controlled molecular weights and low polydispersities were synthesized by a click conjugation between alkyne‐terminated PCL‐ b…
We show how to prepare graphene samples on a glass substrate with the anodic bonding method. In this method, a graphite precursor in flake form is bonded to a glass substrate with the help of an electrostatic field and then cleaved off to leave few layer graphene on the substrate. Now that several methods are availabl…
Abstract Particle‐filled elastomers often exhibit a reduction in peak stress after the initial extension under cyclic straining, a phenomenon known as the Mullins effect. In reported literature, long rest periods and elevated temperatures are often necessary conditions to even partially restore stiffness. The stress s…