Materials Literature
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We discus existent conflicts between experimentally measured and theoretically calculated melting curves of Mo, Ta, and W. By assuming that vacancy formation plays a fundamental role in the melting process, an explanation for the measured melting curves is provided. Furthermore, we show that the Lindemann law fits wel…
Recently it has been suggested that the complicated temperature dependence of the extraordinary Hall effect (EHE) in the itinerant ferromagnet SrRuO3 could be explained by the Berry phase effect in the crystal momentum space. We test this model by measurements of EHE as a function of an applied magnetic field at a con…
The interlayer binding energy of graphite is obtained by a semiempirical method in which ab initio calculations based on the density functional theory (DFT) are supplemented with an empirical van der Waals (vdW) interaction. The local density approximation (LDA) and generalized gradient approximation (GGA) are used in…
Decades of experimental and theoretical studies have brought some useful insights about what defines resistance to amorphization by radiation damage; however, the problem is still viewed as generally unsolved. I review ideas and concepts that have been put forward to help with understanding this problem. I then discus…
Recent work on the dynamics of monolayers on a metallic substrate attached to a quartz oscillator has provided interesting data on kinetic friction at the microscopic level. Sliding of the film relative to the substrate is often observed even in situations in which theory seems to predict that the film should be pinne…
Superconductivity of boron-doped diamond, reported recently at ${T}_{c}=4\text{ }\mathrm{K}$, is investigated exploiting its electronic and vibrational analogies to ${\mathrm{M}\mathrm{g}\mathrm{B}}_{2}$. The deformation potential of the hole states arising from the C-C bond-stretch mode is 60% larger than the corresp…
We substantiate by calculations that the recently discovered superconductivity below 4 K in 3% boron-doped diamond is caused by electron-phonon coupling of the same type as in MgB$_2$, albeit in 3 dimensions. Holes at the top of the zone-centered, degenerate $σ$-bonding valence band couple strongly to the optical bond…
Abstract An overview is presented of the literature on the thermal decomposition and combustion of thermoplastic polyesters, especially commercially important poly(ethylene terephthalate) (PET) and poly(1,4‐butylene terephthalate) (PBT). Although the literature is not clear as to whether heterolytic or homolytic sciss…
Cellulosic biomass includes agricultural (e.g., corn stover and sugarcane bagasse) and forestry (e.g., sawdust, thin-nings, andmill wastes) residues, portions ofmunicipal solid waste (e.g., waste paper), and herbaceous (e.g., switch-
Based on the theory of nonlocal continuum mechanics, a multiple shell model is developed for the axial buckling of multiwalled carbon nanotubes under axial compression. The effects of small length scale are incorporated in this model. In particular, an explicit expression is derived for the axial buckling strain for a…
Confining water in lab synthesized nanoporous silica matrices MCM-41-S with pore diameters of 18 and 14 A, we have been able to study the molecular dynamics of water in deeply supercooled states, down to 200 K. Using quasielastic neutron scattering and analyzing the data with the relaxing cage model, we determined the…
To present day, the maximum magnetocaloric effect (MCE) at room temperature for a magnetic field change of 5 T is $40\text{ }\text{ }\mathrm{J}/(\mathrm{k}\mathrm{g}\text{ }\mathrm{K})$ for MnAs. In this Letter we present colossal MCE measurements on MnAs under pressure, reaching values up to $267\text{ }\text{ }\math…
We analyze an S-shaped inclusion for the realization of metamaterials exhibiting left-handed properties. Unlike most of the conventional inclusions used so far that are composed of two separate geometries-typically a split ring and a rod-the inclusion proposed in this paper is made of only one S-shaped element which y…
Nanostructures, such as nanowires, nanotubes and nanocoils, can be described in many cases as quasi one-dimensional curved objects projecting in three-dimensional space. A parallax method to construct the correct three-dimensional geometry of such one-dimensional nanostructures is presented. A series of scanning elect…
Time-resolved scanning Kelvin probe microscopy (SKPM) and Raman microscopy have been used to investigate processes occurring at the interface between indium tin oxide (ITO) electrodes and inkjet printed polyethylenedioxythiophene: polystyrene sulphonic acid (PEDOT:PSS). SKPM reveals a slow, reversible polarisation pro…
Two important processes in ferromagnetic resonance are the first-order absorption of a photon and creation of a single magnon, and a second-order process in which the absorption of a photon results in the creation of two magnons of equal and opposite wave vector [M. Sparks, Ferromagnetic Relaxation (McGraw–Hill, New Y…
This study investigated the variations in the dielectric constant with film thickness and measurement temperature of (Ba0.48Sr0.52)TiO3 thin-film capacitors with thicknesses ranging from 65 to 273 nm. The films were prepared by an on-axis rf magnetron sputtering, having Pt top and bottom electrodes. The thicker film s…
Using first-principles total-energy and dynamic phonon calculations, we study the structural transformation to and stability of cubic ${\mathrm{BC}}_{2}\mathrm{N}$ phases under pressure. We show that different starting material forms lead to distinct synthesis routes, yielding end products with drastically different p…
Abstract Extrusion coating was used to obtain montmorillonite/polyethylene‐coated paperboard. The coating was prepared from a master batch containing maleated polyethylene, low‐density polyethylene and 32 wt.% polyvinylpyrrolidone‐surface‐modified montmorillonite clay, which was blended with different amounts of low‐d…
Belt-like ZnS with visible photoluminescence was synthesized rapidly with Zn and S in the vapor phase.