Materials Literature
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Magnetic switching can occur under the influence of external magnetic fields and/or thermal activation. To separate the role of both effects, here we examplarily analyse an epitaxial FePt film with a mesoscopic grain size by angular and time dependent magnetization measurements. On one hand, the switching field exhibi…
Light-emitting silicon diode structures with embedded β-FeSi2 nanocrystallites have been fabricated using solid phase epitaxy and a combination of reactive deposition and solid phase epitaxy. Electroluminescence (EL) of the structures was studied over various temperatures and current densities under forward and revers…
Abstract Adding fillers to a polymer melt may result in a strain softening behavior in elongational flow in long‐chain branched materials, showing strain‐hardening behavior when compared with unfilled one. To improve the strain‐hardening properties in wood/LDPE composites, the effect of peroxide concentration on both…
In this study, we investigate the below-threshold emission characteristics of InGaN-based blue laser diodes (LDs) emitting at 442 nm to study the efficiency droop effects in InGaN LDs. From the measurement of spontaneous emission in the LD, it is observed that the peak efficiency appears at a current density of ∼20 A/…
The structure of SiGe nanocrystals embedded in Al2O3 formed by sequential deposition of Al2O3/Si/Ge/Al2O3 and a subsequent annealing was confirmed by transmission electron microscopy and energy dispersive spectroscopy (EDS), and its application for write-once-read-many-times (WORM) memory devices was explored in this…
In the 1:1 reaction of XeF(2) with 1,4-(F(2)B)(2)C(6)F(4) in 1,1,1,3,3-pentafluoropropane the insoluble zwitterion 2,3,5,6-tetrafluorophenylene-1-xenonium-4-trifluoroborate, 1-(Xe(+))C(6)F(4)-4-(BF(3)(-)), was formed as the main product (77%) along with the zwitterion, 1-(Xe(+))-cyclo-1,4-C(6)F(6)-4-(BF(3)(-)), the [B…
The study of biomaterials for gene delivery in tissue engineering and regenerative medicine is a growing area, necessitating the investigation of new biomaterials and gene delivery vectors. Poly(1,8-octanediol citrate) (POC) and poly(glycerol-sebacate) (PGS) are biodegradable, biocompatible elastomers that have tunabl…
Abstract Surface acoustic wave (SAW) filters based on Mn‐doped ZnO films have been fabricated and effects of Mn‐doping on SAW properties are investigated. It is found that the electromechanical coupling coefficient (K2) of Zn0.913Mn0.087O films is 0.73 ± 0.02%, which is 73.8% larger than that of undoped ZnO films (0.4…
Viscometry is a valid and practical approach for monitoring the degradation of polymers in solution. In this work, at constant power and pulse, the effects of different operating parameters such as time of irradiation, temperature, solution concentration, volume, solvent, and immersion depth of horn on the rate of deg…
We theoretically propose a simple model to control the charge-density flux in graphene waveguides produced by either magnetic or electrostatic barriers. We carefully study the lowest energy guided mode and find unexpected extended states for small reflected angles contributing to flux that might be related to the supe…
Temperature-responsive photo-cross-linkable poly[oligo(ethylene oxide) monomethyl ether methacrylate] (POEOMA)-based star polymers were synthesized by atom transfer radical polymerization (ATRP), for the modification of silicon (Si) wafer surfaces. The polymers showed a lower critical solution temperature (LCST) behav…
MgB 2 multifilamentary wires and tapes were fabricated by the in situ powder-in-tube (PIT) process using acetone doped milled precursor powders. The critical current density of MgB 2 is strongly enhanced by high energy milling and acetone doping. Furthermore, the liquid acetone can restrain the agglomeration of milled…
The performance of fibre-reinforced composites is strongly dependent on the nature and the strength of the fibre–matrix interface. Good interfacial bonding is required to ensure load transfer from matrix to reinforcing fibres. For rubber-reinforced composites, resorcinol formaldehyde latex (RFL) is known as a fibre su…
We investigate how MeV ions with different ion-beam parameters (ion type, electronic stopping power, and velocity) influence the formation, arrangement, and ordering quality in three types of ($\mathrm{Ge}+{\mathrm{SiO}}_{2})/{\mathrm{SiO}}_{2}$ multilayer films. The multilayers differ in total thickness, Ge-rich laye…
The thermoelectric properties of nearly lattice matched n-type InxAl1−xN (x ≈ 0.18) grown by metal organic chemical vapor deposition (MOCVD) are investigated with particular attention to the potentially conductive GaN template and InAlN/GaN interfacial polarization charges. The thermoelectric properties of InAlN are m…
When the formation volume of charged defects is evaluated by a straightforward cell minimization, the obtained ab initio formation volume is affected by a bias. Furthermore, the error does not vanish with increasing supercell sizes. The quantity to be minimized with respect to volume is not the defective supercell ene…
The assessment of the radiological risk related to the inhalation of radon and radon its progeny is based mainly on the integrated measurement of radon in both indoor and outdoor environments. The exhalation of radon from the earth's crust and building materials forms the main source of radon in the indoor environment…
A medium-range order (MRO) structure characterized by the pre-peaks in the structure factor S(Q) curves of typical glass-forming Au55Cu25Si20 melt has been detected using the high temperature x-ray diffractometer. Combining the ab initio molecular dynamics simulations and the experiments, we explore and discuss the st…
Cell microencapsulation is a promising approach for cell implantation, cell-based gene therapy, and large-scale cell culture. The well-studied α-AP (alginate-α-poly-L-lysine) microcapsules have been restricted to large-scale cell-culture and clinical applications because of high costs and cytotoxic effects in some cas…
Laser processing has a long history in the manufacturing of solar cells since most thin-film photovoltaic modules have been manufactured using laser scribing for more than thirty years. Lasers have also been used by many solar cell manufacturers for a variety of applications such as edge isolation, identification mark…