Materials Literature
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A novel kind of pore self‐forming macro‐/mesoporous gehlenite (2CaO·Al 2 O 3 ·SiO 2 ) ceramic (abbreviated C 2 AS) having a highest porosity of 80% corresponding to a volume expansion of 134% during sintering has been developed. The pore self‐forming ability, microstructure, mechanical, and thermal physical properties…
Si nanoclusters embedded in SiO 2 have been produced by thermal annealing in the 900–1250 °C range of SiO x films or of SiO 2 /Si/SiO 2 multilayers, both prepared by plasma enhanced chemical vapour deposition. The structural properties of these systems have been investigated by energy filtered transmission electron mi…
We study the excitation of electromagnetic surface waves in a slab of a left-handed metamaterial separating a one-dimensional periodic photonic crystal and a homogeneous dielectric medium, the so-called surface Tamm states. We show that such a layered structure can exhibit a giant lateral Goos-H\"anchen shift of the s…
The alignment and polarizability of single-wall carbon nanotubes in dilute ethanol suspensions under low-frequency, alternating-current electric fields were investigated through optical polarimetry. The nematic order parameter was determined by measuring changes in the state of polarization of a laser beam transmitted…
Piezoelectric force microscopy has been enhanced by coplanar epitaxial electrodes to detect and manipulate the striped ferroelectric domain structure of a multiferroic BiFeO3 thin film grown on single-crystalline DyScO3. Time-resolved imaging revealed ferroelastic (71° and 109°) switching of domains in a needlelike re…
We report high-pressure dynamic compression experiments of liquid water along a quasiadiabatic path leading to the ice-VII region of the phase diagram. We observe dynamic features resembling van der Waals loops and find that liquid water is compacted to a metastable state close to the ice density before the onset of c…
The thermal conductivity is calculated with the Helfand-moment method in the Lennard-Jones fluid near the triple point. The Helfand moment of thermal conductivity is here derived for molecular dynamics with periodic boundary conditions. Thermal conductivity is given by a generalized Einstein relation with this Helfand…
In this paper, ZrO 2 and WO 3 were used as the raw materials to prepare ZrO 2 /ZrW 2 O 8 composites by in situ reaction method and the thermal expansion property of the composites was studied. This novel method included a heating step up to 1473 K for 24 h, which combines the synthesizing and sintering of ZrW 2 O 8 .…
It is demonstrated that the M n +1 AX n phase Ti 3 AlC 2 may be readily synthesized by sintering a stoichiometric mixture of the lower order MAX phase Ti 2 AlC mixed with a stoichiometric amount of TiC in the temperature range 1350°–1450 °C. High‐quality Ti 3 AlC 2 was readily produced using sintering times in the ran…
N-doped and Zr–N codoped p-type ZnO films were grown on sapphire substrates by pulsed laser deposition. The carrier type and conduction are very sensitive to N2O deposition pressure. p-type conduction is observed only for films grown at an intermediate pressure range (5×10−5–5×10−4Torr). The Zr–N codoped ZnO films gro…
The synergistic effects of extracellular matrix (ECM) protein combinations on Hep3B cell proliferation and functions are studied herein. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) microspheres were covalently conjugated with three types of proteins, collagen (type I), laminin, and fibronectin, using 1-ethyl-3…
In this paper, we investigate the physical mechanism and properties of the two classes of photonic gaps in the aperiodic Thue-Morse (TM) lattice: the traditional gaps and the fractal gaps. Based on the analysis of the field distributions of the midgap and gap-edge states, we demonstrate that the two classes of gaps or…
High-angular-resolution electron energy loss spectroscopy (EELS) is used to study the anisotropic behavior of the boron and nitrogen K ionization edges in h-BN. This work makes significant progress toward improving the anisotropy measurements. The authors show experimentally by EELS the vanishment of the π* peak exist…
This letter presents a reliable and very easy method for selective growth of polarity controlled ZnO films on (0001) Al2O3 substrates by plasma-assisted molecular-beam epitaxy. Cr-compound intermediate layers are used to control the crystal polarity of ZnO films on (0001) Al2O3. ZnO films grown on rocksalt structure C…
The authors propose a new method, the Helfand-moment method, to compute the shear viscosity by equilibrium molecular dynamics in periodic systems. In this method, the shear viscosity is written as an Einstein-type relation in terms of the variance of the so-called Helfand moment. This quantity is modified in order to…
Abstract Raman scattering and surface‐enhanced Raman scattering (SERS) have been used to study the behavior of 4‐mercaptopyridine (4‐Mpy) dissolved in water and adsorbed on silver mirrors. In order to gain the actual structure and the theoretical modes of the 4‐Mpy dissolved in water and adsorbed on the surface of sil…
Hollow spheres of zinc ferrite were prepared via a surfactant‐assisted hydrothermal approach. The morphology and composition of the final products were characterized by X‐ray diffraction, transmission electron microscopy, and field emission scanning electron microscopy. It was observed from the microscope images that…
Amorphous Al 2 O 3 –MgO thin films with an Mg/Al ratio of unity were prepared on glass substrates by the sol–gel method with a heat treatment at 300°C for 30 min. By immersing the films in water containing sodium hydroxide (pH 10–13) at 100°C, nano‐crystals of Mg–Al‐layered double hydroxide (LDH) with a hexagonal stru…
Radio frequency (RF) thermal plasma treatment is studied for the size reduction and the spheroidization of coarse glass particles to change them into submicrometer‐sized powders of spherical shape. Such ultra‐fine spherical powders are the key ingredients of a sintering aid to achieve efficient package and high perfor…
Abstract A comparative evaluation of systematically tailored chemical structures of various phosphorus‐containing aminic hardeners for epoxy resins was carried out. In particular, the effect of the oxidation state of the phosphorus in the hardener molecule on the curing behavior, the mechanical, thermomechanical, and…