Materials Literature
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The full matrix of elastic constants of multiferroic Bi2Mn4O10 has been determined at ambient conditions using phonon spectroscopy. The dispersion of acoustic phonons in a single crystal was measured at the three axes neutron spectrometer PUMA@FRM II for different propagation directions. The magnitudes of the independ…
The gelation properties and mode of self-assembly of six asymmetrical hexaether triphenylene derivatives mono-functionalized with carboxylic and primary amine groups were investigated. The presence of a carboxylic and amine group attached to the triphenylene core generated stable, thermo- and pH-sensitive supramolecul…
The mean atomic kinetic energies of the proton, Ke(H), and of the deuteron, Ke(D), were calculated in moderate and strongly hydrogen bonded (HB) systems, such as the ferro-electric crystals of the KDP type (XH2PO4, X = K, Cs, Rb, Tl), the DKDP (XD2PO4, X = K, Cs, Rb) type, and the X3H(SO4)2 superprotonic conductors (X…
The aim of this research was to investigate the effects of wood species, particle treatments and mix proportion on the physical (density) and mechanical (compressive strength and dynamicmodulus of elasticity) properties of cement-wood composites. Different mix proportions were investigated, based on the cement: wood r…
CoFe 2 O 4 ferrite nanowire arrays are fabricated in porous silicon templates. The porous silicon templates are prepared via metal-assisted chemical etching with gold (Au) nanoparticles as the catalyst. Subsequently, CoFe 2 O 4 ferrite nanowires are successfully synthesized into porous silicon templates by the sol–gel…
The effects of high pressure on lattice stability, mechanical and thermodynamic properties of L1 2 structure Al 3 Tm and Al 3 Lu are studied by first-principles calculations within the VASP code. The phonon dispersion curves and density of phonon states are calculated by using the PHONONPY code. Our results agree well…
We investigate the fabrication of 'deformation-free' polymer/cholesteric liquid crystal (PChLC) nanocomposites by controlling the degree of phase separation in a precursor mixture containing mesogenic monomer and low molecular-weight LC molecules. Scanning electron microscopy investigations reveal that even in mixture…
We report the monolithic integration of a metal-insulator material (vanadium dioxide, VO2) for realizing a frequency tunable antenna operating around 30 GHz. The design of the device is based on a slot antenna excited by a microstrip line having a length that can be conveniently varied using a VO2-based switch. Compar…
This contribution discusses thermally stimulated current (TSC) measurements on low density polyethylene (LDPE) in the form of thin films and virtually without additives. The TSC responses are divided into different parts attributed to capacitive currents, currents due to release of trapped carriers, and normal conduct…
Although the image of discharge in the nanosecond time scale can provide some details of a single discharge, the essence of gas discharge remains random under the same macroscopic physical conditions. Therefore, the statistical evaluation of discharge images including a large number of stochastic processes in a long-t…
Abstract Owing to the atomically small thickness and moderate bandgap of MoS2, the compound is expected to be a channel material for future short-channel and low-leakage transistors. However, the high contact resistance between a metal and MoS2 is a serious issue. Although many studies have been conducted to reduce co…
The atomistic understanding of the dissociation mechanisms for large molecules adsorbed on surfaces is still a challenge in heterogeneous catalysis. This is especially true for polycyclic aromatic hydrocarbons, which represent an important class of organic compounds used to produce novel graphene-based architectures.…
Three polymethyl methacrylate based copolymers bearing arylvinylpyrimidine chromophores have been synthesized in four steps. Spectral properties of the copolymers have been studied in solution, powder and thin films and compared with the corresponding free chromophores. The copolymers exhibit strong emission solvatoch…
According to first-principles calculations, it is our prediction that bilayer phosphorene (BLP) will become a quasi-two-dimensional superconductor under a certain degree of interlayer compression. A decreasing interlayer distance may realize the transition in the BLP from a semiconducting phase to a metallic phase. On…
The results of the acoustic monitoring of the damage that accumulated in an austenitic steel sample tube during thermal pulsation are presented.
First-principles calculations have been carried out to study the structural, electric, and magnetic properties of Ni3TeO6-type A2FeMoO6 compounds (A = Sc, Lu). Their electric and magnetic properties behave like room-temperature ferrielectric and ferrimagnetic insulators where polarization comes from the un-cancelled a…
This paper reports on a transmitted-type dual-channel guided-mode resonance (GMR) sensor system that uses phase-shifting interferometry (PSI) to achieve tunable phase detection sensitivity. Five interference images are captured for the PSI phase calculation within ∼15 s by using a liquid crystal retarder and a USB web…
The UV absorption spectra of F 3 − molecular ions in LaF3, SrF2, CaF2, and BaF2 crystals doped with rare-earth elements are studied. Comparison of radiation-colored and additively colored crystals reveals the absorption bands of F 3 − hole centers in the region near 6 eV. Nonempirical calculations of optical transitio…
The surface potential behaviors of fluorinated polyimide films under low temperature were studied to clarify the effects of fluorination time and low temperature. Polyimide specimens were fluorinated in a reaction kettle at 55 °C using a F2/N2 blend with volume fraction of 80% nitrogen and 0.05 MPa for respectively 15…
Highly sensitive photodetectors based on a graphene-silicon heterojunction with interface improvements are demonstrated by X. M. Li, H. W. Zhu, Y. Fang, and co-workers on page 595. By introducing a thin, interfacial oxide layer for dark current suppression, the graphene-silicon photodetector exhibits the highest-repor…