Materials Literature
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We report the neutral-ionic transformation of ${\mathrm{N}}_{2}∕{\mathrm{O}}_{2}$ mixtures above $5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ at $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The reaction is photoinduced with a Nd:YAG laser irradiation. The ionic compounds are characterized by Raman and infrared spectrosco…
Magnetic anisotropy field of (110) Fe∕Co superlattices was found to be as high as 1T, with an in-plane easy axis. First principles calculations within the local spin density approximation show good agreement with the measurement. Lowering the symmetry by creating artificial superlattice structures leads to a significa…
The electronic and magnetic properties of Ag-doped Fe3O4 films were studied by x-ray absorption near-edge structure (XANES), extended x-ray absorption fine structure (EXAFS), and x-ray magnetic circular dichroism (XMCD) measurements. A comparison between the Ag K-edge EXAFS Fourier transform spectra of Ag-doped Fe3O4…
Porous Si with perfect long range order (mm2 scale) was obtained using an integrated mask of ordered anodic aluminum oxide (AAO). This represents an increase of many orders of magnitude in the ordered domain size compared with porous Si made with self-assembled AAO masks. Here, master stamps composed of silicon nitrid…
The authors studied the thermoelectric properties of LaPdSb and GdPdSb. The values of the thermoelectric power were positive and relatively large (60–100μV∕K). The values of the electrical resistivity were on the order of 10−4Ωcm, which is unexpectedly low in view of the large values observed for the thermoelectric po…
The authors use Pickering emulsions as a model system to investigate the dynamics of charged microparticles at polydimethylsiloxane (oil)-water interfaces using confocal laser scanning microscopy. More importantly, they have explored the potential of developing one-particle microrheology at liquid-liquid interfaces. T…
Nanocrystalline diamond films have been deposited on silicon nitride substrates by hot filament chemical vapor deposition. Gas mixtures of CH4–H2–Ar were used with variation of the Ar∕H2 ratio in order to study the influence of the Ar content on the formation of nondiamond phases at the grain boundaries and thus in th…
Honeycomblike network of vertically aligned AlN nanoplatelets was synthesized on etched Si substrate via a simple vapor phase method without catalyst. The nanoplatelets are hexagonal wurtzite AlN and their thickness is 10–100nm. Field emission (FE) measurements showed that this nanostructure has a low turn-on field of…
Thin films of scandium oxide were epitaxially deposited on GaN via molecular beam epitaxy using elemental Sc and an oxygen plasma. After growth, the Sc2O3 films were annealed at a temperature of 800°C for 5min in the growth chamber. The structural quality of Sc2O3 films, before and after annealing, was characterized u…
The results pertaining to luminescence enhancement due to high-temperature amalgamation of nanometer-sized silica powder and the oxide mixture of calcium, zinc, titanium, and praseodymium are presented. The (Ca,Zn)TiO3:Pr3+ phosphor showed an intense and narrow band emission at ∼614nm under ambient light/ultraviolet e…
The electronic transport properties of Cs-encapsulated single-walled carbon nanotubes (Cs@SWNTs), which are created by a plasma ion irradiation method, are experimentally investigated at both room and low temperatures by fabricating field-effect transistor devices with these modified SWNTs. It is found that Cs@SWNTs e…
The authors report surface charge retention and enhanced ferroelectric polarization effect on ferroelectric thin films by Kelvin probe force microscope (KFM). Since high electric field is induced at scanning probe microscope tip during domain switching and the sign of surface charge induced by this high electric field…
Abstract Ruthenium nanoparticles have been prepared by hydrogenation of the complex Ru(COD)(COT) (COD = 1,5‐cyclooctadiene, COT = 1,3,5‐cyclooctatriene) in the presence of i) heavily fluorinated solid compounds as stabilizers ( para ‐bis(perfluorooctyl)benzene, 2,4,6‐tris(perfluorooctyl)aniline, and the non‐functional…
The suspense of dispersion! Nanoparticle clusters with a hydrolyzable interparticle barrier have been synthesized. These clusters are able to disperse into a stable colloid at a rate dependent upon the pH of the surrounding solution (see figure). This method could enable novel applications for colloidal clusters paire…
Electronic transport properties of Cs-encapsulated double-walled carbon nanotubes (DWNTs) synthesized via a plasma irradiation method are investigated by fabricating them as field-effect transistor devices. The authors’ results indicate that Cs-encapsulated DWNTs exhibit a high performance n-type characteristic in con…
An electron emitter composed of discontinuous gold-carbon compound conducting film on etched porous aluminum oxide (PAO) layer is proposed in this letter. The PAO layer is located between two 30μm spaced cathode and grid electrode, and is etched in diluted phosphoric acid to introduce roughness on the soda lime glass…
Heteroepitaxy of strained Mg0.37Zn0.63O layers on ZnO (0001) substrates introduces a transition from two-dimensional to Stranski-Krastanov growth accompanying lattice relaxation at a critical thickness, as indicated by the nanodots formation on the growing planar layer. Due to differences in the atomic size of Mg and…
ZnTe and Cr doped ZnTe crystals have been synthesized using a solvothermal process. The characterizations by x-ray diffraction and transmission electron microscopy show that the synthesized ZnTe:Cr crystals have a cubic structure and Cr is incorporated into ZnTe. The magnetic properties of ZnTe:Cr are investigated. A…
Abstract Summary: It is well known that poly(propylene)/clay (PP/clay) nanocomposite forms an exfoliated structure when mixed with maleic anhydride‐functionalized polypropylene (MAPP). This can be easily achieved by melt processing, however, the use of functionalized chemicals like MAPP costs a lot preventing its comm…
Enhanced electroluminescence (EL) of ITO∕SiOx∕Si-nanopyramid/p-Si∕Al diode is investigated. By using low-power plasma enhanced chemical vapor deposition at high substrate temperature, anomalous (100)-oriented Si nanopyramids with a surface density of 1.6×1010cm−2 are synthesized at SiOx∕Si interface prior to grow Si-r…