Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We report on AlGaN grating reflectors for short-wavelength applications, an alternative to conventional distributed Bragg reflectors that are difficult to make in a GaN-based system. An array of air-bridge AlGaN grating reflectors, with a period and filling factor of 430 nm and 0.55, was fabricated through holographic…
Abstract An improvement to a previously published suspension polymerization process for the production of spherical core/shell PVAc/PVA particles is described. To increase the settling time of the beads in the suspension, an expansion stage was introduced. The core/shell structure was obtained through the partial hydr…
We investigated the structural and infrared spectral properties of porous polycrystalline 3C-SiC and 3C-SiC nanoparticles produced via electrochemical method. The porous sample consisted of parallel nanowires with periodic beadlike structures. It exhibited infrared spectral features quite different from that of single…
A SiO2/SiOx/SiO2 strip-loaded waveguide with buried Si quantum dots is optically pumped to provide amplified spontaneous emission centered at 805 nm with spectral linewidth of 140 nm. By top-pumping the 350-nm-thick SiOx with He–Cd laser of 40 mW at 325 nm, the optical gain of 65 cm−1 and loss coefficient of 5 cm−1 ar…
We discuss the measurable structure factor S(M)(q) of highly concentrated nanoemulsions in a glassy amorphous state. Neutron scattering data show that the primary structure factor peak decreases with increasing concentration and eventually drops below unity. We find very good quantitative agreement between the experim…
We fabricated point emitters using a multiwalled carbon nanotube (MWCNT) yarn which was treated by ethylene glycol. The point emitter showed a very high emission current of 3.01 mA (current density of 1.1 x 10(8) A cm(-2)) and good emission stability of over 20 h. We attributed the excellent field emission properties…
The feasibility of the use of compressed carbon dioxide (CO 2 ) as a solvent for the coating of titanium dioxide (TiO 2 ) nanoparticles with octyltriethoxysilane was tested in this work. These studies were focused on investigating the influence of the pressure, temperature, and reaction time on the process kinetics as…
Abstract Herein, we systematically investigate the structural, electronic, and vibrational properties of ammonia borane (NH 3 BH 3 , AB) and lithium amidoborane (LiNH 2 BH 3, LAB) through both density functional calculations and experiments. AB and LAB samples are generated and their vibrational spectra are obtained b…
Silver nanoparticles of small average diameter (<5 nm) and rather narrow size distribution rapidly formed on the surfaces of carbon nanotubes in a simple mechanochemical process in which silver acetate was ball-milled with the nanotubes for only a few minutes. The outcome was achieved in the absence of any solvent, an…
A methodology for synthesizing different sized gold nanorods and ordering them into a two-dimensional array at a water/hexane interface without a linker-molecule is reported. The resulting nanorod film was transferred to a solid substrate repeatedly, allowing for systematic control of the nanorod film thickness. An in…
Stable p-type Sb-doped ZnO (ZnO:Sb) was fabricated reproducibly by sintering mixture of ZnO and Sb2O3 powders under 5 GPa at temperatures of 1100–1450 °C. The best p-type ZnO:Sb with resistivity of 1.6×10−2 Ω cm, carrier concentration of 3.3×1020 cm−3, and mobility of 12.1 cm/V s was obtained by doping 4.6 at. % Sb an…
Phosphole oxides exert the ability to detect explosives, especially nitroaromatic explosives such as 2,4,6-trinitrotoluene (TNT), by fluorescence quenching. In the image sensing of explosives sprayed with phosphole oxide, fluorescence quenching permits the visual determination of the lower detection limits of the nitr…
Abstract Diamond‐like carbon (DLC) coatings are currently being used in a wide variety of industrial fields because of their outstanding properties, such as high hardness and low friction coefficient, among others. DLC coatings have various characteristics depending on the deposition method used. However, they have a…
Atomistic simulations were performed to investigate the pseudoelastic effects induced by martensitic phase transformation from body-centered cubic (B2) to body-centered tetragonal (BCT) lattice in Cu–Zr nanowires. The phase transformation occurs through nucleation and propagation of {100} twin boundary, which differs…
Using an aberration-corrected transmission electron microscope, we report on imaging individual atomic columns of Li in the intermetallic compound ${\text{Al}}_{3}\text{Li}$. The effect of electron energy on the imaging characteristic of Li is investigated by performing measurements at 80 kV employing a monochromated…
First-principles density-functional theory calculations have been performed on the atomistic structure, electronic structure, and distribution of antisite defects (AD) in yttrium aluminum garnet (YAG) ${\text{Y}}_{3}{\text{Al}}_{5}{\text{O}}_{12}$. The formations of one and two antisite defects per unit cell are endot…
Surface-bound fluorescence assays such as microarrays have emerged as a prominent technology in current life sciences research and are currently performed on optically passive substrates such as glass microscope slides. We present an alternative approach using photonic crystal substrates exhibiting resonant reflection…
Ferrocenylmethyl methacrylate (FMMA) is one of the very few metallocene-based monomers that are promising candidates for truly living anionic polymerization. Nevertheless, FMMA homopolymers with a narrow polydispersity, or block copolymerization studies that result in satisfying blocking efficiencies, are unknown so f…
The adsorption of myoglobin (Mb) onto nanosized nickel aluminum hydrotalcite (NiAl-HTlc) surface was studied, and the structural properties of the resulting protein layer were analyzed by using FT-IR, Raman, and fluorescence spectroscopies. Upon adsorption onto the nanoparticle surface, the protein molecules maintaine…
Abstract The one‐pot synthesis and properties of multifunctional hybrid mesoporous organosilica fibers with helical shapes are described. These hybrid mesoporous fibers are prepared without chiral elements and functionalized with a large variety of organic R functions (R = alkylthiols, phenylsulfonates, alkylphosphona…