Materials Literature
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We have examined the formation of embedded In nanocrystals (NCs) and their influence on the free carrier concentration, resistivity, thermal conductivity, and Seebeck coefficient (S) of GaAs. The In nanocrystals enhance the free carrier concentration, while electron and phonon scattering at crystallite boundaries incr…
We report the first demonstration of optical detection by thermoelectric nanowire junctions. We employed devices composed of bismuth nanowire arrays which are capped with a transparent indium tin oxide electrode. The incident surface features very low optical reflectivity and enhanced light trapping. The unique attrib…
On page 3525, Susumu Kitagawa and co-workers demonstrate a new porous coordination polymer, in which the uniform 1D channel and open metal sites lead to excellent methane separation capability towards carbon dioxide and C2 hydrocarbons at ambient temperature. More importantly, its high water- and acid/alkaline-resista…
Based on the vector Fresnel diffraction integrals, analytical expressions for the electric and magnetic components of first-order Laguerre-Gaussian beams diffracted at a half-plane screen are derived and used to study the electric and magnetic polarization singularities in the diffraction field for both two- and three…
We theoretically clarified a principle for the highly sensitive detection of a crystalline-amorphous transition in phase-change (PC) nanoparticles by tailoring the mirror image of localized surface plasmons in the crystalline phase. The difference of back scattering (DBS) can be greatly enhanced via the strong couplin…
The paper compares low-temperature techniques for boron carbide synthesis. Boron carbide was synthesized via reaction between boric acid and various carbon precursors, e.g. phenol-formaldehyde resin, sucrose, carbon black, and potato starch. Initial compositions and carbon precursor preparation techniques were selecte…
Porous titania coatings with Ca and P elements were synthesized by plasma electrolytic oxidation (PEO). The treatment was carried out in an electrolyte containing calcium acetate monohydrate and disodium phosphate dodecahydrate ( Ca / P = 5), and 4–20 μm micropores were prepared on the coatings by applied pulse freque…
Abstract A simple, one‐step synthetic route for developing a two‐dimensional multifunctional electrocatalyst is reported, by the functionalisation of graphene using oxidised ethylenedioxythiophene (O‐EDOT). The mutually assisted redox reaction between graphene oxide (GO) and EDOT facilitates the reduction of GO to gra…
For some time our community has been concerned with interfacial spallation of protective alumina scales, not just upon immediate cooldown, but as a time-delayed phenomenon. Moisture-induced delayed spallation (MIDS) and desktop spallation (DTS) of TBC's refer to this process. It is most apparent for relatively adheren…
The unique electronic properties and high surface-to-volume ratios of single-walled carbon nanotubes (SWNT) and semiconductor nanowires (NW) make them good candidates for high sensitivity biosensors. When a charged molecule binds to such a sensor surface, it alters the carrier density in the sensor, resulting in chang…
Metal-free ring-opening oligomerization of glycidyl phenyl ether (GPE) initiated with tetra-n-butylammonium fluoride (n-Bu4NF) (5.0 mol %) was performed in the presence of poly(ethylene glycol) monomethyl ether (PEGM) (5.0, 10, 20 mol %) as a chain transfer agent, by which the resulting polymers having narrow molecula…
In this paper, a novel GaN-based dual-color LED for phosphor-free white-light generation has been demonstrated. By inserting p-type layers with different p-type doping density and thickness into active regions of dual-color GaN LEDs, we can control the ratio of output light intensities from quantum-wells near n- and p…
Mallomonas is one of the biggest genera of Chrysophyta. In total, 37 species and 2 varieties have been recorded in China. Because of their narrow ecological optimum, species of this genus are considered as valuable bioindicators. However, taxonomy of Mallomonas remains unclear. We studied the numerical taxonomy of all…
Small-scale yielding around a stationary mode I crack in a cubic single crystal is analyzed in terms of plane-strain elastically anisotropic discrete dislocation plasticity (DDP). Two symmetric crack orientations are considered with two objectives in mind. First, we study the sensitivity to materials aspects such as d…
The morphologies and structures of Ni ( OH )2–graphene hybrid materials were tailored by using different mineralizers in this work. It was revealed that the synergic effects of the highly oxidized graphene sheets and the mineralizers played a crucial role in controlling the morphology and structure of the nanocomposit…
Abstract The water‐in‐oil‐in water (W1/O/W2) double emulsion evaporation technique is widely used when the microencapsulation of soluble agents like naloxone HCl is intended. The present work shows the effect of HLB emulsifiers added to phase O on microsphere morphology, size, release, drug encapsulation efficiency. T…
The resolving power of an electron microscope is determined by the optics and the stability of the instrument. Recently, progress has been obtained towards suba ngstro m resolution at beam energies of 80 kV and below but a discrepancy between the expected and achieved instrumental information limit has been observed.…
produce electrical output in response to ambient pressures, vibrations, movements etc. In the present studies, sintering time for composition Pb0.98La0.02(NiSb)0.05[(Zr0.52Ti0.48)0.995]0.95O3 (La-PNS-PZT) was optimised to achieve properties suitable for power harvesting. Composition was processed through mixed oxide r…
Abstract Wir präsentieren einen kurzen Rückblick über die Entwicklung und Anwendung dielektrischer Elastomere. In den vergangenen zehn Jahren hat die Bedeutung dieser Polymerklasse stetig zugenommen. Inzwischen setzen sich erste Produkte auf dem Markt durch, und weitere Anwendungen stehen vor der Markteinführung.
The use of deoxyribonucleic acid (DNA) oligonucleotides has proven to be a powerful and versatile strategy to assemble nanomaterials into two (2D) and three-dimensional (3D) superlattices. With the aim of contributing to the elucidation of the factors that affect the stability of this type of superlattices, the assemb…