Materials Literature
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Amorphous carbon film/n-Si (a-C∕Si) junctions have been fabricated by direct current magnetron sputtering and their current-voltage (I-V) characteristics have been investigated. The results show that the gas pressure has a large effect on the reverse bias I-V characteristics of the junctions. For example, the reverse…
In this study, we devised an extension-induced mixer to disperse carbon nanotube (CNT) clumps into individual tubes by imposing extensional stress continuously and periodically. The rheological behavior of the CNT-dispersed suspension was investigated to examine whether the hydrodynamic dragging induces the dispersion…
Bulk Ge15Te83Si2 glass has been found to exhibit memory-type switching for 1mA current with a threshold electric field of 7.3kV∕cm. The electrical set and reset processes have been achieved with triangular and rectangular pulses, respectively, of 1mA amplitude. In situ Raman scattering studies indicate that the degree…
A quantitative assessment of c-axis oriented domains in a textured BaTiO3 (BT) single crystal has been carried out by polarized Raman microprobe spectroscopy. The relative intensity modulation of the Raman phonon modes has been theoretically modeled as a function of crystal rotation and linked to the volume fraction o…
We present magnetization and specific heat data as well as optical spectra of $\mathrm{Nd}{\mathrm{Cr}}_{3}{(\mathrm{B}{\mathrm{O}}_{3})}_{4}$ single crystals. At ${T}_{N}=8\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, the magnetic and specific heat data imply long-range antiferromagnetic spin order of the ${\mathrm{Cr}}^{3…
Superparamagnetic behaviour: CoO nanosheets synthesised by a surfactant-free wet chemical route (see high-resolution morphology image in figure), exhibit superparamagnetic features different from their bulk counterparts. No distinct antiferromagnetic transition around 300 K is observed in the nanosheets (see spectra).
Abstract Layered double hydroxides with different cations in the layers, MgAl, ZnAl and CoAl, have been prepared. The solids were obtained by the coprecipitation method and then they were submitted to the microwave radiation in order to improve the crystallinity and minimize the particle size of the solids. The sample…
The discovery of a local buckling instability of a single-walled carbon nanotube (CNT) that is subjected to point loading in its flexural direction through molecular mechanics simulations via the MATERIALS STUDIO software package is reported in the letter. The sudden decrease of the stiffness of the CNT at the onset o…
Abstract HyperMacs are long chain branched analogues of hyperbranched polymers, differing only in the sense that they have polymer chains, rather than monomers between branch points. Although the building blocks for HyperMacs and AB 2 macromonomers can be well defined in terms of molecular weight and polydispersity, t…
Hexagonal ZnO nanodisks were grown on silicon-on-insulator substrates by vapor-transport method without catalysts. The resulting nanodisks possess ultrathin thickness (10–20nm) and most of them present vertical orientation on the substrate surface. Under optical excitation, these ultrathin nanodisks exhibit ultraviole…
Using resonant Raman spectroscopy, the authors report on the alloying effect and localization of electronic states in Zn1−xMgxO (x<0.15) nanostructures with average sizes in the range of 20–150nm. Anomalous intensity enhancement of the second-order longitudinal optical phonon has been observed, which is due to Fröhlic…
Abstract Starting from calcium sulfate (gypsum) as fermentation by‐product of lactic acid production process, high performance composites have been produced by melt‐blending polylactide (PLA, L / D isomer ratio of 96:4) and β‐anhydrite II (AII) filler, that is, calcium sulfate hemihydrate previously dehydrated at 500…
This letter demonstrates the transfer and formation of aligned carbon nanotube (CNT) arrays at low temperature by imprinted conductive adhesive. A thermoplastic isotropic conductive adhesive is patterned by an imprint and heat transfer process. The CNTs grown by thermal chemical vapor deposition are then transferred t…
Higher integration density of nanoscale CMOS causes two major design challenges in SRAM-based Field Programmable Gate Array (FPGA) designs: large power dissipation (contributed by both leakage and dynamic power) and reduced reliability of operation. In this paper, we propose a hybrid design approach for SRAM-based FPG…
Erbium-doped silicon nanowires have been grown via a vapor transport and condensation method with ErCl3∙6H2O powder as part of the source in one step. The Er-doped silicon nanowires exhibit the room temperature photoluminescence at a wavelength of 1.54μm, ideal for optical communication. From I-V measurements, the res…
The torsional responses of hollow and filled carbon nanotubes under a combination of tension and torsion are examined using classical molecular dynamics simulations. The critical torsional moment and shear modulus are predicted to significantly increase as a result of coupling between tension and torsion. In particula…
Abstract In this paper, boundary methods for solving Maxwell equations are outlined with a focus on the Multiple Multipole Program (MMP) that is very advanced and well suited when high reliability and accuracy of the results is required. After the presentation of the Generalized Point Matching (GPM) technique, that is…
Abstract One of the most important problems that can arise in the development of a pharmaceutical crystallization process is the control of polymorphism, in which there exist different crystal forms for the same chemical compound. Different polymorphs can have very different properties, such as bioavailability, which…
The authors report on the 394nm UV light emission from low-temperature sputtered n-ZnO∕SiO2 thin films on top of the p-GaN heterostructure. They compare samples with and without a SiO2 current blocking layer. With a SiO2 layer, electroluminescence spectrum shows a sharp emission peak at 394nm, which is attributed to t…
The stability of photovoltage in WO3-doped (Pb0.97La0.03)(Zr0.52Ti0.48)O3 (PLWZT) ferroelectric thin films was investigated. For in-plane polarized configuration, with a greatly enhanced electrode gap, the reduction ratio of photovoltage during multicycle UV illumination was significantly smaller and stability of phot…