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。
The effect of a N2 impurity on the radial thermal expansion coefficient (ar) of single-walled carbon nanotube bundles has been investigated in the temperature interval 2.2 - 43 K by the dilatometric method. Saturation of nanotube bundles with N2 caused a sharp increase in the positive magnitudes of ar in the whole ran…
Cocaine cracked: The gel–sol transition of an enzyme-caged hydrogel has been efficiently controlled by target binding events, which trigger release of the enzyme to take part in its catalytic role for signal amplification (see picture). As low as 20 ng of cocaine can be visually detected within 10 min without any aid…
Large-sized chemical vapor deposited graphene films configured as solution-gated transistors can label-freely and electrically detect DNA hybridization with single-base specificity. The gate voltage which gives the minimum device conductance (Vg,min) is sensitive to the charge transfer between DNA molecules and graphe…
A jute woven fabric employing leno based construction was designed for developing an asphalt overlay fabric, suitable for low traffic roads. To assess the suitability of this product, pavement models embedded with this fabric were subjected to accelerated cyclic mechanical loading and also to extended hygral loading.…
This chapter contains sections titled: Introduction Spectra and Excited States Photoreduction Photoaddition Photosubstitution Unimolecular Photoreaction of Quinones Photochemistry of Quinone Related Compounds
This chapter contains sections titled: Introduction Spectra and Excited States Cycloaddition Reactions Addition to Benzene Reactions Involving Abstraction of Hydrogen from Substrates Miscellaneous Systems Reactions Involving Substituents 4,4′-Diphenoquinones Quinone Methides and Quinone Imines References
Abstract Nanosized CaAlSiN3:Eu2+ red phosphor was synthesized by solid-state reaction using CaH2 as calcium source. The obtained phosphor was well crystallized and the particle size was about 200–400 nm. It showed a broad excitation band originating from the 4f7 → 4f65d transition of Eu2+ ion extending to 600 nm and c…
Bioreactor cultures of Escherichia coli recombinants carrying phaBAC and phaP of Azotobacter sp. FA8 grown on glycerol under low-agitation conditions accumulated more poly(3-hydroxybutyrate) (PHB) and ethanol than at high agitation, while in glucose cultures, low agitation led to a decrease in PHB formation. Cells pro…
The scalar $f_{xc}$ and tensor $\hat{f}_{xc}$ exchange-correlation (xc) kernels are key ingredients of the time-dependent density functional theory and the time-dependent current density functional theory, respectively. We derive a comparatively simple relation between these two kernels under the assumption that the d…
Mechanical anomalies (damping peaks sharper than Debye peaks, in contrast to a broad relaxation peak) were observed in tetragonal barium titanate ceramic via broadband viscoelastic spectroscopy at low frequencies (<10 Hz) at ambient temperature after aging at 90 °C for 15 h. The sharp peaks disappear after agin…
Polycrystalline PrCuMn6O12 sample has been successfully synthesized. It has been characterized by x-ray diffraction (XRD), magnetic and magnetotransport measurements at ambient pressure, and transport property measurements under pressures. From the refinements of XRD data, a cubic phase and a trigonal phase with charg…
The magnetoresistance and magnetocaloric properties of the Pr 0.1 Gd 0.9 Mn 2 Ge 2 compound have been investigated by resistance and magnetization measurements. This compound shows ferrimagnetism, antiferromagnetism, ferromagnetism, antiferromagnetism and paramagnetism with increasing temperature. The metamagnetic tra…
The multiphonon-assisted photoluminescence (PL) of the single wall carbon nanotubes (SWNTs) have been studied by solving the Schrödinger equation, showing a set of phonon sidebands, both the Stokes and anti-Stokes lines, which are induced by the longitudinal optical phonon and radial breathing mode phonon. All the cal…
We present a new method for in situ monitoring of a grating profile during the development process to control the critical dimensions of surface-relief rectangular photoresist gratings on transparent substrates. A He-Ne laser of visible wavelength is employed as the monitoring light source. We determine the height of…
Ge 1 − x Mn x / Ge single-crystal heterojunction diodes with p-type Ge1−xMnx ferromagnetic semiconductor were grown, respectively on Ge substrates of p-type, n-type, and intrinsic semiconductors by molecular beam epitaxy. The I-V curve of the p-Ge0.95Mn0.05/intrinsic-Ge diode can be greatly tuned by a magnetic field,…
We demonstrated that the timescale for Si quantum dot (Si-QD) formation in a SiOxNy layer is a few milliseconds by IR laser irradiation. The amount of Si agglomerated into QD in a laser irradiated SiOxNy layer is comparable to that calculated after furnace annealing at 1250 °C for 30 min. However, we found that crysta…
A simple, effective, and innovative approach based on ion-assisted self-organization is proposed to synthesize size-selected Si quantum dots (QDs) on SiC substrates at low substrate temperatures. Using hybrid numerical simulations, the formation of Si QDs through a self-organization approach is investigated by taking…
Abstract We report a systematic study of the synthesis of multiwall carbon nanotubes (MWCNTs) by arc‐discharge in liquid nitrogen (LN 2 ). The effect of the variation of the experimental parameters, such as size of electrodes and discharge current, on the formation of nanostructures has been investigated by scanning e…
Abstract A new near α‐titanium alloy Ti12.5Zr2.5Nb2.5Ta (TZNT) for surgical implants was designed. The potentiodynamic technique was performed to investigate the corrosion behaviors of TZNT in Ringer’s solution, and Ti6Al4V, Ti6Al7Nb, and TA2 were taken as comparison. The structure of the passive film was analyzed usi…
An Anodic porous alumina mask with a checkerboard pattern was by forming of square cells and subsequently opening the bottom part of the cells by etching. The anodization of Al with a pretextured pattern, which was formed by imprinting using a mold with alternating defects in the array of convexes in a square lattice,…