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 results of magnetization and differential scanning calorimetry measurements in the ferromagnetic shape memory alloy Ni54Fe19Ga27. This alloy undergoes an austenite–martensite phase transition in its ferromagnetic state. The nature of the ferromagnetic state, both in the austenite and the martensite phase, is…
High intensity electron emission cathodes based on carbon nanotube films have been successfully fabricated. An investigation of the explosive field emission properties of the carbon nanotube cathode in a double-pulse mode was presented and a high emission current density of 245 A cm −2 was obtained. The formation of t…
The diffraction transmission characteristics of submicrometer gratings (SMGs) designed for coupling tricolor light out of a light guide plate (LGP) are discussed. Three discrete SMGs are designed for three special wavelengths: red (700 nm), green (546.1 nm), and blue (435.8 nm). The propagation direction of the output…
Complex micro- and nano-structured materials for photonic applications are designed and fabricated using top technologies. A completely different approach to engineering systems at the sub-micron-scale consists in recognizing the nanostructures and morphologies that nature has optimized during life's history on earth.…
We report here the design and synthesis of a series of pi-conjugated fluorescent dyes with D-A-D (D, donor; A, acceptor), D-pi-D, A-pi-A, and D-pi-A for applications as the signaling motif in biological-synthetic hybrid foldamers for DNA detection. The Horner-Wadsworth-Emmons (HWE) reaction and Knoevenagel condensatio…
We report the significant enhancement of low-field magnetization and magnetoresistance (MR) in La 2/3 Ca 1/3 MnO 3 (LCMO) compounds with 5 at.% nano-MgO addition in the form of both nanoparticle and nanowire. It is found that the magnetization of the nano-MgO added compounds is highly sensitive to a low applied field…
Bulk AgPb m SbTe 2+ m compounds exhibit outstanding thermoelectric properties. It is believed that their preparation by a higher cooling rate could improve the homogeneity of these materials, and thereby one expects a certain impact on their thermoelectric properties. We have prepared AgPb 18 Sb 1− x Te 20 compounds w…
Abstract Epitaxial graphene layers grown on single‐crystal SiC have large structural coherence domains and can be easily patterned into submicron structures using standard microelectronics lithography techniques. Patterned structures show two‐dimensional electron gas properties with mobilities exceeding 3 m 2 /Vs. Mag…
Large-quantity synthesis of single-crystalline perfectly hexagonal-shaped ZnO rods has been achieved through the thermal evaporation of metallic zinc powder in the presence of oxygen without the use of metal catalyst or additives. Detailed structural analyses confirm that the structures formed exhibit a wurtzite hexag…
Hemp fiber is a strong natural fiber similar to flax, kenaf, and ramie, possessing very good fiber quality and physical properties of strength, durability, and absorbency. Hemp fiber has been increasingly used for making nonwoven composites that are ideal for the production of biobased auto interior parts. This paper…
We report on the employ of several kinds of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) dispersions as hole injection layer to increase the stability and the charge injection in organic light emitting diodes (OLEDs). The PEDOT:PSS dispersions are different for PEDOT:PSS ratios and their prope…
We have investigated the temperature and frequency dependences of the impedance components of PbTe(In) nanocrystalline films within the frequency range of $20\phantom{\rule{0.3em}{0ex}}\mathrm{Hz}--1\phantom{\rule{0.3em}{0ex}}\mathrm{MHz}$ in the temperature interval of $4.2--300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$…
Preparation and properties of Chitosan (CS)-clay nanocomposites grafted with polydimethyl siloxane (PDMS) with different clay ratios are herein discussed. CS is intercalated into sodium montmorrilonite and PDMS is grafted onto CS under UV irradiation. Sample films of CS intercalated into clay and grafted with PDMS wer…
A theoretical framework for light scattering from individual nanoscale particles or structures is developed. The main considerations distinguishing the present treatment from the theories developed for conventional light-scattering experiments are the experimental requirements for the detection of the limited light fr…
AAO membranes were detached from Al substrates via an anodic voltage pulse using aqueous HClO 4 solution without any organic reagents. Previous studies used a mixture of HClO 4 (aq) and 2,3-butanedione or methanol. However, 2,3-butanedione has a strong disagreeable odour, methanol is harmful, and the oxidized products…
A straightforward methodology for the synthesis of multifunctionalized dendrimers that is based on an orthogonal functionalization strategy has been developed. Polyamide-based dendrimers that possess both a single aldehyde and a single azide moiety on their periphery have been synthesized by using a convergent synthet…
This work investigates the transformation mechanism, at atomic level, of anatase to titanate-type structures by carrying out ab initio molecular dynamics (ab-MD) calculations with the Harris functional, including the Γ-point approximation and also several k -points. The transformation mechanism is presented and discus…
We have demonstrated the reorientation of cholesteric liquid crystal (CLC) molecules in a thick cell by acoustic streaming. In the thick cell, the initial CLC does not have a planar alignment but a focal conic state in spite of the surface being coated with a planar polyimide and rubbed unidirectionally. The acoustic…
Although the mineralogical quantitative analysis of the soil clay fraction can provide useful information for the improvement of soil management practices, the quantitation of all clay components normally requires a combination of different analytical techniques, which makes this determination expensive and time-consu…
Novel porphyrin dimer ligand and cobalt complexes by directly bridging with l-glutamic acid have been prepared and characterized. The intensities of circular dichroism and UV-vis spectra that change the aggregate morphologies of the porphyrin dimer under different temperatures have been investigated.