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 present an analytical study of the heat conduction in a quantum harmonic chain of oscillators with alternate particle masses. We find that a thermal-insulating effect already observed in some classical models consisting of chains with alternate masses also holds in the quantum version of the one-dimensional harmoni…
Commonly, metamaterials are electrically engineered systems with optimized spatial arrangement of subwavelength sized metal and dielectric components. We explore alternative methods based on use of magnetic inclusions, such as magnetic nanoparticles, which can allow permeability of a composite to be tuned from negativ…
With a novel asymmetric Schiff-base zinc complex ZnL (H2 L = N-(3-methoxysalicylidene)-N'-(5-bromo-3-methoxysalicylidene)phenylene-1,2-diamine), obtained from phenylene-1,2-diamine, 3-methoxysalicylaldehyde and 5-bromo-3-methoxysalicylaldehyde, as the precursor, a series of heterobinuclear Zn-Ln complexes [ZnLnL(NO3 )…
There are more than 2.5 million miles of oil and gas pipelines in the United States, totaling over 330 million girth welds below ground. During construction, girth welds are susceptible to the formation of various defects, one of which is hydrogen-assisted cracks. The synergistic impact of tensile stress, a susceptibl…
AIM: Remote heating of gold nanoparticles (GNPs) by low frequency electromagnetic field has been recently proposed as a potential thermal treatment for deep-seated tumors - almost all the studies were conducted on a commercial device at 13.56 MHz. This work investigates the electromagnetic heating of GNP dispersions a…
Azobenzene (di-phenyl-diazene) is well-known as a photoisomerisable molecule and has been widely studied as a molecular photoswitcher. Molecular rods, where di-phenyl arms are bound to the diazene moiety, have been also synthesized. In this article we explore by first principle density functional theory calculations t…
Abstract Three new 2D/3D supramolecular architectures derived from Cu‐organic subunits and Keggin anions, [Cu II 2 (biz) 8 (HPMo VI 10 Mo V 2 O 40 )(H 2 O) 2 ] · 2H 2 O ( 1 ), [Cu I 4 (biz) 8 (SiW 12 O 40 )] · 2H 2 O ( 2 ) and [Cu I 2 (dmbiz) 4 (Hdmbiz) 2 (SiW 12 O 40 )] ( 3 ) (biz = benzimidazole, dmbiz = 5, 6‐dimeth…
Surface modification of sisal fibers (Agave sisalana) using microwave-radiation-induced grafting and cellulase has been carried out in this paper. The modified fibers were characterized by various techniques to determine their morphology, crystallinity, and thermal stability. It has also been found that microwave-radi…
Due to significant cost and productivity advantages, low heat inputs, high welding speeds, severe loading conditions and the use of cellulosic electrodes in the construction of oil and gas pipelines are unavoidable in Australia. Another significant cost reduction directly related to the tonnage of steel pipe dictates…
Conceptual doubly lossy thin layers with high electric and magnetic conductances (HEMCs) are shown to exhibit perfect absorbing properties for a normally incident plane wave. In contrast to conventional absorbers and perfectly matched layers (PMLs), this absorber can be made infinitely thin in the limit of perfect ele…
We introduce a facile method to generate silicon nanostructures with superior anti-reflectance (AR) properties. These nanostructures possess the ideal tapered structure and aperiodic distribution required for low reflectance over a broad range of wavelengths. Consideration of effective medium theories might explain th…
In this present study, diethyl phenyl acetamide (DEPA), a multi-insect repellent, was entrapped in a hydrophilic biodegradable polymer calcium alginate to increase its efficacy. For encapsulation, an emulsion technique followed by gelation method was adopted. Various characterizations of the formed DEPA-containing alg…
In spite of current world economic climates, recognition that alternative energy sources to the traditional fossil fuels has to be explored and understood. One potential energy source being researched and developed is hydrogen gas. Currently the most economical method of transporting large quantities of hydrogen gas i…
Amorphous and crystalline TiO<sub>2</sub> and TiO<sub>2</sub>:Eu<sub>3+</sub> thin films were synthesized by the sol–gel process at room temperature. The films were spin-coated on glass substrates. The samples were calcined at 400°C, 500°C for 2h to produce crystalline films. The films were characterized using X-ray d…
The corrosion behavior of 18% Ni M250 grade maraging steel under weld-aged condition was investigated in sulfuric acid medium of different concentrations (0.1–2 M) at different temperatures (30°–60°C). Electrochemical measurements were carried out using the potentiodynamic polarization technique and electrochemical im…
An n-type organic semiconductor 2:3,5:6-bis(1,1-dicyanoethylene-2,2-dithiolate)-quinone (BDQ) has been successfully synthesised and characterised. The single crystal structure of BDQ, determined by single-crystal X-ray crystallography, indicated that BDQ is a planar molecule with strong face-to-face p-p stacking (3.40…
Polypyrrole (PPy) nanoparticles were synthesized via microemulsion polymerization technique using sodium dodecyl sulfate as surfactant. Polyvinyl alcohol (PVA) was added as soft template during polymerization to modify the structure and properties of PPy nanoparticles. The synthesized materials namely, PVA-free and PV…
We deposited NaNbO3 (NNO)-Nb2O5 (NO) self-assembled heterostructures on LaAlO3 (LAO) to form ferroelectric-semiconductor vertically integrated nanostructures. The NNO component formed as nanorods embedded in a NO matrix. X-ray diffraction confirmed epitaxial growth of both NNO and NO phases. Phase distribution was det…
Red vesuvianite crystals occur with hausmanite and calcite in a hand specimen from Långban, Sweden. Backscattered electron imaging revealed that a very few of the vesuvianite crystals exhibit cores of higher average atomic number (vesuvianite I) than the bulk (vesuvianite II). Average electron microprobe compositions…
Abstract Redox-driven ion transfer processes accompanying p-doping and undoping were investigated for poly(3,4-ethylenedioxythiophene) (PEDOT) films. The PEDOT films were potentiostatically grown from acetonitrile solutions of monomer onto the Au electrodes of 10 MHz AT-cut quartz crystal resonators. The films were th…