Materials Literature
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Polymeric luminophors with reduced toxicity are of the priorities in the production of lighting devices, sensors, detectors, bioassays or diagnostic systems. The aim of this study was to develop a method of immobilization of the new luminophor on a surface of nanoparticles and investigation of the structure of the gra…
In this paper, we report a new strategy for controlled cargo release using quercetin-conjugated alginate (Alg) hydrogels that has enhanced hydrogel stability and can release cargo molecules through on-demand metal cation reduction by a biological reducing agent, ascorbate. By conjugating hydrophobic quercetin to the A…
This study investigated the correlation between surface composition and peeling resistance in food packaging films by studying the heat aging of fabricated films over varying periods of time. The films consisted of a layer of aluminum (Al) metallized, biaxially oriented polypropylene (BOPP) bonded with a polyurethane…
The brazeability of automotive zinc-coated steels depends on several factors. These include the morphology of the joint and the welding parameters selected. However, more fundamental material factors such as the composition of the coating, method of coating and coating thickness also have a significant effect. In this…
Structure and dynamics of liquid aluminosilicate (Al2O3–2SiO2, abbreviated as AS2) are investigated by molecular dynamics (MD) simulation and visualisation. The local structural characteristics are analysed via topology statistics of basic structural units TOn and OTm (T = Si, Al; n = 3, 4, 5, 6; m = 2, 3, 4, 5). The…
To determine the hydrogen-embrittlement resistance of anchor rods in the new San Francisco-Oakland Bay Bridge, tensile tests of full-size ASTM A354 Grade BD anchor rods were conducted at very slow load rates. Resistance to embrittlement by hydrogen entering the rods while under load, also referred to as stress corrosi…
The main objective of this paper was to assess three leaded brass samples (pending application with Copper Development Association) using optical microscopy and mass spectrometry to compare the distribution of lead. Based on the mass spectrometry data, a great deal of variation was not found within each of the samples…
Ultraviolet sensors based on homoepitaxially grown ZnO nanorods were fabricated using clean room technology. We study the spectral dependence and frequency dependence of the photoresponse of these rods at different temperatures and ambient conditions. Whereas the response for above-bandgap light is fast, we find a slo…
Multiphoton near-IR downconversion quantum cutting luminescence of Er3+-ion-doped tellurium glass is studied. We find that the excitation spectra of 1532.0 nm IR light and 550.0 nm visible light are very similar in wave shape and peak wavelength. When the concentration of Er3+ ions is increased from 0.5% to 3.2%, we o…
We study the effect of the Rashba spin-orbit interaction in the quantum transport of carbon nanotubes with arbitrary chiralities. For certain spin directions, we find a strong spin-polarized electrical current that depends on the diameter of the tube, the length of the Rashba region, and on the tube chirality. Predict…
Extended x-ray absorption fine structure (EXAFS) spectroscopy combined with reverse Monte Carlo (RMC) and evolutionary algorithm (EA) modelling is used to advance the understanding of the local structure and lattice dynamics of copper nitride (Cu 3 N). The RMC/EA-EXAFS method provides a possibility to probe correlatio…
The local structure of ${\mathrm{IrTe}}_{2}$ has been studied by iridium ${L}_{3}$-edge x-ray absorption spectroscopy (XAS) measurements as a function of pressure, performed at two temperatures (100 and 295 K) across the structural phase transition at $\ensuremath{\sim}270$ K. Extended x-ray absorption fine structure…
Photomultiplication-type ultraviolet (UV)/visible photodetectors (PDs) are demonstrated in an electrodeposited Cu2O/C60 hybrid structure. These simple organic/inorganic hybrid PDs exhibit external quantum efficiencies (EQEs) of 1.1 × 104% under illumination of 365 nm UV light at −3 V, indicating a large gain of photoc…
Broadband optical antireflective arrays of sub-wavelength structures were fabricated on silicon substrates using colloidal nanosphere lithography in conjunction with reactive ion etching. The morphology of the nanostructures, including the shape, base diameter and height, was precisely controlled by modifying the conv…
Organic rodlike cellulose nanocrystals extracted from sisal fibers and inorganic montmorillonite based on silicate layers were employed to develop bionanocomposites based on gelatin matrix. Bionanocomposites with cellulose na... | Find, read and cite all the research you need on Tech Science Press
Individual heteroatoms in nanoscale materials often play a pivotal role in materials properties. To obtain maximum control over materials properties, researchers must be able to detect and identify diverse heteroatoms in samples with varying thickness and composition. Here, we demonstrate the identification of individ…
In this paper, the authors discuss the use of Fourier transform infrared absorption spectroscopy to monitor the hydrogen surface coverage of silicon nanoparticles suspended in an argon-hydrogen nonthermal plasma. The absorption from surface silicon hydride groups is measured by growing nanoparticles from silane in a f…
We present results on the rates of interlayer energy transfer between excitons in monolayers of two-dimensional group-VI transition metal dichalcogenides (TMDs). We consider both radiative (mediated by real photons) and nonradiative (mediated by virtual photons) mechanisms of energy transfer using a unified Green's fu…
The present study involves the synthesis of polyaniline (PANI) and its composite with nickel bis(acetylacetonate) complex (Ni(acac) 2 ) via chemical oxidative polymerization method. PANI-Ni(acac) 2 composite was characterized by energy dispersive X-rays (EDX), fourier transformer infrared spectroscopy (FTIR), X-ray di…
Abstract Magnetic and conventional shape memory properties of Mn 49 Ni 42 Sn 9 (at.%) and Mn 49 Ni 39 Sn 9 Fe 3 (at.%) polycrystalline alloys exhibiting martensitic transformation from ferromagnetic austenite into weakly magnetic martensite are characterized under compressive stress and magnetic field. Magnetization d…