Materials Literature
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Results of the experimental studies of resistivity, specific heat, and magnetocaloric effect in lanthanum deficient manganite of La0.8Ag0.1MnO3 are presented. The influence of isotopic substitution of oxygen 16О → 18О on the resistivity, specific heat, and magnetocaloric effect in La0.8Ag0.1MnO3 is estimated. The magn…
In this paper, the bamboo flour (BF) reinforced polypropylene (PP) composites were studied with special attention to morphology of the composites and the effectiveness of chemically modified fillers to improve their mechanical properties. The composites of polypropylene with neat bamboo flour (BF) and treated bamboo f…
The ability to modify the surface of materials with functional and responsive coatings is a powerful tool for the fabrication of smart devices for biotechnology, microfluidics, membrane technology, sensors and drug delivery systems. A recently developed method for the deposition of polymeric thin films, called initiat…
The recently emergent field of Nanotechnology involves the production and use of structures at the nanoscale. Research at atomic, molecular or macromolecular levels, has led to new materials, systems and structures on a scale consisting of particles less than 100 nm and showing unique and unusual physical, chemical an…
Abstract The thermal diffusivities of ZrB 2 –SiC (10.7, 21.9, or 48.7 vol% SiC) with B 4 C sintering aid were measured over 25–2000 °C using laser flash. The composition with the highest SiC showed the highest thermal conductivity ( k ) at 25 °C, but the lowest above ≈400 °C, because of the greater k temperature sensi…
In the present investigation, the goal was the preparation, characterization, and surface morphology of poly(amide-imide)/TiO 2 /oganoclay nanocomposites. At first, an optically active poly(amide-imide) was synthesized from the polymerization reaction of N-trimellitylimido-l-isoleucine diacid with 4,4′-methylenebis(3-…
In this study, the influence of fiber composition and process parameters such as mass per unit area and punching density on abrasion resistance of polyester-/viscose-blended needle-punched nonwovens has been investigated. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapp…
We investigate the luminescence of Si supersaturated with S (Si:S) using depth-resolved cathodoluminescence spectroscopy and secondary ion mass spectroscopy as the S concentration is varied over 2 orders of magnitude (1018–1020 cm−3). In single-crystalline supersaturated Si:S, we identify strong luminescence from intr…
We implemented graphene network on indium tin oxide (ITO) nanodots to a transparent and current-spreading electrode in InGaN-based solar cell to improve power conversion efficiency. The external quantum efficiency and short circuit current density (Jsc) of solar cells with graphene network on ITO nanodots were enhance…
Here, biosynthesis of silver nanoparticles (AgNPs) in a continuous stirred tank with C. Platycladi extract serving as both reducing and capping agents was investigated, which for the first time provided a successful green protocol for synthesis of AgNPs in a continuous stirred tank. Residence time distributions (RTDs)…
The efficiency of graphene-based composites relies on mechanical stability and cooperativity, whereby separation of layers (i.e., delamination) can severely hinder performance. Here we study buckling induced delamination of mono- and bilayer graphene-based composites, utilizing a hybrid full atomistic and coarse-grain…
Abstract A mathematical model is developed for condensation polymerization of 1,3‐propanediol to produce Cerenol polyether. The effect of the super‐acid catalyst is considered explicitly in the proposed reaction mechanism. The main reactions include protonation/deprotonation equilibrium, polycondensation, carbocation…
The integration of discrete metal complexes has been attracting significant interest due to the potential of these materials for soft metal-metal interactions and supramolecular assembly. Additionally, block copolypeptide amphiphiles have been investigated concerning their capacity for self-assembly into structures su…
Sm0.5Sr0.5MnO3 thin films were deposited by DC magnetron sputtering on LaAlO3 (LAO) and SrTiO3 (STO) substrates. The film on LAO, which is under compressive strain, undergoes paramagnetic-ferromagnetic (PM-FM) transition at T-C similar to 116K and shows insulator-metal transition (IMT) at T-IM similar to 115 K. The fi…
We studied the control of the bandgap energy of graphene by doping manganese oxide nanoparticles using an electrochemical method. The manganese oxide doping into the graphene was a main role for the bandgap opening and the defect generation was an effective method to increase the density of Mn doping on the graphene.…
Field emission of reduced graphene oxide coated on polystyrene film is studied in both parallel and perpendicular configurations. Low turn-on field of 0.6 V/μm and high emission current density of 200 mA/cm2 are observed in perpendicular configuration (along the cross section), whereas a turn-on field of 6 V/μm and cu…
To achieve large figure of merit (ZT) and superior thermal durability at high temperatures, we have investigated thermoelectric properties of molten Bi2Te3, CuI, and AgI up to 1173 K. Molten Bi2Te3 was found to have large electrical conductivity between 1800 and 2000 (Ω ⋅ cm)−1. Molten CuI and AgI, however, exhibited…
Oberflächenfunktionalisierung: Die vollständige Detoxifizierung von Goldnanostäben wurde durch Veränderung der Konzentrationen von auf der Oberfläche absorbiertem Polyethyenglycol und destabilisierendem Ethanol erreicht (siehe Bild). Diese robuste Methode ergänzt Untersuchungen zum Einfluss der Form auf die Nanopartik…
Abstract Two kinds of monomers containing thioether units 4,6‐bis(4‐chloroformylphenylthio)pyrimidine ( BPPM‐DC ) and 3,6‐bis(4‐chloroformylphenylthio)pyridazine ( BPPD‐DC ) were synthesized by two steps and were reacted with diamine‐containing thioether (−S–) and sulfone units to prepare a kind of polyamide containin…
The formation of the half monolayer (ML) Sr Zintl template layer on Si(001) is investigated in a combined experimental and theoretical work consisting of in situ reflection high energy electron diffraction, in situ x-ray photoelectron spectroscopy (XPS), and density functional theory. Starting with clean 2 × 1 reconst…