Materials Literature
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We have designed ultra-thin graphene microwave transistors by using pre-patterned metal or graphene nanoribbon back-gates and hexagonal boron nitride as a dielectric substrate. Despite the inhomogeneities induced by the graphene transfer process, we show that it is possible to operate these types of devices across a b…
The mechanical properties and failure mechanisms of the β-Si3N4 thin layers in basal plane under uniaxial tension are investigated by using molecular dynamics simulations. It is found that the thin layers display a nonlinear stress-strain relationship first at ε < 0.06, and then a linear response at 0.06 &l…
Abstract Bulk composites for the production of green‐machinable, complex‐shaped ceramic parts with tailorable properties for applications under mechanical stress are fabricated by a novel combination of a poly(vinyl)silazane‐derived ceramic matrix with Al 2 O 3 or ZrO 2 fillers. Green‐machinable composites were produc…
This work describes the first hydrothermal synthesis in fluoride medium of Ni-Al montmorillonite-like phyllosilicates, in which the only metallic elements in the octahedral sheet are Ni and Al. X-ray diffraction, chemical analysis, thermogravimetric and differential thermal analysis, scanning electron microscopy and t…
In present study, [110]-oriented cubic phase Mg0.21Zn0.79O/MgO biaxial strained multiple-quantum-well (MQW) nanorods were grown on Al2O3 (101¯0) substrates by pulsed laser deposition technique. In spite of the large lattice mismatch between Mg0.21Zn0.79O and MgO layers, coherent epitaxial growths of cubic Mg0.21Zn0.79…
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.…