Materials Literature
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Using conformal mapping technique, compact and general analytic expressions for the effects of magnetic fluxes on conductance and Fano factor of undoped graphene nanoflakes in pseudodiffusive regime are derived.
The reversible transfer of Au nanoparticles between water and chloroform phases by pH change was achieved by using a long-chain amine derivative. Further, we demonstrated that the phase transfer method was very effective for the fractionation of Au nanoparticles according to their crystal facet distinction.
Electrical and photoresponse properties of Al/porous silicon/crystalline Silicon/Al structure (Al/pSi/c-Si/Al) were investigated. Unoxidized porous Si layer was made on single crystalline p-Si using anodic etching in aqueous HF at a current density of 60 mA/cm2 for 20 min etching time. The structure of porous layer wa…
Polymer biocomposites based on resorcinol-formaldehyde resin matrix, reinforced with pine needles were fabricated by compression moulding technique and further developed in our laboratory. Mechanical properties such as flexural strength, tensile strength, compressive strength and wear resistance of pine needlesreinfor…
The preparation and electrochemical properties of a novel type of composite made of small carbon nano-onions (CNOs) with poly(diallyldimethylammonium chloride) (PDDA) or chitosan (Chit) were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Composite films on glassy carbon electrode surfac…
Magnesium doped thin films of CuCrO2 and CuAl0.5Cr0.5O2, both exhibiting delafossite structure, were synthesized via sol–gel processing. The influence of the dopant on the phase development during the subsequent 2-step annealing procedure was monitored by X-ray diffraction. Systematic variation of the dopant concentra…
Two novel coaxial double-screw-propeller heptanuclear 3d-4f cluster complexes are ferromagnetic: one exhibits a large magnetocaloric effect while the other a magnetic relaxation behavior, depending on the lanthanoid ions used.
The performance limits of a multilayer graphene nanoribbon (GNR) field-effect transistor (FET) are assessed and compared with those of a monolayer GNRFET and a carbon nanotube (CNT) FET. The results show that with a thin high dielectric constant (high-κ) gate insulator and reduced interlayer coupling, a multilayer GNR…
Formic acid (HCOOH) oxidation on Pt(111) under gas-phase conditions is a benchmark heterogeneous catalysis reaction used to probe electro-catalytic HCOOH conversion in fuel cells, itself an important reaction in energy conversion. We used density functional theory (DFT) calculations to elucidate the fundamental oxidat…
A controlled interfacial synthesis using a permeable membrane has been used to obtain ε-MnO2 of a globular morphology, with a mechanism of formation inferred from SEM results. Specific surface areas of 50–160 m2 g−1 have been obtained through simple variation of the permeable membrane used in synthesis. This has been…
Un-doped ZnO and Sn-doped ZnO (SZO) thin films were synthesized using the sol-gel method. The surface morphology of the SZO films showed a large amount of crystallization. Doping with tin dopants not only reduced the surface roughness of the film, but also repaired defects in the pore structure. Notably, the SZO film…
Vinyltrimethoxysilane (VTMS)-modified silica particles were incorporated into the chain of amorphous polyurethane (PU) by covalent bonds, to synthesize an organic–inorganic hybrid material with an extremely long relaxation time. At 1% silica, the PU–silica chemical hybrids gave over 99% shape fixity and shape recovery…
Oxide nanowire networks or oxide nanonets leverage some of the exceptional functionalities of one-dimensional nanomaterials along with the fault tolerance and flexibility of interconnected nanowires to creating exciting opportunities in large-area electronics as well as green energy systems. This paper reviews the ele…
This study proposes a novel two-step strategy to prepare single-phase unitary/binary oxides-graphene composites: precipitating hydroxides followed by microwave-assisted hydrothermal or solvothermal annealing.
Pesticides are widely used in agriculture, although they may create hazards both to humans and to the environment. In order to reduce the harmful effects of their administration, there has been made a great effort to find solutions. The porous sol-gel silica materials which are able to entrap different organic molecul…
Many experimental measurements have been done on GNR conductance. In this paper, analytical model of GNR conductance is presented. Moreover, comparison with published data which illustrates good agreement between them is studied. Conductance of GNR as a one‐dimensional device channel with parabolic band structures nea…
A terbium probe for the selective time-gated detection of hydroxyl radical is presented. This probe demonstrates high sensitivity with an 11.0-fold increase in time-gated luminescence intensity for an hour-long exposure to hydroxyl radical concentration in the femtomolar range, and high selectivity for HO* over other…
The biological synthesis of nanoparticles emerges as an eco-friendly and exciting approach in the field of nanotechnology. In the present investigation, we report the extracellular biosynthesis of silver nanoparticles (AgNP`s) using plant leaf extracts (Artocarpus heterophyllus) for the reduction of aqueous Ag+ ions a…
In this paper, a double-layer metamaterial is proposed composing of twisted metallic foil pairs and dielectric spacer. Negative refractive index can be realized originating from chiral configuration of this metamaterial. With precious tuning of rotated angle in each metallic foil pair and dielectric thickness h, diffe…
In this paper, an easy method for the iron loss prediction in pulsewidth-modulation (PWM) inverter-fed induction motors is presented. The method was initially proposed and validated for the prediction of iron losses in a nonoriented soft magnetic material with PWM supply. Starting from the iron losses measured with a…