Materials Literature
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This review paper provides an overview of the use of hydrogen (H2) gas towards the selective catalytic reduction of nitrogen oxides (NOx) under strongly oxidizing conditions found in many industrial flue gas streams and in the exhaust emissions of diesel-powered vehicles. Patenting activities in the last 15 years are…
Graphene is widely regarded as an important new electronic material with interesting two-dimensional electron gas properties. Not only that, but graphene is widely considered to be an important new material for large-scale integrated electronic devices that may eventually even succeed silicon. In fact, there are count…
The present study attempts to investigate the synergistic effects of graphene nanoplatelets and multi-wall carbon nanotubes on mechanical and physical properties when used as nano-fillers in a conventional aerospace epoxy system. Towards this direction, 0.5 % w.t. graphene nanoplatelets (GNPs) consisting of several gr…
Abstract Using Y(NO 3 ) 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O as the starting materials, the single‐phase YCoO 3 has been synthesized by a two‐step process involving a sol–gel technique and a sintering method. The structure, electromagnetic properties, and thermal stability of the synthesized samples were measured by XRD,…
Es klappt mit Licht: Die Isomerisierung von Azobenzol wird gewöhnlich durch UV-Bestrahlung erreicht, was eine Anwendung in lebenden Systemen einschränkt. Ein neuer Azoschalter funktioniert hingegen vollständig mit sichtbarem Licht. Er basiert auf der Einführung von OMe-Gruppen in o-Position, was zu einer Aufspaltung d…
We perform a systematic first-principles study of energetics and electronic properties of chiral carbon nanotubes (CNTs) in the density-functional theory. It is found that chiral CNTs possess slightly twisted ground-state geometries. Moderate-diameter CNTs show twisting-dependent electronic properties well classified…
Cloaking objects by transmission line and metamaterial is presented. Simulation results reveal that the bandwidth of this method is increased by embedding the transmission networks in a medium whose refractive index is smaller than unity. The low refractive index medium is realized by embedding thin wires in a host me…
Abstract Tungsten‐doped indium oxide (IWO) thin films were deposited on glass substrate by DC reactive magnetron sputtering. The effects of sputtering power and growth temperature on the structure, surface morphology, optical and electrical properties of IWO thin films were investigated. The thickness and surface morp…
In-line, non-destructive process control metrology of high aspect ratio (HAR) holes and trenches has long been a known gap in metrology. Imaging the bottoms of at-node size contact holes in oxide with aspect rations beyond 10:1 has not yet been demonstrated. Nevertheless, holes and trenches of 30:1, 40:1, or even 60:1…
Following the idea that there exists an optimal bandwidth for maximizing the thermoelectric figure of merit ($ZT$), we conduct detailed calculations in this paper to search for the optimal $ZT$ in Bi${}_{2}$Te${}_{3}$/Sb${}_{2}$Te${}_{3}$ quantum dot (QD) nanocomposites (NCs) with Bi${}_{2}$Te${}_{3}$ QDs uniformly em…
Monte Carlo simulations are performed to investigate the effects of the attractive intermolecular interaction, flexibility and size dispersity of carbon nanotubes (CNTs) on the electrical conductivity of CNT/polymer composites. We show that a flexibility plays an important role in the CNT agglomeration; rigid CNTs agg…
Chalcogenide glasses with composition Ge x Sb 40−x S 50 Te 10 (x = 10, 20 and 27 at.%) were synthesized and thin films from these parent materials were evaporated onto glass substrates. The vibrational properties of the impurities in the powdered glasses and the corresponding films were studied by FTIR spectroscopy. V…
Abstract Diamond‐like carbon (DLC) films have excellent mechanical and chemical properties similar to those of crystalline diamond giving them wide applications as protective coatings. So far, a variety of methods are employed to deposit DLC films. In this study, DLC films with different thicknesses were deposited on…
Herein, a novel fluorescent indicator for the real-time monitoring of amines is described. This probe contains a complex of europium-(thenoyltrifluoroacetone)(3) (Eu(TTA)(3)) that efficiently reacts with primary and secondary amines. The electron-withdrawing trifluoroacetyl undergoes a nucleophilic addition with amine…
Hex appeal! Cu(2)S-Pd(4)S hybrid nanocrystals with a novel hexagonal nanoplate structure were prepared in high yield by a simple one-pot synthetic method (see figure). Successful synthesis of this unique structure was achieved through a consecutive thermolysis process. The Cu(2)S-Pd(4)S hybrid nanoplates exhibited sub…
The fatigue failure of a super-elastic NiTi alloy was observed by uniaxial stress-controlled cyclic tests. During the cyclic loading a hysteresis loop with a varied but stabilized size after certain cycles was obtained, which is similar to plastic shakedown. The material exhibits unique brittle fracture with a large t…
A new nanohybrid compound was formed by the concurrent insertion of 2,4-dichlorophenoxy acetate (DPA) used as herbicides and 4-chlorophenoxy acetate (CPA) as plant growth regulator, the two guest anions into the interlamellar space of the host Zn/Al layered double hydroxide (LDH) using co-precipitation or spontaneous…
At the 28nm node using 300mm wafers, oxide step height in STI CMP transient gate after-etch inspection (TG AEI) wafers is a critical parameter that affects device performance and should be monitored and controlled. For production process control of this kind of structure, a metrology tool must utilize a non-destructiv…
The present work investigates the preparation of nonisocyanate polyurethane through condensation of oligomeric hard segments produced by using phenol sulfonic and hydroxybenzoic acids and soft segments obtained by transesterification reaction of polyoxypropylene glycol with ethyl urethane. Obtained nonisocyanate polyu…
Iron perovskites of the ABO 3 type with stoichiometry La 1/2 Sr 1/2 Fe (1– x ) Me x O 3−δ have been substituted with 10% Ta and 20% Ti %, and heat treated in air or in argon. 10% substitution of iron by tantalum in the hole-doped La 1/2 Sr 1/2 FeO 3 decreases the electric conductivity by around 3 orders of magnitude.…