Materials Literature
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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.…
Impact analysis of nuclear plant structural walls composed of surface steel plates, tie-bars, shear studs and concrete are discussed utilizing a simplified model of a fictitious wall to perform the analysis using LS-DYNA. The concrete constitutive model is based on Winfrith concrete model which covers all aspects of c…
This article proposes an approach for identification of partial discharge location in a power cable using a fuzzy inference system and probabilistic neural networks. For accurate determination of the partial discharge source, feature extraction of the measured signals is used in the proposed method. White Gaussian noi…
Abstract We examine in detail the structure and evolution upon annealing of the SiC(3 × 3) reconstruction which is known to be present at the interface between the SiC–C face substrate and the graphene layer for samples prepared in high vacuum. We use ab initio calculations to test the validity of proposed or classica…
A simple and scalable method for the synthesis and stabilisation of MgH2 nanoparticles by self-assembly and confinement has been developed. An azide-terminated poly(styrene; PSTN) with good thermal stability provided a nucleation point for anchoring the polymer at the magnesium surface (see scheme). The hybrid PSTN/Mg…
Cationic amphiphilic random copolyesters were obtained by copolymerization of 5-Z-amino-δ-valerolactone and ε-caprolactone. The amino content of the final copolymers was controlled by the polymerization feed ratio and was in the range 10 to 100%. Copolymers solubility and aggregation behavior was assessed by conductom…
Direct-write, ion implant top surface imaging is a two-step nanopatterning method that simplifies and improves processing of diamond for various applications. The technique utilizes a low-dose (non-milling) gallium ion implant into the first few nanometers of the surface using a focused ion beam. The implanted regions…
The synthesis and a joint experimental and theoretical study of the crystal structure and physical properties of the new ternary intermetallic compound TiGePt are presented. Upon heating, TiGePt exhibits an unusual structural phase transition with a huge volume contraction of about 10 %. The transformation is characte…
This paper examines the effect of iron catalyst thickness on the straightness of growth of carbon nanotubes (CNTs) for microelectromechanical systems fabricated using the CNT-templated-microfabrication (CNT-M) process. SEM images of samples grown using various iron catalyst thicknesses show that both straight sidewall…
The three-unit homoaromatic electron-delocalizing nature of the benzo-fused tetra(triptycene)porphyrins (TTPs) with a three-dimensional conjugated model is clarified using density functional theory studies. Due to the electron delocalization, the unidirectional photon-induced current of this kind of TTP molecular skel…