Materials Literature
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A novel, powerful method based on a microkinetic approach is described for the estimation of the oxygen transport parameters of mixed electronic conducting materials (MIECs). This method is validated on the perovskite La0.6Sr0.4Co0.2Fe0.8O3-δ and has been applied on Ba0.5Sr0.5Co0.8Fe0.2O3-δ. This approach is original…
Pd-F:SnO2 thin films have been prepared by spray pyrolysis technique. Optimization has been done by doping SnO2 with palladium at varying levels of concentration and then recording sheet resistance. The sheet resistivity has been observed to decrease gradually as at% Pd concentration is increased; an optimum sheet res…
We present an experimental study of two-phase flow in a quasi-two-dimensional porous medium. The two phases, a water-glycerol solution and a commercial food grade rapeseed/canola oil, having an oil to water-glycerol viscosity ratio of 1.3, are injected simultaneously into a Hele-Shaw cell with a mono-layer of randomly…
An interatomic potential for Al is developed within the third generation of the charge optimized many-body (COMB3) formalism. The database used for the parameterization of the potential consists of experimental data and the results of first-principles and quantum chemical calculations. The potential exhibits reasonabl…
Future high-speed electronic devices rely on the integration of hot-carrier generation and short transit time. The combination of a graphene–metal electrode can enable an extremely high ballistic electron emission bias to the graphene mesh at ambient conditions.
Colloidal particles with two or more different surface properties (Janus particles) are of interest in catalysis, biological imaging, and drug delivery. Eccentric nanoparticles are a type of Janus particle consisting of a shell that envelops the majority of a core particle, leaving a portion of the core surface expose…
A series of novel non-symmetrically substituted mono β-aryl and β-arylethynyl (alkylsulfanyl)porphyrazines and the corresponding Ni(ii) complexes have been prepared by the Suzuki-Miyaura and Sonogashira cross-coupling reactions with the aim to investigate substituent effects on their electronic and aggregation propert…
Maintaining the protein activity and stability under acidic conditions is important in bioengineering and biomedical applications. Polyelectrolyte conjugation as a means of stabilizing proteins has received much recent attention. Retention of protein activity, and especially, improvement of protein stability by minimi…
To explore the effect of negative thermal expansion on the reduction of the coefficient of thermal expansion of polymer with respect to that of chain stiffening, the preparation of polycarbonate composites with ZrW 2 O 8 and ZrW 2 O 7 (OH) 2 ·2H 2 O are attempted. In the process, the dispersion of the filler particles…
Biocatalytic evolution of thermodynamically downhill nanostructured peptide libraries in hydrogel states are envisaged.
Using first-principles calculations, we show that substitution of sulfur (anion) in the oxygen site of tetragonal potassium niobate perovskite (KNbO3) leads to a highly polar and very stable ferroelectric (FE) state. It was found that KNbO2S possesses a spontaneous polarization of 0.80 C/m2, twice that of the mother F…
The corrosion behavior of commercial aluminum in HCl was investigated by gravimetric method in absence and presence of date palm leaf extract (DPLE) as inhibitor. Corrosion rates in absence of extract ranged from 2.4-8.0 mg/cm2/h in the temperature range 20- 50ºC but decreased down to 0.30-2.6 mg/cm2/h in presence of…
When it comes to spinning polymer fibers, spiders are much better than scientists. However, the authors have narrowed the gap: Extensive simulations show that for by judiciously oscillating the spinneret, instabilities can be tamed and extremely thin fibers can be extracted. Remarkably, this effect is independent of t…
Ionic species in aqueous solutions alter protein solubility and aggregation behavior through a variety of complex interactions.
We study the effect of Coulomb interactions on the low-energy band structure of single-layer transition metal dichalcogenide semiconductors using an effective low-energy model. We show how a large conduction band spin splitting and a spin dependent Fermi velocity are generated in ${\mathrm{MoS}}_{2}$, as a consequence…
We propose that bilayer graphene can provide an experimental realization of deconfined criticality. Current experiments indicate the presence of N\'eel order in the presence of a moderate magnetic field. The N\'eel order can be destabilized by application of a transverse electric field. The resulting electric field in…
Au–Pt bimetallic nanocomplexes were synthesized and the composition and morphology of the nanocomplexes could be easily controlled by a facile synthesis method.
Utilizing the insulator-metal phase transition of vanadium dioxide (VO2) crystal films, we develop a dual-functional sensor based on the coupling between VO2 nano-crystal films and Ag nanoparticles, which can probe fluorescence or Raman signals on the same substrate and it is switchable by changing temperature. At roo…
The microphase separation of side chain liquid crystalline (SCLC) block copolymers was studied using dissipative particle dynamics (DPD) simulations.
In this paper, we investigated electronic, optic, elastic, dynamic and thermodynamic properties of RbAu compound by density functional theory within the generalized gradient approximation. The calculated static value of real part of dielectric constant is 6.7. The calculated electronic band structure of RbAu shows tha…