Electrical properties, thermodynamic behavior, and defect analysis of Lan+1NinO3n+1+δ infiltrated into YSZ scaffolds as cathodes for intermediate-temperature SOFCs
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Effect of functionalization on the interfacial binding energy of carbon nanotube/nylon 6 nanocomposites: a molecular dynamics study
The critical challenge for preparing carbon nanotube (CNT)/polymer nanocomposites is how to create a strong interfacial binding energy (IBE) between the polymer matrix and the CNT. Molecular dynamics simulations of nylon 6 melts and its composite with pristine CNT or functionalized CNT embedded have been performed. Th…
Occurrence of spontaneous resolution of ketoprofen with a racemic crystal structure by simple crystallization under nonequilibrium preferential enrichment conditions
Nearly racemic ketoprofen, which satisfies the requirements for the occurrence of preferential enrichment, was spontaneously resolved into the two enantiomers by simple crystallization under nonequilibrium conditions using high concentrations.
Templated heptaborate and pentaborate salts of cyclo-alkylammonium cations: structural and thermal properties
The synthesis and characterization of a series of cyclo-alkylammonium pentaborate salts {[cyclo-C(n)H(2n-1)NR(3)][B(5)O(6)(OH)(4)] (R = H, n = 3, 5-7 (1-4); R = Me, n = 6 (5))} are reported. Compounds 1, 2 and 5 have been further characterized by single-crystal XRD studies. Attempted recrystallization of 3 and 4 yield…
Effect of Synthesis Temperature on the Growth Iron-Filled Carbon Nanotubes as Evidenced by Structural, Micro-Raman, and Thermogravimetric Analyses
Tubular structure and well dense of aligned carbon nanotubes (CNTs) were formulated using two-stage catalytic chemical vapor deposition apparatus. In this experiment, aligned CNT was synthesized in the range of 700–900°C temperatures with increment rate of 50°C per sample. The aligned CNT properties were investigated…
Electrochromic Property Dependent on Oxygen Gas Flow Rate and Films Thickness of Sputtered WO3 Films
Tungsten oxide films (WO3) were deposited on ITO/glass substrates with tungsten target in UHV by d.c. reactive magnetron sputtering. The WO3 films were deposited at various O2 flow rates from 5 to 20 sccm and various film thicknesses from 50 to 500 nm at 10 mTorr operating pressure as controlled by pressure control ga…
Synthesis, Characterization, and Photocatalytic Activity of Microspheres Functionalized with Porphyrin
In order to utilize visible light more efficiently in the photocatalytic reaction, microspheres sensitized by 5-(4-allyloxy)phenyl-10,15,20-tri(4-methylphenyl)porphyrin (APTMPP) were prepared and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen physisorption, scanning electron…
The novel upconversion properties of LiYbF4:Er microcrystals compared to the Na counterpart
Erbium-doped ytterbium fluoride compounds with different crystal phases and morphologies have been synthesized via a facile hydrothermal route assisted with EDTA. Tunable upconversion emissions can be obtained by replacing Na+ with Li+ in NaYbF4 microcrystals. An interesting blue shift is observed and a mechanism base…
A 2 : 2 stilbeneboronic acid–γ-cyclodextrin fluorescent ensemble highly selective for glucose in aqueous solutions
By designing a long and hydrophobic stilbeneboronic acid (STDBA) and allowing it to be included within the cavity of γ-cyclodextrin (γ-CyD) we succeeded in developing a fluorescent 2 : 2 STDBA-γ-CyD ensemble that shows a selective and sensitive response toward glucose in aqueous solutions, with satisfactory applicatio…
Two-phase microwave-assisted synthesis of Cu2S nanocrystals
We demonstrated a new two-phase microwave-assisted method for the synthesis of high-quality copper sulphide (Cu2S) nanocrystals with well-defined size, chemical composition and crystal structure.
Debonding and fracture of ceramic islands on polymer substrates
We perform in-situ uniaxial tensile tests on polyimide substrates with patterned ceramic islands. The islands fail by either channel cracking or debonding from the substrate, depending on island size and thickness. To understand why different failure modes occur, we have analyzed the fracture and debonding of stiff is…
‘Bridge’ effect of CdS nanoparticles in the interface of graphene–polyaniline composites
A facile method for preparing graphene–polyaniline composite is proposed without the necessity of using graphene oxide. By adding CdS nanoparticles into the in situ polymerization system consisting of graphene and aniline monomers, a graphene–polyaniline composite with a well-bonded interface is yielded. It is found t…
Synthesis of Electrolyte Polymer Based on Natural Polymer Chitosan by Ion Implantation Technique
This research is conducted to make solid-state electrolyte based on natural polymers, as an alternative material for energy storage such as battery. Natural polymers as materials of solid state batteries have various benefits, such as unlimited abundance, biodegradable, unleakage, stable form, excellent process, and e…
Modular self-assembled multiporphyrin cages with tunable shape
Three new molecular cages-a trigonal prism (2) and two cubic-shaped boxes of increasing size (3, 4)-featuring as many as 10 porphyrins were obtained in quantitative yields by self-assembly of a single bis-zincporphyrin metallacycle (1) with appropriate polytopic N-linkers: the trigonal planar tpt or the cruciform porp…
Raman Spectroscopic Study of Carbon Nanotubes Prepared Using Fe/ZnO‐Palm Olein‐Chemical Vapour Deposition
Multiwalled carbon nanotubes (MWCNTs) were synthesized using Fe/ZnO catalyst by a dual‐furnace thermal chemical vapor deposition (CVD) method at 800–1000°C using nitrogen gas with a constant flow rate of 150 sccm/min as a gas carrier. Palm olein (PO), ferrocene in the presence of 0.05 M zinc nitrate, and a p‐type sili…
Influence of curcumin on the Al(iii)-induced conformation transition of silk fibroin and resulting potential therapy for neurodegenerative diseases
Neurodegenerative diseases involve the disorder of protein folding in which normally soluble proteins are deposited as abnormally insoluble fibrils that disrupt tissue structure and cause disease. Aluminum ion, Al(III), is known to induce formation of the insoluble β-sheet-rich fibrils, while curcumin is considered ca…
A first-principles density functional theory study of the electronic structural and thermodynamic properties of M2ZrO3 and M2CO3 (M = Na, K) and their capabilities for CO2 capture
Alkali metal zirconates could be used as solid sorbents for CO2 capture. The structural, electronic, and phonon properties of Na2ZrO3, K2ZrO3, Na2CO3, and K2CO3 are investigated by combining the density functional theory with lattice phonon dynamics. The thermodynamics of CO2 absorption/desorption reactions of these t…
Preparation of highly dispersed catalytic Cu from rod-like CuO–CeO2 mixed metal oxides: suitable for applications in high performance methanol steam reforming
A space-confined synthesis method, using a mesoporous template to produce nano-sized copper particles (∼2 nm diameter) by the thermal hydrogen reduction (THR) of high surface area (∼105 m2 g−1) rod-like CuO–CeO2 calcined at 700 °C, is described. X-Ray diffraction (XRD) and temperature program reduction (TPR) results s…
Study on Extracting of Germanium with Trioctylamine
Optimum conditions of germanium extractions were investigated from a sulphuric acid zinc solution by using a kind of extractant TOA, complexing agent C4H6O6and improving reagent C12H27O4P, in addition to kerosene as diluent and NaOH as stripping agent. The results show that this process has the following advantages: s…
Surface-initiated enzymatic vinyl polymerization: synthesis of polymer-grafted silica particles using horseradish peroxidase as catalyst
A novel method of surface-initiated enzymatic vinyl polymerization was used to synthesize organic–inorganic hybrid core–shell particles comprising a silica core and a polyacrylamide shell covalently attached to the core surface.