Materials Literature
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The gas-phase dimers Au2+ and Pd2+ have been shown to readily activate methane and to facilitate its dehydrogenation eventually leading to the selective formation of ethylene at room temperature in the case of Au2+. Ion trap mass spectrometric investigations under multi-collision conditions reveal similar product ion…
Nitrogen‐doped carbon nanotubes (N‐CNTs) were synthesized by pyrolysis of (4‐{[(pyridine‐4‐yl)methylidene]amino}phenyl)ferrocene in a solution of either acetonitrile or toluene as carbon source. This was achieved by testing three different growth temperatures (800, 850, and 900°C), and the 850°C was found to be the mo…
In this paper we have prepared a series salen derived ligands based on a trans-1,4-diaminocyclohexane backbone. The ligands could be easily complexed to either Ti(IV) or Al(III) metal centres generating complexes with formulae Ti2(OiPr)6(L) and Al2(Me)4(L) respectively. The complexes were shown to be efficient initiat…
A novel core–shell molecularly imprinted polymer based on β-NaYF4: Yb3+, Er3+ upconversion fluorescent nanoparticles (UCNPs@MIP) has been successfully synthesized, which has a homogeneous polymer film, shows thermal stability, exhibits excellent near-infrared upconversion luminescence emission and sensitivity and sele…
Alicyclic tetracarboxylic dianhydrides having alkanone bis-spironorbornane structure were synthesized and polycondensated with aromatic diamines. The polyimide films were prepared by a thermal and a chemical imidization methods. Poly(amic acid)s possessed an inherent viscosity (ηinh) range of 1.1-0.5 dL/g and gave fle…
The effects of relative humidity on the initial atmospheric corrosion of zinc during drying of chloride-contained absorbed thin electrolyte layer was investigated by mass loss, scanning electron microscopy (SEM), cathodic polarization curves, pre-Tafel polarization curves fitting method and electrochemical impedance s…
Laser ablation is the process of removing material from a solid surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. At high laser flux, the material is typically converted to a plasma. Usually, laser ablation refers to removi…
Two pairs of enantiomerically pure three-dimensional (3D) chiral polyoxometalate (POM) framework materials l,d-[K(H2O)]6·[H2GeW12O40]3·35H2O (1a and 1b) and l,d-[K(H2O)]6·[H2SiW12O40]3·29H2O (2a and 2b) based on inorganic achiral building blocks, have been synthesized and characterized by X-ray crystallography, elemen…
The novel polymer poly(5-methylenebenzotriazol-N-yl), denoted BTA-poly, was investigated for the protection of copper by electrochemical studies and weight loss measurements. The electrochemical measurements were compared to weight loss measurements and satisfactory results were obtained. Compared with benzotriazole,…
The monodentate ligand 1-isobutyl-1H-tetrazole (i4tz) was used to synthesize a series of iron(II) spin-crossover (SCO) complexes with the general formula [Fe(i4tz)6]X2, where X = ClO4(-) (1), PF6(-) (2), SbF6(-) (3), or BF4(-) (4). Upon cooling, magnetic susceptibility measurements of compounds 1, 2 and 3 show a rever…
The poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) copolymer systems with different reactive time were synthesized for the first time via the homo-/cross-coupling reaction of PLA and PBS. Nuclear magnetic resonance spectroscopy (1H-NMR) results showed that the homo-coupling of PLA occurred much earlier tha…
We use self-consistent field theory (SCFT) to study the self-assembly of diblock copolymers confined in cylindrical and non-cylindrical prepatterns. This situation arises in contact holes -the hole shrink problem- where the goal is to produce a contact hole with reduced dimensions relative to a guiding prepattern. In…
The energetics of elementary surface processes relevant for CO oxidation, particularly CO and 02 adsorption, were investigated by a direct calorimetric method on model Pd nanoparticles and on the extended Pd(111) single crystal surface. The focus of this study lies on a detailed understanding of how a nanometer scale…
Hierarchical metal oxide nanostructures that possess unique chemical and physical properties have attracted widespread interest recently because of their potential applications in catalysis, biological engineering, and photoelectronic devices. Herein, hierarchical ZnO nanostructures (ZONS) with unique structural featu…
A two steps direct polycondensation process of poly(D-lactic acid) (PDLA) synthesis was studied. The melt- polymerization was combined with esterification using p-Toluenesulfonic acid without addition of metal catalyst. The pre-polymer product from the first step was subsequently subjected to solid-state polymerizatio…
Neural regeneration was once considered to be impossible, especially in the central nervous system where neural regeneration comprise the generation of new neurons, glia, axons, myelin, and synapses. Until recently, neural stem cells/neural progenitor cells (NSCs/NPCs) were identified from various areas of brain and b…
Titanium alloy, Ti-6Al-4 V, and commercially pure (CP) Titanium will be used to protect the Solar Probe Plus (SPP) spacecraft against hypervelocity impacts by solar dust particles. The results of six hypervelocity impact (HVI) tests performed on Ti-6Al-4 V and CP monolithic samples (3 each) are evaluated in terms of c…
Barium osumilite (BMAS) ceramic matrix composites reinforced with SiC-Tyranno fibers are tested in a cyclic loading protocol. Broadband acoustic emission (AE) sensors are used for monitoring the occurrence of different possible damage mechanisms. Improved use of AE indices is proposed by excluding low-severity signals…
Molecular self-assembly of biomolecules, especially proteins and peptides has elucidated much interest in recent years due to the reproducibility of structures and the high degree of control on the formation kinetics and morphology by varying the self-assembling conditions. These self-assembled structures have found w…
The time-dependent adsorption of 1-pyrenebutyric acid, a model compound for polyaromatic carbon adsorption, onto graphene nanoplatelet-single-wall carbon nanotube hybrid papers is investigated experimentally based upon changes in optical absorption spectra.