Materials Literature
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This paper reports on a white light-emitting, polysiloxane-based material obtained by coordinating lanthanide ions (Eu3+ and Dy3+) into α, ω-N,N′-diphenylmalonamide terminated polydimethylsiloxane (PMP). PMP is a new functional polysiloxane designed and synthesized in this work. The luminescence emissions of the raw m…
Spectra in surface-enhanced Raman scattering (SERS) are always accompanied by a continuum emission called the 'background' which complicates analysis and is especially problematic for quantification and automation. Here, we implement a wavelength modulation technique to eliminate the background in SERS and its resonan…
This study is focused on the prediction of coefficient of thermal expansion (CTE) of silica-sand-based fuel-cell seal materials (FcSMs) which in principle require a CTE value in the range of 9.5–12 ppm/°C. A semi-quantitative theoretical method to predict the CTE value is proposed by applying the analyzed phase compos…
Nanostructured V2O5 was prepared by electrochemical anodization in the presence of complex fluoride electrolytes. The reactivity of nanostructured V2O5 was compared to a commercially available V2O5 sample in several oxidation reactions. Catalyst nanostructuring offers improvements in yields as well as rate enhancement…
Amorphous carbon nitride (a-CNx) thin films were deposited using radio frequency plasma enhanced chemical vapor deposition (rf-PECVD) technique. A set of a-CNx thin films were prepared using pure methane (CH4) gas diluted with nitrogen (N2) gas. The rf power was varied at 50, 60, 70, 80, 90 and 100 W. These films were…
The thermodynamic properties and hysteresis behavior of Mg2NiH4 thin films were studied using hydrogenography in the 303–513 K temperature range. For the enthalpy of hydride formation and decomposition, as estimated from a Van't Hoff analysis, we find ΔHabs = −51.2 kJ mol−1 H2 and ΔHdes = −76.3 kJ mol−1 H2. These valu…
The aluminophosphate type zeolitic material, AlPO 4 -5 was synthesized by hydrothermal method using aluminum dross as a raw material, and its water vapor adsorption property was studied. Porous AlPO 4 -5 and nonporous AlPO 4 were formed, and the selectivity of their formation was determined by varying the reactant rat…
A new thin multilayer circuit‐analogue (CA) absorber design consisting of a patterned resistive sheet, glass/epoxy, and glass/MWCNT‐epoxy for X‐band radar is presented. The proposed thin multilayer CA‐absorber (a total thickness of 2.23 mm) has smaller thickness by 0.71 mm than a single‐layer CA‐absorber (a total thic…
A systematic investigation was conducted to determine the excitation energy dependent emission characteristics of CdSe quantum dot–β-carotene and CdSe/ZnS core–shell quantum dot–β-carotene hybrid samples. The emission intensity was recorded at different excitation energies by continuously varying the excitation energy…
Four series of biharmonic experiments on cylindrical samples of circular cross section were carried out. The method of determining the dynamic mechanical properties of low-modulus viscoelastic composites at the biharmonic law of loading is described. The method is used to process experimental data. As a result, graphs…
Chitosan, the second most abundant polysaccharide in nature, after cellulose, has been tested for numerous applications, among which for edible film and coating. Chitosan-based coating showed positive results for shelf life prolongation of meet products. In this paper, dry fermented sausage (Petrovsk? klob?sa) was coa…
Two homoleptic phosphanylamido dysprosium complexes [Li(THF)4][(Ph2PNPh)4Dy] and [Dy{N(PPh2)2}3] have been synthesized. Both have a highly symmetric arrangement of the ligand which is only slightly broken in the solid state by steric and packing effects as a result of the weak coordination of phosphorus atoms to the m…
This paper reports the results of an experimental study on adsorption of light hydrocarbons on small pore microporous materials. The choice of hydrocarbons studied was affected taking into consideration the application of adsorption processes in removal of light hydrocarbons from exhaust streams of the petrochemical i…
Zn-doped cobalt-ferrite, with nominal compositions Co1-xZnxFe2O4(0≤x≤0.3), were synthesized by a novel auto combustion technique. The structural properties of the Zn substituted ferrites have been characterized using x-ray diffraction (XRD). The as-synthesized powders were calcined at 800°C for 3 hrs and the powders w…
Recently, we polymerized a block copolymer that was constructed of side-chain crystalline monomer and a solvent-compatible monomer, which we referred to as a side-chain crystalline block copolymer (SCCBC). This SCCBC has a specific melting point. We found that this SCCBC was adsorbed onto polyethylene (PE) crystal by…
Ball bearings’ rating life is reduced with the presence of hard particle contaminants in the lubricant. This life reduction is taken into account when calculating the modified rating life by using the contamination factor. The contamination factor is based on a general characterization of the lubrication conditions bu…
We develop a unique approach for fabricating high-performance carbon nanotube network transistors based on lithographic density control via a hole punching technique. In an as-grown dense network of single-walled carbon nanotubes (SWNTs), approximately two-thirds of the tubes are semiconducting and one-third are metal…
The current-voltage (I–V) characteristics of the ferroelectric potassium nitrate (KNO3): poly vinyl fluoride (PVF) has been investigated. The current–voltage characteristics gave the peak-to-valley ratio (PVR) of 4.5:1 for the forward bias voltage of +2V at room temperature. The non-linear and butterfly features of th…
Silica hybrid microspheres with diameter of 280 nm have been synthesized from 1 mL tetraethyl orthosilicate (TEOS) and 0.4 mL octadecyltrimethoxysilane (C18TMS) in 20 mL of ethanol solution at room temperature for 24 h. The morphology and size of the samples were investigated by field-emission scanning electron micros…
In the search for novel tetrathiafulvalene-substituted dithiolene ligands, two tetrathiafulvalene (TTF) molecules directly connected to 1,3-dithiol-2-one fragments have been synthesized and characterized by single crystal X-ray diffraction, electrochemical and spectroscopic analyses. TTF1 was obtained, in moderate yie…