Materials Literature
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On some aspects concerning solution-suspension polymerization of N-vinylformamide **)Summary -N-vinylformamide (NVF), a blocked vinylamine monomer, has become an important reagent in the synthesis of water-soluble resins.NVF can be easily polymerized in aqueous solutions, in bulk, in suspension and by means of emulsio…
In this investigation, the binary aqueous solutions of Potassium Fluoride have been studied using the hygrometric method at different temperatures 298.15K–353.15K. The water activities are measured at molalities from 0.10 mol kg−1 to saturation. The obtained data allow the deduction of osmotic coefficients. From these…
We present a micro-optical imaging system with active scanning function to expand the field of view of a single lens. We demonstrate design concepts for focusing and scanning elements, fabrication fundamentals as well as experimental results with multiple individually tunable lenses.
The decomposition of 1-chloro-4-ethylbenzene under UV irradiation (λ = 253.7 nm) in the presence of dioxygen and the dioxomolybdenum(VI)dichloro[4,4′-dicarboxylato-2,2′-bipyridine] complex anchored on the TiO 2 surface has been investigated. The catalytic cycle includes the photostimulated transfer of the oxo-oxygen a…
In this work, shear and uniaxial extensional viscosities of polypropylene melt blown sample with melt flow rate equal to 450 g/10min have been determined in wide deformation rate range by using capillary rheometry and novel orifice die design and the capability of recently proposed generalized Newtonian model to descr…
We report the electrochemical synthesis and characterization of hybrid structures composed by hollow nanotubes of polypyrrole and core-shell composites of multi-walled carbon nanotubes (MWCNTs) coated by polypyrrole (PPy). The synthesis of these systems is critically dependent on relative concentration of carbon nanot…
A comparison of the results of depth profiling of multilayer metal structures by secondary ion mass spectrometry with the use of various types of the registered secondary ions has been conducted. For the first time, it has been demonstrated that, to increase depth resolution, two variants can be used in addition to th…
- Inductive heating is a technological process where a steel workpiece is surrounded by an electromagnetic coil to which currents at various frequencies and time-varying amplitudes are applied. The amplitudes are considered as the controls and the objective is to heat the workpiece up to a desired temperature profile…
Y.-L. Zhang, H.-B. Sun and co-workers report the facile fabrication of highly efficient SERS substrates from natural rose petals. The unique surface superhydrophobicity and the hierarchical nature of the structures contribute to their high sensitivity and low detection limit.
Conventional linear regression analysis methods used to measure muscle fatigue based on mean power frequency (MPF) can yield results that are dependent on the epoch of each MPF value. An improved algorithm containing two window segmenting methods, overlapped and non‐overlapped schemes, is provided to investigate the e…
Cinnamate/layered double hydroxide (LDH) composites were prepared by a reconstruction method using sodium cinnamate solution. The cinnamate solution of 100 mM was the most remarkable condition to obtain high cinnamate content of the cinnamate/LDH composite. The composite included about 30 mass % of cinnamate was prepa…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation P. Agrawal, M. Sachdeva, Anupinder Singh, B. Suthar, A. Bhargava; Structural and optical properti…
Cu2ZnSnSe4(CZTSe) films were formulated by the selenization of Cu(Zn, Sn) (CZT) metal precursors. The CZT precursor was prepared by depositing zinc onto a Cu-Sn layer co-sputtered on molybdenum-coated soda-lime glass substrates. Selenium was evaporated thermally onto the CZT precursor. The resulting CZTSe film was the…
Bubble removal in viscoelastic solution is an important challenge in both industry production and laboratory experiments. However, no effective physical bubble removal technique in viscoelastic solutions has been reported until now. In this study, the ultrasonic vibration effect on bubble removal in viscoelastic solut…
This paper reports on a study of the effects of cold work induced by surface enhancement treatment on conductivity profiles in nickel-base superalloys, as part of the on-going efforts aimed at evaluating the feasibility of characterizing near-surface residual stress profiles in peened engine components using a swept f…
The present work deals with a detailed analysis of the small-angle X-ray scattering of nanoporous atomistic models for amorphous germanium. Structures with spherical nanovoids, others with arbitrarily oriented ellipsoidal ones, with monodisperse and polydisperse size distributions, were first generated. After relaxing…
A two-dimensional fluid model has been used to investigate the properties of plasma in an Ar/NH3 low pressure magnetized direct current discharge. We compared the simulation results with the theoretical and experimental results of the other gas discharge in which the magnetic field is considered. Results that obtained…
This paper presents the preliminary transport measurements obtained using graphene quantum dots. Graphene quantum dots of 4.5 nm average diameter size prepared by electrochemical method are found to be of p-type nature under ambient condition. The p-type nature obtained is attributed to the physisorption of water mole…
Abstract. The universal method of reliability assessment of mechanical system loaded elements at the design stage as a sequence of steps within the procedure of constructing physical and probabilistic models of parametric failure formation based on various criteria is suggested. The methodology of forecasting durabili…
The very best Cu(In,Ga)(S,Se)2 solar cells have a double graded band gap in the absorber, i.e. a notch profile, formed by varying the ratio of Ga to In. If this is a prerequisite or a consequence of high quality deposition methods is something yet of discussion. In this work we have constructed a high efficiency model…