Materials Literature
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Mg(BH4)2 is a complex hydride with one of the highest hydrogen contents (∼ 15%) known yet. Several synthesis routes have been reported for it, all based on the metathesis reaction of MgCl2 with NaBH4 performed in a ball-mill or in suitable solvents. In the present study a new approach for synthesis of Mg(BH4)2 will be…
The low cost thermoelectric generator (LCTEG) and high performance are investigated. We have investigated a new compound and manufactured locally based area to reduce costs of production. The thermoelectric power generation composed of small n-type (n-CaMnO3) and p-type (p-Ca3Co4O9) of 31 couples/ in2 and the use of t…
Environmental effects are very important in nanoscience and nanotechnology. This work reviews the importance of the substrate in single-wall carbon nanotube properties. Contact with a substrate can modify the nanotube properties, and such interactions have been broadly studied as either a negative aspect or a solution…
Aminocaproic acid (ACA) mixed methanolic lead acetate-thiourea (PbAc-TU) complex as precursor for fabrication of lead sulphide (PbS) nanoparticles (NPs) has been explained. The size, structure and morphology of as-prepared ACA-capped PbS NPs were systematically characterized by scanning electron microscopy (SEM), Tran…
The authors report the systematic shape-controlled synthesis of wurtzite-type tetrapod-like ZnO (T-ZnO) micro-nanocrystals (μNCs) using a tin-assisted vapor-phase transport (VPT) method. A morphological rebound in the VPT-grown T-ZnO μNCs was first observed at the narrow substrate temperature (Ts) window, 710 °C < Ts…
A new amphiphilic molecule bearing poly(ethylene oxide) (PEO) and quaternary ammonium group, was designed and synthesized to encapsulate paramagnetic Gd(III)-containing polyoxometalate (Gd-POM) through electrostatic interaction for obtaining a water-soluble organic-inorganic hybrid building block based on POM. The yie…
Several acetylene bridged porphyrin-monophthalocyaninato ytterbium(III) hybrids, PZn-PcYb, PH(2)-PcYb and PPd-PcYb, have been prepared and characterized by (1)H and (31)P NMR, mass spectrometry, and UV-vis spectroscopy. Their photophysical and photochemical properties, especially the relative singlet oxygen ((1)O(2))…
Single-walled carbon nanotube network field effect transistors were fabricated and studied as humidity sensors. Sensing responses were altered by changing the gate voltage. At the open channel state (negative gate voltage), humidity pulse resulted in the decrease of the source-drain current, and, vice versa , the incr…
We review the classification of all the 36 possible gap-opening instabilities in graphene, i.e. the 36 relativistic masses of the two-dimensional Dirac Hamiltonian when the spin, valley, and superconducting channels are included. We then show that in graphene it is possible to realize an odd number of Majorana fermion…
A Pt(II) containing isopolytungstate complex [Pt(2)W(10)O(36)](8-) (1) has been obtained by reaction of K(2)PtCl(4) and Na(2)WO(4); the polyoxoanion consists of two lacunary Lindqvist fragments {W(5)O(18)}(6-) connected by two Pt(II) in square planar coordination.
Weight loss technique has been used to study the corrosion inhibition efficiency of tin in HNO3 solution by using the leaves and stem extract of different varieties of Holy Basil viz. ocimum basilicum (EB),, ocimum cannum (EC) and ocimum sanctum (ES). The results show that all the varieties under study are good corros…
Recent experiments have shown that colloidal crystals confined to weakly curved capillary bridges introduce groups of dislocations organized into ‘pleats’ as means to relieve the stress caused by the Gaussian curvature of the surface. We consider the onset of this curvature-screening mechanism, by examining the energe…
This work deals with the electrochemical polymerization of pyrrole. The electrochemical polymerization process is evaluated in terms of polymer yield and conversion with respect to monomer and dopant concentrations, applied voltage, and polymerization temperature. An expression for predicting the system current as a f…
The complex dielectric constant of pure and cerium doped calcium-barium-niobate (CBN) was studied at frequencies 20 Hz ≤ f ≤ 1 MHz in the temperature range 300 K ≤ T ≤ 650 K and compared with the results for the well known ferroelectric relaxor strontium-barium-niobate (SBN). By the analysis of the systematically take…
PET Vascular prostheses are susceptible to physical modification and chemical degradation leading sometimes to global deterioration and rupture of the product. To understand the mechanisms of degradation, we studied 6 vascular prostheses that were explanted due to medical complications. We characterized their level of…
Three new tetramolybdenum organophosphonate compounds, (NH4)7{FeIII[MoVI2O6CH3C(O)(PO3)2]2}·10H2O 1, (NH4)4[Na(H2O)6]{CrIII[MoVI2O6CH3C(O)(PO3)2H]2}·7.67H2O 2 and (NH4)8{MnII[MoVI2O6CH3C(O)(PO3)2]2}·9H2O 3 have been successfully synthesized by reacting metal-containing oxidants Fe2(C2O4)3, MnO4− and CrO42− with a simp…
Liquid crystals are compounds that display order in the liquid state above the melting temperature and below the mesogenic isotropic temperature. Polymer-dispersed liquid crystals (PDLCs) are composite materials in which liquid crystalline material is dispersed within a polymer matrix to form micron-sized droplets. Th…
The surface topography of different polymer films (polyterephthalates, polyolefins, polyethers) after oxidative plasma treatment has been studied. Distinct surface nanopatterns were observed depending on the polymer type and were characterized by SEM. Their geometry and dimensions at low etching degrees (0.5–1 μm etch…
A series of Ni-Al hydrotalcite-type samples modified with copper was prepared and evaluated for use in the decomposition of ethanol. The partial substitution of Ni by Cu has small influence on the specific surface area and on the structure (XRD). However, it has a strong influence on the degree of reducibility (shifts…
Developments in nanotechnology are leading to acceptance of this technology in day-to-day life as it continues to provide solutions and alternatives to technological, environmental, and health challenges. Central to all nanotechnology based applications are nanostructures, among which nanoparticles (NPs) are the ones…