Materials Literature
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A series of WO 3 -SBA-15 materials with different Si/W ratios have been hydrothermally synthesized using tetraethyl orthosilicate (TEOS) as silica precursor, ammonium paratungstate as tungsten precursor, and EO 20 PO 70 EO 20 (P123) as structure-directing reagent. After temperature-programmed carburization (TPC) in fl…
Lead-free ceramics (1−x)(K0.5Na0.5)NbO3–xBa(Zr0.05Ti0.95)O3 doped with 1mol% MnO2 have been fabricated by pressureless sintering. With the MnO2 doping, all the ceramics can be well sintered at 1100–1160°C and exhibit a dense and pure perovskite structure. After the addition of Ba(Zr0.05Ti0.95)O3, a relax behavior is i…
A low temperature thermal energy harvesting system to supply power to wireless sensing modules is introduced. The thermoelectric generator module (TEG) makes use of the temperature gradient between the human body (the heat source) and the ambient to deliver a low voltage output that is up-converted by means of a power…
An analytic model to describe the heterogeneous recombination of a single atomic species on silicalike surfaces is developed. The theoretical investigation herein presented provides ready-to-use expressions for the surface atomic recombination probability γ obtained as a function of surface characteristics such as the…
A series of six azuliporphyrins with substituents on the seven-membered ring were prepared by two different "3 + 1" routes from 6-tert-butyl- and 6-phenylazulene. The substituted azulenes can be converted into dialdehydes under Vilsmeier-Haack conditions, and these react with tripyrranes in the presence of TFA in CH2C…
A commercial superconducting quantum interference device (SQUID) setup (MPMS 5S from Quantum Design), equipped with a magnetic ac susceptibility option, is modified for measurements of the linear magnetoelectric (ME) effect, i.e., of the magnetic moment induced by an applied external electric field in a ME sample. Tes…
In this paper, it is shown that ferroresonant oscillations involving voltage transformers (VTs) may be initiated by switching transients in ungrounded medium-voltage networks. It was demonstrated that various modes of ferroresonant oscillations may exist for the same VT type depending on the initial conditions and on…
Banana fiber obtained from the sheath of the banana plant, Musa sapientum, has been used in the preparation of composites with polyester matrix. The effect of fiber loading on the dielectric constant, volume resistivity, and dielectric loss factor of the composites were determined with special reference to the effect…
The spatial arrangement of nanostructures such as inorganic nanoparticles in a host matrix or domains in block copolymer thin films has been extensively studied due to their potential applications in diverse fields ranging from block copolymer
Photoinduced processes of a series of phosphorus tetraphenylporphyrin (PTPP) derivatives ([PTPP-(NHC6H4X)2]+Cl-, X = OCH3, CH3, H, Cl, CF3, and CN) have been investigated by using femtosecond laser flash photolysis mainly. PTPP with OH as an axial ligand showed S2 fluorescence upon excitation of the Soret band. The S2…
A novel polyoxovanadate (POV), [Zn(2,2'-bpy)3]4[(ppz){{Zn(tepa)}2ZnAs8V13O41(H2O)}2][As8V14O42(0.5H2O)]2.4H2O (1, 2,2'-bpy = 2,2'-bipyridine, ppz = piperazine, tepa = tetraethylenepentamine), has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectra, thermogravimetric analysi…
Abstract The Clay Minerals Society published a complete characterization scheme for its ‘Source Clays’ but not for its ‘Special Clays’. To address this issue, the specific surface areas (SSAs) of the 16 special clays from The Clay Minerals Society were determined using the Brunauer, Emmett and Teller (BET) method of a…
The hexadecyl amine capped Ag nanoparticles in chloroform are prepared by reducing [Ag(hexadecyl amine) 2 ]NO 3 complex with sodium borohydride in a chloroform/water medium. Poly(3-hexyl thiophene) (P3HT)−silver nanoparticle composites at five different compositions [Ag10, Ag25, Ag50, Ag75, and Ag90; the number indica…
Adsorption isotherms of benzaldehyde from aqueous solutions onto granular activated carbon have been determined and studied the effect of dosage of granular activated carbon, contact time, and temperature on adsorption.Optimum conditions for benzaldehyde removal were found adsorbent dose g » 4 g l -1 of solution and e…
The potential of Co-Re-based alloys as a new high temperature material class for service beyond 1200°C is explored. Complete miscibility of Co and Re and high melting point of Re provides good opportunity to design high temperature alloys. The rational for focusing on Co-Re-based alloys for gas turbines application be…
Catalytic esterase peptide dendrimers with a core active site were discovered by functional screening of a 65,536-member combinatorial library of third-generation peptide dendrimers using fluorogenic 1-acyloxypyrene-3,6,8-trisulfonates as substrates. In the best catalyst, RMG3, ((AcTyrThr)(8)(DapTrpGly)(4)(DapArgSerGl…
The reactions of [Mn12O12(O2CEt)16(H2O)4] with phenylphosphinic acid (PhHPO2H) in MeCN and MeCN/CH2Cl2 have led to isolation of [Mn22O12(O2CEt)22(O3PPh)8(H2O)8] (2) and [Mn22O12(O2CEt)20(O3PPh)8(O2PPhH)2(H2O)8]n (3), respectively, both containing PhPO3(2-) groups from in situ oxidation of PhHPO(2)(-). Complex 2 is mol…
We have investigated the magnetic and magnetoelastic properties of a series of Cr-substituted cobalt ferrite CoCrxFe2−xO4 (x=0.0–0.79) samples. Substitution of Cr for some of the Fe in cobalt ferrite reduced the Curie temperature, and the effect is more pronounced than that observed in Mn-substituted cobalt ferrite sa…
Density functional theory by means of the mixed-basis pseudopotential method was employed to carry out electronic-structure calculations of interfaces in $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}∕\mathrm{La}\mathrm{Al}{\mathrm{O}}_{3}$ and $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}∕\mathrm{Sr}\mathrm{Ru}{\mathrm{O}}_{3}$ p…
Lanthanum-doped MCM-48 molecular sieves with different La contents were synthesized hydrothermally and characterized by X-ray diffraction (XRD), nitrogen sorption, transmission electron microscopy (TEM), UV-visible spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. The results show that the majority of…