Materials Literature
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The bio-macromolecules are emerging as an important component for minimising energy consumption, waste generation and economic development. In consumer product segments including packaging, health care products, agricultural mulch films and disposable items, these materials have a great request. Polyethylene-lignin lo…
Pseudoelastic NiTi often exhibits an inhomogeneous martensitic phase transformation: Martensite bands propagate through the specimen, distinct phase interfaces separate transformed from untransformed regions, and local strains increase step-like but smoothly by ~5 % across these interfaces. In the present study, we us…
Phosphine ligands bearing 3,4-ethylenedioxythiophene (EDOT) groups, in which a Ph2P group is either connected directly to the thiophene ring [Ph2P(5–EDOT), 1] or to the EDOT ethylene bridge via a methylene (4) or longer (7) ‘spacer’, have been prepared, together with their complexes cis-[MCl2(L)2] (M = Pd and Pt). The…
The effect of Mn doping on optical properties of zinc oxide ZnO has been studied theoretically. The dependence of the Mn concentration and distribution on the optical band gap was investigated at density-functional level applying a hybrid functional. Supercells of varying size were used to model different Mn concentra…
As the most widely utilized technique to determine the 3-dimensional structure of protein molecules, X-ray crystallography can provide structure of the highest resolution among the developed techniques. The resolution obtained via X-ray crystallography is known to be influenced by many factors, such as the crystal qua…
The synthesis and characterization of a new unsymmetrical porphyrin liquid crystal, 5-(4-stearoyloxyphenyl)phenyl-10,15,20-triphenylporphyrin (SPTPPH2) and its transition metal complexes (SPTPPM, M(II) = Zn, Fe, Co, Ni, Cu or Mn) are reported. Their structure and properties were studied by elemental analysis, and UV-V…
Purpose: The 3-omega method is a unique measuring technique which can be applied for thermal conductivity measurements of bulk materials and layers. In order to measure thermal conductivity of semiconducting and metallic materials (e.g. thermoelectric materials) it is necessary to separate the sensor from the substrat…
A circuit theory-based approach for systematically deriving all possible lossless balanced composite right/left-handed transmission lines is described. To illustrate the usefulness of the proposed approach, novel artiflcial transmission line unit-cells with tri- and quad-band behaviour are proposed. It is shown that t…
A mesoporous silica-supported bifunctional Ti-Ru-SBA-15 catalyst with an ordered two-dimensional hexagonal mesostructure was prepared by postmodifying organometallic complexes RuCl2(PPh3)3 and Ti(OiPr)4 onto PPh2-SBA-15. During the tandem addition-isomerization reaction of benzaldehyde under microwave irradiation in a…
A series of electrochemical impedance experiments has been carried out in order to investigate the effect of cell composition and geometry on the determination of electrochemical characteristics of strontium-doped lanthanum cobaltite ͑La 0.6 Sr 0.4 CoO 3-␦ ͒ cathodes.The impedance responses at different electrode pote…
The emerging field of semiconductor spintronics would be dramatically boosted if a semiconductor exhibiting room-temperature ferromagnetism could be found. Here, we discuss the recent stage of research, paying particular attention to the understanding of the observed room-temperature ferromagnetism in the wide-gap sem…
The delayed fracture characteristics of steels are expressed by the relationship between the maximum fracture stress and the hydrogen content at the notch tip of circumferentially notched round bar specimen, where delayed fracture initiates. This material constant is easily obtained by CSRT (Conventional Strain Rate T…
The magnetization process of Nd-Fe-B bonded magnets prepared by the Hydrogenation-Disproportionation-Desorption-Recombination(HDDR) process was studied by observing magnetic domain structures using spin-polarized scanning electron microscopy (spin SEM). The positional relationship between the grain boundaries and the…
A comprehensive study of the photophysical interactions occurring in tris-porphyrin and tetrakis-porphyrin arrays and has been undertaken. The arrays consist of porphyrins with quinoxaline units fused at the beta,beta'-pyrrolic faces of the macrocycle. The linkage geometry is such that these arrays resemble the arrang…
The initial employment of alpha-benzoin oxime (bzoxH2) in metal cluster chemistry has provided access to a new family of decanuclear CuII complexes with a loop or single-strand wheel topology; the CuII10 clusters are antiferromagnetically-coupled with an S=0 spin ground state, as expected for even-membered loop arrays…
This chapter reviews the literature published during 2008 on macrocyclic coordination chemistry. Porphyrin ligands and supramolecular chemistry are not covered in this review which primarily focuses on complexes formed with transition metals and lanthanide ions, although a few examples of s-block, p-block and actinide…
A photoresponsive tandem zinc finger peptide has been synthesized by attaching an azobenzene unit at its N-terminus resulting in a conjugate that retained a high binding ability toward the target DNA sequence, whereas it showed a significant decrease in DNA-binding ability after photoisomerization by UV irradiation to…
The hydrogen absorption and thermal desorption behavior of Ni-Ti superelastic alloy immersed in neutral NaCl and NaF aqueous solutions at 25°C under an applied cathodic potential for 2 h have been systematically investigated by hydrogen thermal desorption analysis. The critical potential for hydrogen absorption is ind…
The new compounds 2,2'-bipyridine-3,3',6,6'-tetracarboxylic acid (bptcH(4)) () and iron(II) [Fe(2)(bptcH(2))(2)(H(2)O)(4)].4.74H(2)O () and [Co(2)(bptcH(2))(2)(H(2)O)(4)].4.5H(2)O () have been prepared and characterized using (1)H NMR, IR and UV-Vis spectroscopic methods. X-Ray structures of these compounds have been…
Filmes de poli(fluoreto de vinilideno), PVDF, na fase ferroelétrica β foram produzidos por diferentes técnicas: cristalização a partir da solução, estiramento mecânico e eletrofiação. Foi verificado por espectroscopia no infravermelho (FTIR) e microscopia eletrônica de varredura (MEV) que filmes obtidos a partir da cr…