Materials Literature
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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…
Anodic aluminum oxide (AAO) nanotemplates were completely filled with maghemite nanoparticles by a dip-coating process and their magnetic properties were investigated. Maghemite particles with diameter and stabilized by oleic acid were selectively deposited into AAO pores with diameter. The multiple layers of particle…
ポリ乳酸を電子機器の外装材などに適用するためには高度な難燃性が要求されるので，安全性の高い水酸化アルミニウムとフェノール樹脂類の併用によるポリ乳酸の難燃化を検討した．アルカリ成分量を低減した水酸化アルミニウムを約 50 wt%添加することで，ポリ乳酸を UL94 規格の V-1 レベル(1.6 mm 厚)以上まで難燃化できたが，曲げ強度，曲げ破断ひずみ，耐衝撃性，および流動性が低下した．これに対して，フェノール樹脂類として，着火時のチャーの生成量が多く，しかもポリ乳酸中での分散性の良好な，フェノールノボラック樹脂やトリフェノールメタン樹脂を水酸化アルミニウムと併用した場合，難燃性の改良効果が高いことがわかった．これらのフェノール樹…
In a previous publication we suggested [Huang et al., Macromolecules, 2008, 41, 1745–1752] that looped polymer brushes formed by tethering chains by both ends to a surface may exhibit a polydispersity-like effect due to a distribution of distances between tethering points, leading to segment density profiles dominated…
The reasons for the use of photosensitive polyimides (PSPIs) in semiconductor buffer coating processes and the technical problems associated with such materials have been widely described. The requirements for the further improvement of the pre-established processes and the considerations affecting the design of futur…
The application of Biodegradable Polymer (BDPs), which can serve as biofilm carrier and simultaneously as water insoluble carbon source for heterotrophic denitrification. The external dosing of soluble organic substrate can be therefore avoided and process can be simplified as normal bio-filter. In this paper, the lab…
In this paper, we present the theoretical analysis and the design of cylindrical multilayered electromagnetic cloaks based on the scattering cancellation technique. We propose at first the analysis and the design of bi-layered cylindrical shells, made of homogenous and isotropic metamaterials, in order to effectively…
The generation of macroporous silica structures using a sol–gel process generally requires the presence of high molecular weight, water-soluble polymers. We demonstrate that significantly lower molecular weight poly(ethylene glycol) (PEG) polymers can drive a particle aggregation process to generate macroporous silica…
A functional molecular bridge (named as HBA-TEPIC) (HBA = 1,4-hydroxybenzoic acid, TEPIC = 3-(triethoxysilyl)-propyl-isocyanate) was achieved through the hydrogen transfer nucleophilic addition reaction. Firstly, the molecular precursors coordinate to lanthanide ions (Eu3+ and Tb3+) and then form the covalently bonded…
A family of bis(2-amino-3,5-dihalopyridinium)tetrahalocuprate(II) compounds has been synthesized, including (3,5-diCAPH)2CuCl4 (1), (3,5-diCAPH)2CuBr4 (2), (3,5-diBAPH)2CuCl4 (3), and (3,5-diBAPH)2CuBr4 (4) [3,5-diCAPH = 2-amino-3,5-dichloropyridinium; 3,5-diBAPH = 2-amino-3,5-dibromopyridinium]. These complexes have…