Materials Literature
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Silver nanostructured thin films stabilized by 2,2′-dithiodipyridine (2dtpy) were prepared. The Ag nanoparticles were obtained by treating the complex [Ag(2dtpy)]NO3 with NaBH4 in a methanol–toluene mixture. The films were transferred to borosilicate glass slips by a dip-coating method and were found to consist of Ag…
The crystal chemical features and occurrence of the new orthoamphiboles (space group Pnmn), protoferro-anthophyllite and protomangano-ferro-anthophyllite, are described. Protoferro-anthophyllites (PFA) are found in fayalite masses from granitic pegmatites at Cheyenne Canyon and Cheyenne Mountain, Colorado, U.S.A. and…
Properties of needlepunched nonwoven fabrics that are used for automotive applications have been investigated by blending thermoplastic fibers under various needling parameters. Higher tensile and bursting strength were achieved by introducing lower modulus nylon 6,6 fibers into the PET substrate. Increased bursting s…
Espumas sintáticas são materiais cujas células são formadas por esferas ocas, de vidro ou poliméricas, com diâmetros na faixa de 10 a 100 µm. A utilização de Glass BubblesTM para a obtenção de espumas sintáticas de polipropileno é uma opção para obter material de baixa densidade sem grande perda de propriedades mecâni…
An alternative method for the hardening of steel parts has been developed as a means of providing steel products with superior mechanical properties through development of high residual compressive stresses on the part surface, and involves the application of intensive quenching during heat treatment. This processing…
Dielectric measurements on four samples composed of bent-shaped molecules with the same basic structure were carried out. They differ only in the position of one fluorine atom in the central core. Two relaxation ranges were detected: the fast reorientation about the long axes and a slow collective process. In three ca…
Titanium aluminides [L10-TiAl (Ti0.50Al0.50 and Ti0.40Al0.60), TiAl2 and D022-TiAl3] have been mechanically ground (MG) in an argon atmosphere. In addition, hydrogen absorption and desorption properties of the MG-alloys have been investigated. Hcp- and amorphous (a-) TiAl, fcc- and a-TiAl2 and fcc-TiAl3 are formed by…
The thermal expansion behaviors of the porous and dense spinel bodies, and the cathode with the spinel in high temperature solid oxide fuel cells have been investigated during a thermal cycle measurement in an atmosphere. The porous body with relative density of 81% showed a large expansion at temperatures between 101…
Nanosecond time‐resolved Raman spectroscopy has been performed to study polymer films, polytetrafluoroethylene (PTFE), under laser driven shock compression at laser power density of 4.0 GW/cm2. The CF2 stretching mode line of PTFE showed a higher shift (18 cm−1) at delay time of 9.3 ns due to the shock compression and…
The nanometer particles of TiO2 and TiO2/SiO2 oxides were prepared by sol-gel and supercritical fluid drying method.The properties of TiO2 and TiO2/SiO2 were characterized by means of BET(Brunner-Emmett-Teller method), TEM(transmission electron microscopy), SEM(Scanning electron microscopy), XRD(X-ray differaction) an…
Phase transformation behavior, the shape memory characteristics and the superelasticity of Ti–Ni–Cu–Mo alloys have been investigated by means of electrical resistivity measurements, X-ray diffraction, thermal cycling tests under constant load and tensile tests. A fully annealed Ti–44.7Ni–5Cu–0.3Mo alloy transformed in…
Rapid-solidification method was applied to make the Fe-15 at%Ga ribbon whose thickness was about 100 μm with improvement of ductility. The Fe-15 at%Ga ribbon sample showed a very large magnetostriction of εmax=−400×10−6 in comparison with εmax=−40×10−6 for the conventionally melt-worked bulk material at applied magnet…
The following topics are dealt with: Ethernet and WDM technology; package electrical characterization; flip chip packaging; solder technology; reliability and test; modules; materials, transceivers and interconnects; power and EM modeling; flip-chip underfills; reliability and stress; integrated and on-chip passives;…
Na 2 Ln 2 Ti 3 - x Mn x O 10 (Ln = Sm, Eu, Gd, and Dy; 0 ≤ x ≤ 1), a new series of triple-layer Ruddlesden−Popper phases, were synthesized by direct solid-state reaction. The smaller lanthanides enhance manganese solubility in the parent titanate, and an optimized synthetic approach allows Na 2 Ln 2 Ti 3 - x Mn x O 10…
酢酸パラジウム (II) と液晶性分子である4-シアノー4'-ペンチルビフェニル (5CB) のテトラヒドロフラン溶液を紫外線照射することにより, 5CBで保護されたパラジウム (5CB-Pd) ナノ粒子の分散液の調製に成功した. 得られた5CB-Pdナノ粒子は, 透過型電子顕微鏡観察により, 平均粒径1.9nm, 標準偏差1.2nmの比較的均一な大きさの球状粒子であった. 5CB-Pdナノ粒子を二色性色素 ((株) 日本感光色素研究所, G241) とともに, ホスト液晶 (メルクジャパン (株), ZLI2806) に添加し, ゲストーホストモード液晶セルを作製した. 5CB-Pdナノ粒子のホスト液晶に対する相溶性は高く, 液…
Introduction The advantages of high energy density, easy availability and safe handling/storage are now making methanol one of the most promising sources of hydrogen for fuel cell systems. While extensive work has been done for decades on how to synthesize methanol, recent research is now concentrating on how to produ…
Summary A line of cosmeti c produc ts of interest fo r de nta l a nd oral applications has been prepared with N carboxymethyl chitosan, endowed wi th bioche mical a nd microbiol ogica! sig nifi cance. Moreover, a systemati c survey of the use of N-carboxymethyl chitosan in emul sions has been made, and a n after sun…
In order to obtain liquid crystalline comb-like poly(L-lysine) bearing biphenylyl mesogenic groups in their side chains, we synthesized the 11-(biphenyl-4-carboxamido)undecanamidoL-lysine (KC10φφ) from L-lysine by a five step procedure and transformed the KC10 φφ into its polymerizable cyclic derivative (the N-carboxy…
Since lead contaminates the environment, the various types of shape-controlled-sulfide (SCS) free machining steel, in which sulfide shapes are controlled to be spherical, have been developed to replace the leaded ones. However, in these SCS free machining steels, the effect of aspect ratio, size, and composition of su…
ADVERTISEMENT RETURN TO ISSUEPREVCommentComment on "Lattice Contraction and Surface Stress of fcc Nanocrystals"J. WeissmüllerView Author Information Forschungszentrum Karlsruhe, Institut für Nanotechnologie, D-76021 Karlsruhe, Germany and Universität des Saarlandes, Technische Physik, Saarbrücken, Germany Cite this: J…