Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The crystallographic and magnetic properties of La{0.5+delta}A{0.5-delta}Mn{0.5+epsilon}Ru{0.5-epsilon}O{3} (A= Ca, Sr, Ba) were investigated by means of neutron powder diffraction. All studied samples show the orthorhombic perovskite crystal structure, space group Pnma, with regular (Mn,Ru)O{6} octahedra and no chemi…
Highly (001) oriented thin films of Co2MnSi have been grown on lattice matched GaAs(001) without a buffer layer. Stoichiometric films exhibited a saturation magnetization slightly reduced from the bulk value and films grown at the highest substrate temperature of 689 K showed the lowest resistivity (33 micro.ohm.cm at…
Magnetoresistance (MR) of the Bi$_{2-x}$Pb$_x$Sr$_2$Co$_2$O$_y$ ($x$=0, 0.3, 0.4) single crystals is investigated systematically. A nonmonotonic variation of the isothermal in-plane and out-of-plane MR with the field is observed. The out-of-plane MR is positive in high temperatures and increases with decreasing $T$, a…
The original charge flipping algorithm [Oszlanyi & Suto (2004). Acta Cryst. A60, 34-141] is an amazingly simple structure solution method which works ab initio on high-resolution X-ray diffraction data. In this paper, a new version of the algorithm is presented that complements the phase exploration in reciprocal spac…
Applications of computer-based group-theoretical methods to perovskite crystallography are reviewed. Such methods furnish a systematic account of the effects on the high-symmetry parent structure of diverse distortions. New results are presented for elpasolites (ordered double perovskites) when both ferroelectric cati…
A new triphenylamine-containing aromatic diamine, N, N -bis(4-aminophenyl)- N ‘, N ‘ -diphenyl-1,4-phenylenediamine, was synthesized from the amination reaction between 4-aminotriphenylamine and 4-fluoronitrobenzene and subsequent reduction of the dinitro intermediate. A series of novel aromatic poly(amine-imide)s wit…
Anodes of elemental carbon may be discharged in a galvanic cell, using molten carbonate electrolyte, at power densities of 40-100 mW/cm 2 . We report cell polarization, surface area, primary particle size, and crystallization index for nine particulate carbon samples derived from fuel oil, methane, coal, biochar, and…
Nanocrystalline metal oxides can be prepared with large surface area, electrochemical stability, and pseudocapacitive behavior, being able to be used as supercapacitor electrodes. Among the various metal oxides studied, amorphous and hydrated manganese oxide is the most promising for supercapacitor electrodes due to t…
Abstract This paper describes a novel technique to produce cellulose microfibrils through mechanical methods. The technique involved a combination of severe shearing in a refiner, followed by high-impact crushing under liquid nitrogen. Fibers treated in this way were subsequently either freeze-dried or suspended in wa…
A novel intracellular pH-sensitive polymeric micelle drug carrier that controls the systemic, local, and subcellular distributions of pharmacologically active drugs has been developed in this study. The micelles were prepared from self-assembling amphiphilic block copolymers, poly(ethylene glycol)-poly(aspartate hydra…
This review summarises the key topics in the field of self-cleaning coatings, concentrating on the materials that have been used in commercial applications and recent research that aims to improve these materials. Hydrophobic and hydrophilic coatings are discussed, and the various mechanisms of self-cleaning are descr…
The incorporation of the doping element Na as well as the impact of this element on the structural, morphological and optical properties of evaporated CuInS2 films on Corning 7059 glass substrates is studied. The element Na was evaporated from a thermal evaporation source. The amount of the Na source was determined to…
Abstract The mechanical and electrical response of Pb (Mg 1/3 Nb 2/3 )‐ O 3 –PbTiO 3 single crystals to micro‐indentation are investigated using the newly developed low frequency scanning probe acoustic microscopy which is based on the atomic force microscope. There are three ways to release the stress produced by ind…
Funktionell und extern steuerbar sind elektroaktive Nanostrukturen, die durch Selbstorganisation von ionischen Bausteinen entstehen. Die kolumnaren Strukturen (siehe Bild) bestehen aus rechteckigen Oligoanilin-Baueinheiten und Phosphattensiden mit zwei Kohlenwasserstoffketten. Beim Erhitzen bricht die Ordnung der tetr…
Konformationsabhängige Farbeinstellung: Ausgehend von aryloxysubstituierten Perylenbisimiden wurden für drei unterschiedliche Brückenlängen jeweils zwei isomere diagonal (A) und lateral (B) überbrückte Makrocyclen synthetisiert (siehe Bild). Diese Isomere weisen unterschiedliche konformative Eigenschaften auf und könn…
Einen großen Stromtransport und eine ähnlich schnelle Diffusion wie in Flüssigkeiten bietet eine farbstoffsensibilisierte Solarzelle (dye-sensitized solar cell, DSSC), die den plastisch-kristallinen Elektrolyt Succinonitril und das Redoxpaar I−/I3− enthält (siehe Graph). Nach diesem Modell könnten echte Feststoff-DSSC…
Die Entfernung flüchtiger organischer Verbindungen (VOCs) gelingt besonders effizient mit einem dreidimensionalen mesoporösen Chromoxid (siehe Bild). Unter Umgebungsbedingungen wirkt das Material als selektives Sorbens für VOCs (z. B. Toluol), bei höheren Temperaturen ist es dagegen ein effektiver und selektiver Katal…
The surface quality of coronary stents has a significant influence on its biocompatibility. Therefore, surface polishing is of paramount importance in the production and application of stents. In the present study, electropolishing is performed on 316LVM steel slotted tube coronary stents. Additionally, acid pickling,…
Cr and Mo tetracarbonyl complexes bearing the diimine ligand N,N′-bis(ferrocenylmethylene)ethylenediamine (FcNN) have been prepared from the ligand and M(CO)6. Two isomeric forms of (FcNN)Mo(CO)4, corresponding to the cis,cis and cis,trans geometries with respect to the CN bonds of the free ligand, were shown to exist…
Reaction of Ce(III) with lacunary versions of [H(4)XW(18)O(62)](7-) (X = P, As) yields the 1:2 complexes [Ce(H(4)XW(17)O(61)](19-) (X = As, 1; P, 2) in good yield, characterized in solution and the solid state by NMR spectroscopy and X-ray crystallographic analysis, respectively. The structures confirm a syn C(2) conf…