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。
In Crystallization of Polymers, 2nd Edition, published in 2004, Leo Mandelkern provides a self-contained, comprehensive, and up-to-date treatment of polymer crystallization. Volume 2 of this edition provides an authoritative account of the kinetics and mechanisms of polymer crystallization, building from the equilibri…
Diatoms are unicellular algae with plastids acquired by secondary endosymbiosis. They are responsible for approximately 20% of global carbon fixation. We report the 34 million-base pair draft nuclear genome of the marine diatom Thalassiosira pseudonana and its 129 thousand-base pair plastid and 44 thousand-base pair m…
The novel concept of reverse flow operation with reactor side feeding is studied for selective oxidation of NH 3 to produce either N 2, N 2 O, or NO. During normal reverse flow operation, where the feeds are alternately introduced from either end of the reactor, the conversion is always lower when compared to steady s…
In situ time-resolved X-ray diffraction in combination with the Rietveld method was used to study the contraction/expansion behavior of a BaY faujasite zeolite during dehydration and NO 2 adsorption/desorption reactions. The adsorption of water and NO 2 molecules induced a significant contraction of the zeolite unit c…
A method for preparing carbon and SiC macroscopic beads using ion-exchange resins as a macrotemplate that determines the macroshape and the pore structure of the product materials is reported. First, silicates are ion-exchanged into the resins to prevent the resin from collapsing during subsequent carbonization and al…
We prepared disklike tris(4-alkylbutadiynylphenyl)-1,3,5-benzenetricarboxamide and tris[4-(4-alkyloxyphenyl)butadiynylphenyl]-1,3,5-benzenetricarboxamide, where three phenyl diacetylenic and diphenyl diacetylenic groups are connected to a benzene ring through amide linkages, respectively. The structures of self-assemb…
A systematic study on the structural properties and external morphologies of large-pore mesoporous organosilicas synthesized using triblock copolymer EO 20 PO 70 EO 20 as a template under low-acid conditions was carried out. By employing the characterization techniques of SAXS, FE-SEM, and physical adsorption of N 2 i…
We present the results of high-resolution photoluminescence and magneto-optical spectroscopy of selectively doped $\mathrm{Si}∕\mathrm{Si}:\mathrm{Er}$ nanolayer structures grown by sublimation molecular beam epitaxy method. We show that the annealing of such samples results in a preferential formation of a single typ…
We demonstrate that carbon nanotori constructed by either coalescing C 60 molecules along the 5-fold axis (incorporating pentagons and octagons) or by joining the ends of Haeckelite tubes (containing heptagons, hexagons, and pentagons) exhibit large magnetic moments when an external magnetic field is applied. In parti…
Distribution of the probability current and the probability density of wave packets was calculated for nanotubes and nanotube Y junctions by solving the three dimensional time-dependent Schr\"odinger equation for a jellium potential model of the scanning tunneling microscope (STM) tip-nanotube-support system. Four sys…
The reaction between [Pd(2)(dba)(3)] (dba = dibenzylideneacetone), tributylphosphine, and a bis(cycloalkeno)-1,4-diselenin leads to either a mononuclear diselenolene [Pd[SeC(R(1))=C(R(2))Se](PBu(3))(2)] or a dinuclear diselenolene [Pd(2)[SeC(R(1))=C(R(2))Se](2)(PBu(3))(2)] [R(1), R(2) = (CH(2))(n), n = 4, 5, 6] depend…
Models of photogeneration of charge carriers and structural regularities of the photoeffect are analyzed for homologous series of the main classes of photosensitive polymer semiconductors and their donor-acceptor complexes with different sensitizers. The relationship between the chemical structure of polymers and thei…
Frustration verstehen: Eine gezielte Beeinflussung der Struktur durch die Wahl des Templats machte neunkernige Metallräder mit {Cr8Ni}- oder {Cr7(VO)2}-Kernen zugänglich. Magnetismusstudien (siehe Bild) an einem dieser Räder ergaben ein Verhalten als magnetisches Möbius-Band. Diese ersten detaillierten Magnetismusstud…
Trockene Filme: Durch Elektrospinnen wurden Filme mit großen Wasserkontaktwinkeln (166.7°) und kleinen Gleitwinkeln (4.3°) hergestellt. Diese Filme zeigen eine ausgezeichnete superhydrophobe Cassie-Bereichs-Stabilität: Im Bild ist ein selbst nach uniaxialer Belastung mit 400 Pa nicht benetzender Wassertropfen zu sehen.
The surface of the textile fabrics is not absolutely flat and smooth. Its geometrical roughness within certain extents is considerable. The surface roughness influences the fabric hand and it plays a significant role in the end use of the fabric. In parallel, the periodic variations of the fabric surface level due to…
1-Aminocyclopropane-1-carboxylate (ACC) deaminase is a pyridoxal 5'-phosphate (PLP) dependent enzyme catalyzing the opening of the cyclopropane ring of ACC to give alpha-ketobutyric acid and ammonia as the products. This ring cleavage reaction is unusual because the substrate, ACC, contains no abstractable alpha-proto…
The bigger the better: Increasing metal size seems to be the determining factor in the formation of an unprecedented series of homoleptic linear pyrazolates of the heavy alkaline-earth metals (Ca, Sr, Ba, see picture, Ba=green, N=blue, C=black), with the formation of trinuclear calcium, tetranuclear strontium, and hex…
With the help of the equations of motion method for the Green's function, the transition properties of ferroelectric thin films are investigated on the basis of the transverse Ising model. By decoupling the Fermi-type Green's functions to a higher order, the results beyond those of the usual mean-field approximation a…
In this study we present results of an investigation into the reactivity of molecularly chemisorbed oxygen species on a Au/TiO2 model catalyst. We have previously shown that a Au/TiO2 model catalyst sample can be populated with both atomically and molecularly chemisorbed oxygen species following exposure to a radio fr…
X-ray absorption spectroscopy is applied to investigate NaAlH 4 doped with 5 mol % TiCl 3 by ball milling. XANES analysis indicates that after the ball milling Ti species are reduced from Ti (+3) to Ti (0). Release or absorption of hydrogen does not affect the chemical state obtained after ball milling. EXAFS analysis…