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。
This work reports the synthesis of new polymer-titania hybrids, where the organic phase is constituted by polyesters such as poly(-caprolactone), poly(d,l-lactic acid), and poly(l-lactic acid). In these hybrids, very strong interaction between the organic and inorganic domains is obtained through transesterification o…
In the present study, the results of the numerical implementation of a mathematical model of a planar anode-supported SOFC are reported. In particular, model results are validated and discussed when the fuel is a mixture of hydrogen and carbon monoxide, focusing on the importance of simulating direct oxidation of carb…
The new compounds K(2)Ln(2)As(2)Se(9) (Ln = Sm, Gd) were obtained by applying the reactive flux method. The structure consists of a three-dimensional (3D) [Ln(2)As(2)Se(9)](2-) framework with K(+) ion-filling tunnels running along the b axis. The two unique Ln(3+) cations are coordinated by two Se(2)(2-) dumbbells, tw…
Abstract Pepped up polymers : The synthesis and properties of novel chiral cyclic peptides designed to complex with suitable polymers through hydrogen bonding are described. A substituted cyclic peptide self‐assembles into supramolecular nanotubes and develops noncovalent interactions with poly(vinyl alcohol) (PVA) by…
Circular permutation of a protein covalently links its original termini and creates new ends at another location. To maintain the stability of the permuted structure, the termini are typically bridged by a peptide long enough to span the original distance between them. Here, we take the opposite approach and employ a…
Hollow surface-structured silica microspheres, a potential candidate for drug delivery systems, were synthesized using the rape pollen grain as a biotemplate via a facile sol-gel coating followed by a calcination process. Different surface morphologies relating to the controllable release property were also achieved o…
We study shear-induced gelation in a microchannel without adding any salt, for a polymer colloid that is fully stable under stagnant conditions. The initial stability is achieved by negative charges from the polymer chain end groups. Then, sulfonate surfactants are added to the system. The surfactant adsorption is cha…
A simple strategy to fabricate stimulus-responsive patterned PNIPAAM-brush microstructures (‘anemones’) is presented. The size of the microstructures can be adjusted by setting the composition of thiol and the contact pressure. We demonstrate that the patterned PNIPAAM-brush microstructures have a triggerable and reve…
Heterogeneous conducting polymer nanostructures are fabricated using a newly developed method. Completely isolated nanowires of several conducting polymer materials can be fabricated side-by-side with perfect registry to each other on a rigid or flexible substrate. Results of a chemical sensing study using PPY and PED…
Tough and soft: Highly porous, spongelike materials self-assemble by calcium ion condensation of DNA-wrapped carbon nanotubes (SWNTs-DNA; see picture, IL = ionic liquid). The toughness, modulus, and swellability of the electrically conductive sponges can be tuned by controlling the density and strength of interfiber j…
The work function of a model degenerately doped organic semiconductor p-doped poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) can be systematically tuned over an eV-wide range by exchanging excess matrix protons with spectator cations, without altering the organic semiconductor doping level or polaron dens…
The dynamics of energy transport along rigid rod conjugated polymer--poly(p-phenylenebutadyine)--chains is modeled with a special emphasis on the role of conformational disorder. A simple random growth algorithm based on torsion potentials with increasing stiffness yields polymer chains with increasing degree of conju…
Hybrid power systems based on high temperature fuel cells are a promising technology for the forthcoming distributed power generation market. For the most extended configuration, these systems comprise a fuel cell and a conventional recuperative gas turbine engine bottoming cycle, which recovers waste heat from the ce…
Poly(vinyl alcohol) (PVA) has a wide application in industry and the biomedicine area, but its poor water resistance and insufficient mechanical strength have severely limited its application. To overcome these limitations, in this study, inorganic silica sol was used to modify organic PVA. The tensile results show th…
This study analyses theoretically the effects of substitutional N on three different chemical vapor deposition diamond growth steps. The investigation is based on density functional theory, using both cluster and periodic models. The reaction steps, assumed to be predominantly occurring during diamond growth, are (i)…
Abstract Wahl der Nachbarn : Cluster mit 60, 44 und 36 Uranylperoxidhydroxid‐Polyedern (siehe Bild) nehmen Fullerentopologien von maximaler Symmetrie an. Der größte Cluster, U60, ist topologisch identisch mit C 60 (keine benachbarten Fünfecke, höchstmögliche Symmetrie). U44 hat eine Topologie mit maximaler Symmetrie a…
In this work, we studied the catalytic activity of commercial alumina, and laboratory-synthesized alumina doped with Lewis acid metals, in the epoxidation of methyl oleate with aqueous hydrogen peroxide. It was observed that the reaction yields increased when the amount of catalyst, the quantity of hydrogen peroxide,…
Because the traditional storage of methane in the condensed state in high-pressure vessels is rather dangerous, and to store a large amount of gas using adsorbents is impossible at normal ambient conditions, we have developed a nanocapsule, which combines the advantages of a high-pressure vessel and adsorbents--a larg…
A series of 6-substituted and 5-fluoro-6-substituted uridine derivatives were synthesized and evaluated for their potential as anticancer agents. The designed molecules were synthesized from either fully protected uridine or the corresponding 5-fluorouridine derivatives. The mononucleotide derivatives were used for en…
Supramolecular chirality in two configurational homoaggregates of anionic meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) can be induced by D- and L-alanine in acidic water (see picture). The chirality can be further memorized and enforced through strong electrostatic interactions between TPPS aggregates and achiral…