Materials Literature
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Biomimetic synthesis is emerging as an advantageous alternative to the harsh synthetic conditions traditionally used in metal oxide syntheses techniques. Silaffins, proteins from the C. fusiformis diatom, form silica in an aqueous environment under benign conditions. Amine terminated PAMAM and PPI dendrimers are effec…
In this study, the preparation of some novel metallophthalocyanine (MPcs) complexes substituted with octakis(mercaptopropylisobutyl-POSS) functional group was achieved. By the reaction of [1-(3-mercapto)propyl-3,5,7,9,11,13,15-isobutylpentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxane 1 with 4,5-dichloro-1,2-dicyano…
Under UV irradiation in acetonitrile, acyl(allyl)silanes undergo an intramolecular (2+2) cycloaddition (Paternò-Büchi type reaction) to give unprecedented 1-alkyl-6-oxa-2-silabicyclo[2.2.0] hexanes.
Surface mediated phenomena are important in controlling the magnetism of nanocrystals. Here, we provide a versatile chemical method which allows the formation of EuS nanocrystals encapsulated in poly(styrene) (PS). These materials are the first example of a polymer based EuS nanocomposite prepared in situ. Besides the…
A computational fluid dynamics model is developed to study the steady-state behavior of a microtubular solid oxide fuel cell ͑SOFC͒.The model incorporates mass, momentum, species, and heat balances along with ionic and electronic charge transfers.The anode-supported SOFC studied in this work consists of a ceria-based…
Thermoplastic vulcanizate (TPV) is a special class of thermoplastic elastomers (TPEs) made of a rubber/plastic polymer mixture in which the rubber phase is highly vulcanized. It is prepared by melt mixing a thermoplastic with an elastomer and by in situ crosslinking of the rubber phase. Currently, TPV is replacing EPD…
A small molecule of N,N′,N″-tris(3-methylpyridyl)-trimesic amide was assembled into a novel hexagonal microtube through intermolecular hydrogen bonds, and simultaneously formed a gel system in H2O–THF mixed solvent. Tuning gelator concentration or the preparation method can effectively control the size of the hexagona…
An ingrowing toenail has no definitive treatment. Previously, effective methods were complicated but easy ones had less effect. We show both an easy and an effective way with Cu-Al-Mn-based shape-memory alloys (SMAs). They have a characteristic shape which patients themselves can detach easily without any pain. But th…
The states of tris(8-quinolinato)aluminum(III) (Alq3) adsorbed in mesoporous silicas with different pore sizes (2.5, 3.1 and 5.0 nm) were investigated. Alq3 was successfully occluded into the mesoporous silicas from solution and the adsorbed amount of Alq3 per BET surface area was effectively controlled by changing th…
Synergy between Brønsted acid sites and Lewis acid sites in mesoporous Al-Zr-TUD-1 was demonstrated to exist in Brønsted acid catalysed reactions, but not in Lewis acid catalysed reactions.
ZnO nanoporous structures were prepared on indium-tin-oxide substrates by cathodic electrodeposition at low temperature without using any surfactant. The morphology and structure of the films were studied, and the mechanisms for the formation of the porous structures were also discussed. Dye-sensitized solar cells bas…
Three 1D Ln(III) - disulfide complexes [Dy(2,2′-DTDN)1.5(DMSO)3]·H2O (1), [Nd(2,2′-DTDN)1.5(DMSO)3] (2), and [Eu(2,2′-DTDN)1.5(DMSO)3]·H2O (3) (DTDN = dithiodinicotinate) have been synthesized and characterized with single-crystal X-ray diffraction analysis. The ligand dithiodinicotinate was generated in situ by two m…
Self-assembled polypeptide−surfactant complexes are usually infusible solids in the absence of solvent and do not allow fluidlike liquid crystallinity even when heated, which seriously limits their polymer-like applications in the solid state due to processing problems. This work is partly inspired by nature's liquid…
Abstract The conception and first results for a newly established project at the Center of Excellence for Polysaccharide Research in Jena are described. The work is focused on the investigation of new cellulose solvents and activating agents. Besides the use of a variety of Ionic Liquids it is the interaction of carbo…
A brief review is given on electronic and transport properties of monolayer graphene from a theoretical point of view. The topics include the effective-mass description of electronic states, topological anomaly associated with Berry's phase, singular diamagnetic susceptibility, zero-mode anomalies and their removal du…
A species of marine diatom, Toxarium undulatum, has emerged as a problematic biofouler of contemporary environmentally benign marine coatings. Previous analyses by atomic force microscopy (AFM) showed the cell-substratum adhesive of this alga contained macromolecules with a modular protein backbone assembled into nano…
Abstract . The Jiles-Atherton model is widely applied in the description of hysteresis in ferromagnetic, ferroelectric, magnetostrictive and piezoelectric materials, however the estimation procedure for recovery of its parameters may be troublesome for potential users. In the paper the issues related to the estimation…
More than one thousand photochemistry papers were published in the most cited twenty-four scientific journals in 2007. With nanosecond, picosecond, and femtosecond laser techniques widely applied, detection of reactive intermediates, products of chemical bond dissociation, isomerizations, rearrangements, as well as th…
We study the electronic and magnetic properties of the quinternary full Heusler alloys of the type Co-2[Cr1-xMnx][Al1-ySiy] employing three different approaches: (i) the coherent potential approximation; (ii) the virtual crystal approximation; and (iii) supercell calculations. All three methods give similar results, a…
A new deembedding method in permittivity measurement of ferroelectric thin film material is proposed in this paper. By measuring the two scattering matrixes of the two samples with different length, the propagation constant of the actual network under test (ANUT) can be obtained. Further more, the permittivity would b…