Materials Literature
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Experiments to continuously separate Fe–Al–Zn dross phase from hot dip galvanising zinc melt were conducted on a laboratory scale apparatus by using high frequency alternating magnetic field. Effects of processing time ( t) on separation efficiency were investigated. The experimental results show that using the electr…
Colloidal particles with appropriate wetting properties can become very strongly trapped at an interface between two immiscible fluids. We have harnessed this phenomenon to create a new class of soft materials with intriguing and potentially useful characteristics. The material is known as a bijel: bicontinuous interf…
The chalcogenide glass is known to exhibit prominent anisotropic deformations when illuminated by linearly-polarized bandgap light. We report new deformation phenomena for As 2 S 3 . We also propose that many deformation phenomena can be accounted for by an optical force model.
Das Verhalten der Oxidschicht von Zirkonium-basierten Brennstabhüllrohren unter Dampfmangelbedingungen Es werden die Ergebnisse von Dauerglühversuchen mit voroxidierten Zircaloy-Hüllrohren in Inertgasatmosphäre bei Glühtemperaturen zwischen 1250 und 1500 °C und ein entsprechendes Modell dargestellt. Ziel der Tests war…
Experimental results indicated that ozone transfer in the rotating packed contactor was noticeably greater than in a traditional packed-bed contactor under similar operational conditions. Ozonation in the rotating packed contactor has been shown to be feasible for achieving nearly complete decomposition of o-cresol wi…
AIMS: The purpose of this study was to investigate the reinforcement effect of short E-glass fiber fillers on some mechanical properties of temporary crown and bridge (TCB) composite resin with a semi-interpenetrating polymer network (semi-IPN). METHODS AND MATERIALS: Experimental temporary fiber reinforced (TFC) comp…
Computerized three-dimensional X-ray microtomography is capable of revealing the internal structure and some of the material properties of pearls at high resolution, and is thus a more useful tool in pearl testing than conventional X-ray radiography. Differences in transparency to X-rays (radiodensities) can be detect…
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We report the synthesis and characterization of organosiloxane 2-phenylpyrimidine mesogens with chiral (R,R)-2,3-difluorooctyloxy side-chains. These compounds form chiral SmA* and SmC* phases, and show remarkable electro-optical and alignment properties as surface-stabilized ferroelectric liquid crystals, including on…
Based on a model for size-dependent atomic cohesive energy of nanocrystals, a simple and unified model, without any adjustable parameter, has been established for finite size effect on shifts of valence and conduction band edges [DeltaEV(D) and DeltaEC(D)], and bandgap expansion [DeltaEG(D)| of semiconductor nanocryst…
Thin chitosan–carbon nanoparticle films (ca. 2 nm average thickness increase per layer) are assembled onto tin-doped indium oxide (ITO) electrode substrates in a layer-by-layer deposition process employing carbon nanoparticles of ca. 8 nm average diameter and an aqueous solution of chitosan (poly-D-glucosamine, low mo…
Using a nonequilibrium Green's function approach, quantum simulations are performed to assess the device characteristics for cross-plane transport in Si/Ge/Si-superlattice thin films. The effect of quantum confinement on the Seebeck coefficient and electrical transport and its impact on the power factor of superlattic…
Cyclic thermal loading causes thermal gradients near the loaded surfaces, which are responsible for the development of cyclic strains and mechanical stresses in the sample that subsequently cause accumulated damage. The stress state changes during thermal fatigue loading if plastic strains occur. Most relevant are the…
This paper describes various studies undertaken to devise a deposition cycle for the formation of , a phase-change memory material, by electrochemical atomic layer deposition (EC-ALD). The importance of deposition potentials to the formation of deposits of Sb and Te, were investigated. The resulting potentials were th…
Heterobimetallic molecular precursors [Ti(4)(dmae)(6)(mu-OH)(mu-O)(6)Cu(6)(benzoate)(9)] (1) and [Ti(4)(dmae)(6)(mu-OH)(mu-O)(6)Cu(6)(2-methylbenzoate)(9)] (2) were prepared by the interaction of Ti(dmae)(4) [dmae=N,N-dimethylaminoethanolate] with Cu(benzoate)(2).2H(2)O for (2) and Cu(2-methylbenzoate)(2).2H(2)O for (…
Nanostructures including nanohole and metal dot arrays were fabricated by hybrid processes combing self-assembled diblock copolymer and conventional semiconductor processes. The interfacial energy between polystyrene-b-polymethylmetacrylate (PS-b-PMMA) diblock copolymer and substrate surface was controlled by employin…
The use and commercial potential of engineered nanomaterials is increasing, but questions of occupational and public health safety remain. Here, we review research published in 2007 concerning toxicology of nanomaterials. Articles were selected from the Medline Pubmed database, published or pre-published during 2007,…
The structure of a self-assembled system containing a protonated dipyrromethene with deprotonated/reduced dichlorodicyanoquinone (DDQ) was determined by X-ray diffraction analysis. The assembly exhibits a highly hydrogen-bonded structure, with an unusual asymmetric conformation for the dipyrromethene.
Lithium ferrite was prepared by the thermal decomposition of three polynuclear complex compounds containing as ligands the anions of malic, tartaric and gluconic acid: (NH4)2[Fe2.5Li0.5(C4H4O5)3(OH)4(H2O)2]?4H2O (I), (NH4)6[Fe2.5Li0.5(C4H4O6)3(OH)8]?2H2O (II) and (NH4)2[Fe2.5Li0.5(C6H11O7)3(OH)7] (III). The polynuclea…
Micro- and mesoporous materials molecular sieves have been synthesized at neutral pH and room temperature using a mimic of “silicatein” for mobilizing the silica. This methodology allows preparing molecular sieves materials in where less stable molecules can be encapsulated, leading to a final material with potential…