Materials Literature
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The identification of strategies to assemble nanostructured films with engineered properties on solid supports can lead to the development of innovative functional materials. In particular, the self-assembly of electroactive multilayers from simple molecular building blocks on metallic electrodes can offer the opportu…
The study presented here consists of three parts. In the first, the ability of a set of differently substituted diazobenzene-based linkers to act as photoswitchable beta-turn building blocks was assessed. A 12-residue peptide known to form beta-hairpins was taken as the basis for the modeling process. The central (bet…
Methods of fabricating negative and bifocal microlens arrays have been demonstrated in this paper. The technique of photoresist molding using a sapphire positive lens template was used for the patterning of negative microlenses, while the bifocal microlens arrays were fabricated using a two-step etch process. In both…
Based on the nanothermodynamical approach, we performed the thermodynamical predictions of nanodiamonds synthesized by pulsed-laser ablation in liquid. The nanothermodynamical analyses showed that the formation of nanodiamonds with sizes of 3–5 nm would be preferable to that of large nanodiamonds in the pressure-tempe…
Die reversible Photoumwandlung selbstorganisierender photochromer Dithienylcyclopenten-Schalter zwischen einem aggregierten und einem nichtaggregierten Zustand zeigt sich auf makroskopischem Niveau als vollständig reversibler Sol-Gel-Phasenübergang und hat in einem inhomogenen optischen Feld eine räumlich beschränkte…
Mesoporous crystalline ZnO nanowires have been successfully fabricated by a simple in situ precipitation method combined with porous anodic alumina membranes as the templates. XRD, TEM, and HRTEM analysis shows that the as-synthesized samples are mesoporous ZnO nanowires with a hexagonal structure, which consist of Zn…
Abstract In this work, we studied the adsorption capacity of boron nitride (BN) for fluoropolymer and polyethylene (PE) to gain a better understanding of the interactions and the performance of BN and fluoropolymer, and their combinations as processing aids in the extrusion of Ziegler‐Natta PEs. We found that BN has a…
Abstract The chemical modification of low‐density polyethylene (LDPE) resins with hexamethylene diisocyanate and toluene diisocyanate was achieved. The reaction of LDPE with diisocyanate was monitored by Fourier transform infrared spectroscopy, wherein the appearance of new peaks at 3326, 1620, and 1572 cm −1 correspo…
Abstract The wet air oxidation of phenol over a commercial active carbon catalyst was studied in a trickle bed reactor (TBR) in the temperature and oxygen partial pressure ranges of 120–160 °C and 0.1–0.2 MPa, respectively. The performance of the active carbon was compared in terms of phenol and COD destruction. The w…
Foams represent an important class of structured liquids of relevance to a wide range of industries. Their quality is mostly determined by their complex cellular structure, which defines primarily their texture and to a large extent their rheology and stability. The foam structure is influenced not only by the formula…
The recently discovered tellurium-doped silicon clathrates, Te7+xSi20-x and Te16Si38, both low- and high-temperature forms (cubic and rhombohedral, respectively), exhibit original structures that are all derived from the parent type I clathrate G8Si46 (G = guest atom). The similarities and differences between the stru…
The compound YBaMn 2 O 5.5, having only Mn 3+, has been prepared by carefully oxidizing/reducing YBaMn 2 O 5 /YBaMn 2 O 6 . We have determined its crystal ( Icma, a ≈ 8.161, b ≈ 7.546, c ≈ 15.279 Å) and magnetic (collinear antiferromagnetic) structures using neutron powder diffraction as a function of temperature. The…
Dielectric relaxation measurements were performed on a series of poly(di- n -alkylitaconate)s with various side-chain lengths. The experimental data were analyzed by adjustment with one or the sum of several Havriliak−Negami functions. They demonstrated the existence of several relaxation processes with significant di…
I explore the polarization characteristics of a wire-grid polarizer operating in a rotating platform using well-established rigorous coupled-wave analysis. The results show that the performance of a wire-grid polarizer evaluated in transmittance and extinction ratio is substantially degraded with rotation, although it…
We report a method for fabricating ordered spatial arrangements of pre-synthesized CdS nanoparticles in thin block copolymer templates by first selectively dispersing these nanoparticles in one particular block of a diblock copolymer, in bulk, by means of dipole–dipole interactions and then using solvent selectivity t…
Säurespezifische Konformationsänderungen: Die Protonierung von meso-Aryl-substituiertem Rubyrin 1 mit HCl und CF3CO2H bewirkt unterschiedliche Konformationsänderungen, wie die Verschiebungen der UV/Vis-Absorptionsbanden relativ zu denen der freien Base belegen (Cl−: Blauverschiebung; CF3CO2−: Rotverschiebung). Die deu…
Two-dimensional correlation spectroscopy has been applied to study PMPCS (poly{2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene}), a representative example of mesogen-jacketed liquid crystalline polymers. With the precise analysis of a series of Fourier transform infrared (FTIR) spectra of PMPCS recorded at varied tempera…
Spinel cobalt ferrite in the form of nearly spherical particles, having a narrow range of particle size around 7.6nm, was produced by forced hydrolysis. Between the magnetization blocking temperature of 180K and the Mössbauer blocking temperature of 270K, the magnetic anisotropy energy decreases rapidly with temperatu…
The dielectric properties of tantalum-doped BaTi 0.85 Zr 0.15 O 3 were investigated. The conventional solid-state reaction method was used to make the ceramic samples. The composition was close to the pinch point of the three structure phase transitions in BaTiO 3 . Powder X-ray diffraction results indicated that the…
A stereoregular poly(phenylacetylene) bearing the aza-18-crown-6 ether as the pendant (poly- 1 ) formed a predominantly one-handed helical conformation upon complexation with optically active bis(amino acid)s such as l -homocystine perchlorate ( l - 2 ) in acetonitrile, and the complex solution gradually gelled with t…