Materials Literature
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Side chain liquid crystalline polymer with relatively long spacer was modeled on a semiatomistic level and studied in different liquid crystalline phases with the aid of molecular dynamics simulations. Well equilibrated isotropic, polydomain smectic and monodomain smectic phases were studied for their structural and d…
To study cell attachment to biomaterials, several proteins such as fibronectin, collagen IV, heparin, immunoglobulin G, and albumin have been deposited onto polystyrene adsorbed on a self-assembled monolayer (silane or thiol) on glass or gold, respectively. The different steps of this multilayer assembly have been cha…
Abstract This study examines the effect of various grades of precipitated and ground calcium carbonate on the tensile strength and Charpy impact energy of extruded PVC profile. The results confirm that ultra‐fine precipitated calcium carbonate (pcc) can give rise to large improvements in single notch impact strengths.…
We investigate by molecular dynamics simulations the validity of the frequency-dependent Stokes-Einstein (SE) relation in supercooled liquids at different temperatures. The results indicate that the SE relation holds at intermediate frequencies that correspond to the beta -relaxation and the onset of the alpha -relaxa…
Eine grünere Oxidation: Ein Titan(salalen)-Komplex katalysiert die asymmetrische Epoxidierung aliphatischer (nichtaktivierter) Olefine mit wässrigem Wasserstoffperoxid als Oxidationsmittel. Bei der Umsetzung von endständigen und Z-konfigurierten aliphatischen Olefinen werden die Epoxide in guten Ausbeuten und mit hohe…
Understanding and predicting quantum dots ordering is a central problem for many physical processes. Here, we investigate the mechanisms which govern the self-assembling of Ge dots on nanopatterned vicinal Si substrate. In a first part, we investigate the formation of nanopatterns by self-organization of growth instab…
Abstract To evaluate the effect of compatibilizer on the natural durability of wood flour/high density polyethylene composites against Coriolus versicolor , composites containing 25% and 50% by weight maple wood flour and 1% and 2% compatibilizer (Maleic anhydride polyethylene (MAPE)), respectively, were sampled. Iden…
We study the composition dependence of static and dynamic heterogeneities in simulated ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Si}{\mathrm{O}}_{2}$ melts containing 33.33, 50, and $66.67\phantom{\rule{0.3em}{0ex}}\mathrm{mol}\phantom{\rule{0.2em}{0ex}}%$ ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ in a…
Theoretical investigation of the onset voltage of negative corona on stranded conductors is described in this paper. The method of calculation is based on the criterion developed for the formation of repetitive negative corona Trichel pulses. This calls first for an accurate calculation of the electric field in the vi…
Temperature-dependent field emission characteristics of ZnO nanorods are reported in this study. The work function of ZnO nanorods is notably reduced with the temperature increasing from 100 to 600 K. The electron emission properties of ZnO nanorods are very sensitive to temperature. The turn-on field decreases signif…
Two experimental test programs are conducted to collect data and simulate the dynamic behavior of CuAlBe shape memory alloy (SMA) wires. First, in order to evaluate the effect of temperature changes on superelastic SMA wires, a large number of cyclic, sinusoidal, tensile tests are performed at 1 Hz. These tests are co…
Lipase-catalyzed terpolymerizations were performed with the monomers trimethylolpropane (B3), 1,8-octanediol (B2), and adipic acid (A2). Polymerizations were performed in bulk, at 70 degrees C, for 42 h, using immobilized lipase B from Candida antartica (Novozyme-435) as a catalyst. To determine the substitution patte…
Abstract Porous membranes were fabricated using chitosan and poly( DL ‐lactide) or poly( L ‐lactide) blends through a combinatorial technique. Well‐controlled porous structures could be achieved by optimizing processing conditions. The ductility and toughness of dry porous membranes were improved by incorporating an i…
Self-immolative dendrimers are a unique class of molecules that are able to disassemble upon undergoing a specific triggering reaction through domino-like fragmentations. We have designed and synthesized a novel AB(6) self-immolative dendritic adaptor that amplifies a single cleavage event into the release of six repo…
Abstract High thermal conductivity polyurethane shape memory polymer (SMP) composites filled with aluminum nitride (AlN) were fabricated, and their thermal and thermomechanical properties were studied. The purpose of this microstructure is to improve the thermal properties of the SMPs at low filler content. Morphology…
The mechanical properties of vertical single-crystal ZnO nanowires on ZnO:Ga/glass templates were characterized by nanoindentation experiments in this work. The results from x-ray diffraction and Raman spectra show good crystal quality for the ZnO nanowires. The buckling loads were found to be 1465 and 215 μN for ZnO…
Glancing angle deposition was used to produce approximately 150-nm-thick silver nanoparticle films, which were evaluated as localized surface plasmon resonance (LSPR) biosensors. The films have a strong extinction peak around 368 nm in air due to LSPR. As the refractive index of the surrounding environment is increase…
Abstract The morphology, crystalline behavior, and mechanical and thermal properties of poly( L ‐lactide)/hollow glass beads (PLLA/HGBs) composites were investigated. The incorporation of HGBs enhanced the crystallization rate and crystallinity of PLLA, but slightly decreased its elongation at break. In addition, HGBs…
N-doped, p-type ZnO (ZnO : N) thin films were prepared by magnetron sputtering using NO as the N-doping source. The introduction of Ar in the growth ambient could evidently improve the p-type conductivity and crystal quality of the ZnO : N films, with the lowest room-temperature resistivity of 3.51 Ω cm obtained at an…
Water-soluble CdS nanocrystals (NCs) capped with mercaptoacetic acid (MA) were synthesized in aqueous solution. Hydrogen peroxide directly oxidized the MA-capped CdS NCs and produced strong chemiluminescence (CL) emission in basic conditions. It was found that the CL of CdS NCs was size-dependent, and the CL intensity…