Materials Literature
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We have prepared VO2 thin films epitaxially grown on TiO2(001) substrates with thickness systematically varied from 2.5 to 13 nm using a pulsed laser deposition method, and studied the transport property and electronic states of the films by means of resistivity and in situ synchrotron photoemission spectroscopy (SRPE…
Several measures of aromaticity including energetic, magnetic, and electron density criteria are employed to show how aromatic stabilization can explain the stability sequence of hydroporphyrins, ranging from porphin to octahydroporphin, and their preferred hydrogenation paths. The methods employed involve topological…
Obtaining single crystals for X-ray diffraction remains a major bottleneck in structural biology; when existing crystal growth methods fail to yield suitable crystals, often the target rather than the crystallization approach is reconsidered. Here we demonstrate that polymer-induced heteronucleation, a powerful techni…
A generalized hybrid nanofabrication approach is reported that combines top-down (deep-UV lithography) and bottom-up (controlled lateral epitaxial growth) fabrication techniques for developing nanostructured platforms. This technology allows the development of reproducible substrates with controlled sub-10-nm gaps bet…
Because of their extraordinary brightness and photostability, quantum dots (QDs) have tremendous potential for long-term, particle tracking in heterogeneous systems (e.g., living cells, microfluidic flow). However, one of their major limitations is blinking, an intermittent loss of fluorescence, characteristic of indi…
In this study, secondary sludge (SS) from a kraft paper mill was used as a source of biomass to recover protein and investigate its potential use as a wood adhesive. The process of protein recovery involved disruption of the floc structure in alkaline medium to disintegrate and release intercellular contents into the…
Abstract The flame‐retarded systems consisting of triphenylphosphate (TPP) and nano‐poly(phenylsilsesquioxane) spheres (nano‐PPSQ) for poly(methyl methacrylate) are reported. The flame‐retarded effects were studied by a cone calorimeter test and thermal gravimetric analysis (TGA). The results show that when a part of…
Abstract The crystallization behavior of polychloroprene rubber (CR) has been studied in this work. Differential scanning calorimetry (DSC) was applied to characterize the crystallization behavior. And X‐ray diffraction was applied to determine the impact of crosslinking on the crystallization of CR. Synchrotron X‐ray…
dc and ac magnetization measurements were performed on single-crystal Cu${}_{2}$OSeO${}_{3}$ under magnetic field ($H$) and hydrostatic pressure ($P$) conditions. Increasing $H$ shifts the ferrimagnetic transition observed at ${T}_{C}~60$ K to a higher-temperature region. Moreover, the ${T}_{C}$ increases linearly and…
We demonstrate active control of the plasmonic response from Au nanostructures by the use of a novel multiferroic substrate-LuFe(2)O(4) (LFO)-to tune the surface-enhanced Raman scattering (SERS) response in real time. From both experiments and numerical simulations based on the finite-difference time-domain method, a…
Abstract Two proton‐conducting organic–inorganic hybrid complexes have been constructed by the self‐assembly of protonated water clusters, transition‐metal aqua ions, [PMo 12 O 40 ] 3– anions and isonicotinic acid N ‐oxide (HINO). Single‐crystal X‐ray diffraction analyses at 293 K revealed that both complexes presente…
The strong ability of polyhedral oligomeric silsesquioxane (POSS) to aggregate in nonsolvents makes it interesting to study the self-assembly behaviors of polymer-POSS hybrids. Telechelic poly(styrene-ran-sodium styrenesulfonate) with POSS as the end groups was prepared via end-capping of anionic living polystyrene ch…
The interatomic potentials of multiferroic $h$-YMnO${}_{3}$ have been developed, which can reproduce the crystal structure of h-YMnO${}_{3}$ quite well. The doping behaviors of a variety of dopants from monovalent to tetravalent ions at the Y site have been systematically investigated by employing atomistic simulation…
Ring auf Ring: Durch Selbstorganisation formbeständiger Makrocyclen in der flüssigkristallinen Phase unter π-π-Stapelung entstehen leere Nanokanäle mit einem Innendurchmesser von mehr als einem Nanometer und entweder dichten oder durchlässigen Wänden (siehe Bild). Festkörper-NMR-spektroskopischen Studien zufolge befin…
The polyanion [AgAs(2)Mo(15)O(54)](11-) has an unusual cage-like structure composed of [AsMo(6)O(27)](15-) and [AsMo(6)O(24)](9-) subunits connected by three MoO(4) tetrahedra, and a Ag(+) cation is inclosed at the center of the cage and coordinated by two As atoms with a As-Ag-As bond angle of 180° along with three μ…
A simple one-pot polymer encapsulation method is developed for group II-VI semiconductor quantum dots (QDs) synthesized in aqueous solution. The micelles of amphiphilic polymers, such as octadecylamine-modified poly(acrylic acid), capture and encapsulate the QDs when the original hydrophilic ligands, namely 3-mercapto…
Strukturwechsel: Für eine stimulierte Peptidselbstorganisation braucht es eine Balance zwischen Konformationsänderung und struktureller Kontinuität stabiler β-Faltblätter. In einem amphiphilen Bipyridin-Tripeptid-Modell gelingt der reversible Morphologiewechsel zwischen Vesikeln und Nanofasern durch Temperatur und Ult…
Gold nanoparticles were synthesized by a hot-wire generator at atmospheric pressure using a gold-platinum composite wire. At low gas flow velocities the nanoparticles were found to be agglomerates of partially sintered primary particles. By reducing the tube size via the insertion of a nozzle with a throat diameter of…
Finite shear elasticity has been identified in the liquid state. The study is expanded to a van der Waal's molecular glass-former, o-terphenyl, and to an ordinary polymer melt, polybutylacrylate, as a function of their molecular weight. These fluids exhibit shear elasticity at the sub-millimetre scale and far above an…
Epitaxial SrTi${O}_{3}$ (STO)/Si templates open a unique opportunity for the integration of ferroelectric oxides, such as BaTi${O}_{3}$ on silicon and for the realization of new devices exploiting ferroelectricity. STO itself has been shown as ferroelectric at room temperature when deposited in thin layers on Si, whil…