Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Microbial cellulose (MC) is being investigated for various applications in the field of biomedical engineering. Gluconacetobacter xylinus is able to produce pure cellulose in the form of a hydrogel ("pellicle"). The pellicle consists of a defined tridimensional structure that is sensitive to mechanical stress during t…
The field of nanotechnology has exploded in recent years with diverse arrays of applications. Cancer therapeutics have recently seen benefit from nanotechnology with the approval of some early nanoscale drug delivery systems. A diversity of novel delivery systems are currently under investigation and an array of newly…
The great majority of low-spin {FeNO}(7) complexes exhibit FeNO angles of around 140-145°, whereas a small handful are characterized by linear FeNO units. Conspicuously absent are intermediate FeNO angles of 150-170°. Spurred by the recent observation of such an angle in a square-pyramidal {FeNO}(7) complex, we carrie…
Precursors of polyurethane chains have been reacted by means of in situ polymerization with organically modified montmorillonite clay to obtain polyurethane nanocomposites containing from 1 to 4 wt % of nanoreinforcement. The effective final dispersion of inorganic component at nanometric scale was investigated by X-r…
Using first-principles techniques we study the electronic structure, deformation potentials, and electron-phonon coupling in both single-walled and double-walled carbon nanotubes. Calculations were done for metallic single-walled carbon nanotubes in armchair configurations (5,5) and (10,10). Additionally, we study the…
We propose a single mode transflective liquid crystal display (LCD) which is operated as the transmissive and reflective modes in a single pixel without dividing into sub-pixels. The single pixel transflective LCD was composed of the cross-polarized nematic LCD as a light modulator and the broadband cholesteric liquid…
An atmospheric-pressure radio-frequency discharge (APRFD) has great advantages over vacuum-oriented plasma-enhanced chemical vapour deposition (PECVD) as well as other types of atmospheric-pressure plasma sources in terms of single-walled carbon nanotube (SWCNT) growth. We first provide an overview on the recent advan…
Weak anti-ferromagnetic coupling is observed in a mononuclear copper(II) complex, [Cu(Pid)(OSO3)(H2O)] · (H2O) (Pid = 2,2′-(1,10-phenanthrolin-2-ylimino)diethanol). The Cu(II) complex is a distorted square pyramid. Analysis of the crystal structure indicates that there are two types of magnetic coupling pathways, wher…
We report on a new type of liquid crystalline cellulosic films with light controllable reversible wettability. The films are prepared from a thermotropic cellulose derivative functionalized with azo-containing groups. These groups exhibit dynamic changes in interfacial properties in response to UV irradiation. The UV…
Von Cope-Umlagerungen und Valenzisomerisierungen von Kleinringsystemen spannt sich dieser persönliche Rückblick über das zentrale Thema von E. Vogels Forschungen – Aromatizität und Hückel-Regel – mit 1,6-Methano[10]annulen als Prototyp überbrückter Acene bis zu Porphycenen und anderen Porphyrin-Strukturvarianten.
The exceptional mechanical, chemical, thermal, electrical and optical properties of single-walled carbon nanotubes (SWCNTs) have tantalized the scientific community for over two decades. However, SWCNTs must be prepared with a high degree of uniformity, which represents a significant synthetic challenge, to make the e…
Reticulated mesh samples of Co-29Cr-6Mo alloy and Ni-21Cr-9Mo-4Nb alloy (625) and stochastic foam samples of Co-29Cr-6Mo alloy fabricated by electron beam melting were characterized by optical metallography, and the dynamic stiffness (Young’s modulus) was measured by resonant frequency analysis. The relative stiffness…
There has been tremendous interest and progress with synthesis of inorganic nanowires (NWs). However, much of the progress only resulted in NWs with diameters much greater than their respective quantum confinement scales, i.e. 10–100 nm. Even at this scale, NW-based materials offer enhanced charge transport and smalle…
This paper reports for the first time that under ammonia atmosphere, ammonia borane (AB) reversibly absorbs up to at least 6 equiv of NH(3), forming liquid AB(NH(3))(n) (n = 1-6) complexes at 0 °C. Reasonable structures for AB(NH(3))(n) were identified via density functional theory calculations, which indicate that th…
"Core-corona" type amphiphiles, which comprise double-decker-shaped POSSs (DDSQs) as the core and two or four di(ethylene glycol) (DEG) units as the coronae, have recently been reported to form a stable monolayer at the air-water interface. In this paper, another core-corona amphiphile, 2DEGNH-DDSQ, which has a uretha…
Laser-stimulated polymer brushes: The temperature-dependent switching kinetics of surface-grafted thermoresponsive polymer brushes were investigated by a stroboscopic micromanipulation/-characterization technique for real-time parallel measurements (see picture). Intrinsic response times range from the microsecond to…
The new compounds NaLaFeTaO 6, NaLaFeNbO 6, NaLaMnTaO 6, and NaLaMnNbO 6 have been synthesized and characterized with a combination of transmission electron microscopy, X-ray powder diffraction (XRPD), neutron powder diffraction (NPD), and magnetization measurements. Through electron microscopy study, a local layered…
We study the role of nonlocality of exchange in a neutral zigzag graphene nanoribbon within the $\ensuremath{\pi}$-orbital unrestricted Hartree-Fock approximation. Within this theory we find that the magnetic features are further stabilized for both the intraedge and interedge exchange as compared to mean-field theori…
Nanocrystals and supracrystals are arrangements of highly ordered atoms and nanocrystals, respectively. At the nanometer scale, from face-centered cubic (fcc) tetrahedral subunits, either single fcc nanocrystals such as cubooctahedra and octahedra or decahedral and icosahedral nanocrystals are produced. Such nanocryst…
The present study aims at documenting, making use of an original set-up allowing to acquire well-converged data, the coarsening of foams in two dimensions. Experiments show that a foam behaves quite differently depending on the way it has been prepared. We distinguish between an initially quasi-monodisperse foam and a…