Materials Literature
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The concentration dependent transformation of an oligopeptide nanostructure from nanovesicles to nanotubes at neutral pH is presented. The oligopeptide Acp-Tyr-Glu (Acp: 6-aminohexanoic acid) forms nanovesicles at a concentration of 6.9 mg mL(-1). At a concentration of 2.3 mg mL(-1) these vesicular structures complete…
Gadolinium-containing magnetic resonance imaging (MRI) contrast agents such as Omniscan are associated with nephrogenic systemic fibrosis (NSF). To determine if Omniscan can affect the differentiation of monocytes into fibroblast-like cells called fibrocytes that are found in the fibrotic lesions of NSF, peripheral bl…
We report intrinsic photoluminescence in the ultraviolet for adamantane $({\text{C}}_{10}{\text{H}}_{16})$, the smallest in a series of hydrogen-passivated diamond clusters (diamondoids). The luminescence is ascribed to recombination of self-trapped excitons. The inclusion of high amounts of nitrogen into the nanodiam…
A novel series of chiral hydrogen bonded liquid crystals have been isolated. Hydrogen bond was formed between chiral non mesogen ingredient levo tartaric acid and mesogenic p-n alkoxy benzoic acids. Phase diagram was constructed from the transition temperatures obtained by DSC and polarizing optical microscopic (POM)…
Electrical and optical properties of molybdenum-doped ZnO transparent conductive thin films prepared by dc reactive magnetron sputtering, Wu, Chenguo, Shen, Jie, Ma, Jin, Wang, Sanpo, Zhang, Zhuangjian, Yang, Xiliang
The styrene epoxidation on Au 38 and Au 55 clusters, which could be a benchmark to probe high catalytic activity of gold clusters, has been studied by using density functional theory. Results suggest that epoxidation proceeds via a surface oxametallacycle intermediate (OME structure). Two parallel reaction pathways co…
Gut gekühlt: Der erste auf Calix[4]arenen basierende 3d/4f-Cluster (siehe Bild; violett Mn, braun Gd, rot O, blau N) hat eine hohe magnetische Isotropie und viele molekulare Spinzustände, die selbst bei niedriger Temperatur besetzt sind, während sein ferromagnetisches Limit erst bei hohem angelegtem Feld erreicht wird…
The detection of the association between nephrogenic systemic fibrosis (NSF), a rare but potentially life-threatening disease only encountered in patients with severely impaired renal function, and the previous administration of some Gd-chelates has cast a shadow on the administration of Gd-chelates in patients with c…
Magnetic resonance imaging (MRI) and computed tomography (CT) have become essential to diagnostic evaluation of many, or most, important medically and surgically treated diseases. It is important to consider comprehensively the implications in making decisions when choosing one or the other cross-sectional imaging mod…
This article addresses two questions about gadolinium-based contrast agents (GBCAs) and nephrogenic systemic fibrosis (NSF): "Why did it happen" and "What have we learned"? It reviews the events leading to the discovery of an association between NSF and GBCAs. Various factors are elucidated that contributed to the del…
We present numerical studies of conduction in graphene nanoribbons with different types of disorder. We find that even when defect scattering depresses the conductance to values two orders of magnitude lower than $2{e}^{2}/h$, equally spaced conductance plateaus occur at moderately low temperatures due to enhanced ele…
A defect-free and electronically abrupt polymer/oxide interface can be achieved by spin-coating of PEDOT:PSS on ZnO-based heterostructures. The interface yielding Schottky contact leads to the successful modulation of quantum 2D transport in MgZnO/ZnO interfaces via the electric-field effect, which indicates that the…
Demagnetization occurring with time in a constant temperature is often assumed to be negligible, provided that the operating point of the magnet is above the knee of theB-Hcurve. However, because it is important to ensure that no permanent flux losses occur in permanent magnets during their use in industrial applicati…
Oleic acid stabilized superparamagnetic iron oxide nanoparticles (SPION) were selected as the cores for fabrication of sub-50-nm monodisperse single-loaded SPION@SiO2 core-shell nanostructures. Parameters that influence the formation of SPION@SiO2 in the water-in-oil reverse microemulsion system have been systematical…
Eindringlinge: Der effiziente Transport von Antikrebswirkstoffen in Zellen gelingt mithilfe reversibel vernetzender Dextrannanopartikel, die unter reduktiven Bedingungen – wie sie im Zellinneren vorherrschen – schnell destabilisiert werden. Die Nanopartikel nehmen große Wirkstoffmengen auf, und sie können Doxorubicin…
Abstract The synthesis, micelle formation, and bulk properties of semifluorinated amphiphilic poly(ethylene glycol)‐ b ‐poly(pentafluorostyrene)‐ g ‐cubic polyhedral oligomeric silsesquioxane (PEG‐ b ‐PPFS‐ g ‐POSS) hybrid copolymers is reported. The synthesis of amphiphilic PEG‐ b ‐PPFS block copolymers are achieved…
This study proposes a one-dimensional sub-wavelength grating structure on GaN surface which behaves as a reflector for transverse-electric polarized light in the blue wavelength range. The rigorous coupled-wave analysis method was used to analyze the effects of various structural parameters on the reflectance spectra…
Evidence obtained by experiments in the gas phase and density functional theory calculations indicates that differences in the CO binding energy to the transition metal site and the overall change in energy and spin multiplicity from reactants to products, underlie the variation in relative reactivity observed for the…
Water-dispersible aminoclay synthesized in a single step process was used as an inorganic filler for preparing polyvinyl alcohol (PVA)-clay hybrid films. The PVA-clay hybrid films with different weight percentages of aminoclay were obtained by simple mixing and casting of aqueous solutions of clay and polymer. The com…
${\text{ScPO}}_{4}$ and ${\text{YPO}}_{4}$ with the tetragonal zircon-structure were studied at room temperature and pressures up to $\ensuremath{\sim}50\text{ }\text{GPa}$. Pressure-induced phase transitions to the sheelite structure occur at 30 GPa for ${\text{ScPO}}_{4}$ and 16.3 GPa for ${\text{YPO}}_{4}$, respect…