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。
AP7 is a nacre-associated protein of the mollusk shell that forms supramolecular assemblies that nucleate single-crystal aragonite in vitro. AP7 possesses two major sequence regions: a random coil 30-amino acid N-terminal domain (AP7N) and a partially disordered 36-amino acid C-terminal domain (AP7C) that exhibits imp…
International audience
Perovskite-type KNbO 3 could be synthesized at low temperature (<600 °C) via a modified solid-state reaction method in which urea played an important role. The synthetic mechanism of KNbO 3 via the modified solid-state reaction process has been studied by high-temperature X-ray diffraction (HT-XRD), thermogravimetry/d…
Ein natürlicher ultradünner flexibler Panzer: Neuartige hierarchische Mikrostrukturen aus dicht gepackten helicalen Aragonitnanofasern wurden in einer ultradünnen Flügelschneckenschale nachgewiesen. Die helicalen Nanofasern sind verzahnt und kristallographisch bis 10° fehlorientiert. Diese Strukturmerkmale tragen even…
Five new triply bridged dinuclear Cu(II) compounds have been synthesized, and their magnetic properties have been measured and characterized. The magnetic coupling constants (J) of these compounds plus a previously structurally characterized compound of the same type have been derived by appropriate fitting of the exp…
Periodic mesoporous hydridosilica, PMHS, is shown for the first time to function as both a host and a mild reducing agent toward noble metal ions. In this archetypical study, PMHS microspheres react with aqueous Ag(I) solutions to form Ag(0) nanoparticles housed in different pore locations of the mesostructure. The do…
AIMS: The extracellular pH of cancer cells is lower than the intracellular pH. Weakly basic anticancer drugs will be protonated extracellularly and display a decreased intracellular concentration. In this study, we show that copolymeric nanoparticles (NPs) are able to overcome this "pH-induced physiological drug resis…
Diamond films were deposited on silicon and tungsten carbide substrates in open air through laser-assisted combustion synthesis. Laser-induced resonant excitation of ethylene molecules was achieved in the combustion process to promote diamond growth rate. In addition to microstructure study by scanning electron micros…
Hybrid nanoparticles are designed and produced by a two-step procedure with the aim to obtain optically controlled multifunctional nanomaterials. In particular, using a sol–gel method in alcoholic/water media, silica particles doped with 9-aminoacridine molecules are prepared with a mean diameter of 31 nm, which prese…
Semiconductor nanocrystals or quantum dots (QDs) exhibit a number of unique optical properties including fluorescence intermittency (FI), photoluminescence (PL) enhancement, and darkening. Here we report PL activation (PLA) and darkening over populations of single colloidal ZnS-capped CdSe QDs under continuous illumin…
Abstract A condensed overview discusses the existing grafting approaches and the surface behavior of various hyperbranched polymers. We focus on the recent strategies and corresponding characterization of the resulting surface morphologies and structures with a number of relevant recent results from the authors' own r…
Cells generate 2'-deoxyribonucleoside triphosphates (dNTPs) for both replication and repair of damaged DNA predominantly through de novo reduction of intracellular ribonucleotides by ribonucleotide reductase (RNR). Cells can also salvage deoxynucleosides by deoxycytidine kinase/thymidine kinase 1 in the cytosol or by…
Carbonyl-ene reactions, which involve C-C bond formation, are essential in many chemical syntheses. The formaldehyde-propene reaction catalyzed by several of the group 11 metal cations, Cu(+), Ag(+), and Au(+) exchanged on the faujasite zeolite (metal-FAU) has been investigated by density functional theory at the M06-…
A systematic study of the temperature and magnetic field dependence of the longitudinal and transverse resistivities of epitaxial thin films of magnetite (Fe${}_{3}$O${}_{4}$) is reported. The anisotropic magnetoresistance (AMR) and the planar Hall effect are sensitive to the in-plane orientation of current and magnet…
The structural, electronic and optical properties of GaAs 1- x Bi x alloy are investigated using the density functional theory based on the full potential linearized augmented plane wave method as implemented in the Wien2k package. The exchange correlation potential is treated by generalized gradient approximation. We…
Happy marriage: For the first time, a fused TCNQ–TTF–TCNQ triad has been synthesized and structurally characterized. Strong bending is observed in both the TTF bridge and the benzo-TCNQ moieties, which prevents good packing for intermolecular charge transfer. The Vis/NIR and VT-EPR studies of the mixed-valence derivat…
The appropriate description of light scattering (transmission/reflection) at a bulky artificial medium, consisting of a sequence of functional metamaterial and natural material films, represents a major challenge in current theoretical nano-optics. Because in many relevant cases, in particular, in the optical domain,…
Fluorescent porous organic-inorganic thin films are of interest of explosive detection because of their vapor phase fluorescence quenching property. In this work, we synthesized fluorescent silica nanotubes using a biomineralization process through self-assembled peptidic nanostructures. We designed and synthesized an…
A complete integration of the silicon based optoelectronic devices was not possible, for many decades, to be made because the silicon is an inefficient emitter of light. Being a semiconductor with an indirect band-gap and having efficient free carrier absorption of the radiation, the crystalline silicon was considered…
Abstract The die casting defects and tensile properties of high pressure die cast (HPDC) Mg‐Zn‐Al‐RE alloys with various combinations of Zn and Al were studied. The results show that die casting defects in Mg‐Zn‐Al‐RE alloys are affected by the percentage of Zn and Al contents. The hot tearing susceptibility (HTS) of…