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。
Abstract Know your bacteria! Two fluorene‐based, conjugated polymers with oligo(ethylene glycol)‐ and poly(ethylene glycol)‐tethered spacers have been prepared by the Suzuki coupling polymerization reactions. β‐Glucose and α‐mannose residues were covalently attached to the conjugated polymers by post‐polymerization fu…
Abstract Die Anwendung nanotechnologischer Konzepte in der Medizin verbindet zwei große interdisziplinäre Wissenschaftsgebiete mit einem beispiellosen sozialen und ökonomischen Potenzial. Diese Nanomedizin nutzt die Errungenschaften beider Forschungsfelder, wobei die gemeinsame Basis die Untersuchung spezifischer Eige…
This paper presents a controlled, large scale fabrication of mesoporous ZnO thin films. The entire ZnO mesoporous film is one piece of a single crystal, while high porosity made of nanowalls is present. The growth mechanism was proposed in comparison with the growth of ZnO nanowires. The ZnO mesoporous film was succes…
The combined local structure techniques, extended x-ray absorption fine structure and neutron pair distribution function analysis, have been used for temperatures $4\ensuremath{\le}T\ensuremath{\le}330\text{ }\text{ }\mathrm{K}$ to rule out a large Jahn-Teller (JT) distortion of the Co-O bond in ${\mathrm{La}}_{1\ensu…
Abstract A series of castor‐oil‐modified hyperbranched polyurethanes were synthesized via an A 2 + B 3 approach based on castor oil, macroglycol poly(ϵ‐caprolactone)diol or poly(ethylene glycol) (PEG), and diphenyl methane diisocyanate, with or without a chain extender. The yield of the product was 95%, and the polyme…
Magnetically functionalized mesoporous silica spheres with different size (average diameter, A.D.) from 150 nm to 2 μm and pore size distribution were synthesized by generating magnetic Fe x O y nanoparticles onto the mesoporous silica hosts using the sol−gel method. The X-ray diffraction (XRD), field emission scannin…
A focused laser beam is used to heat individual single-walled carbon nanotube bundles bridging two suspended microthermometers. By measurement of the temperature rise of the two thermometers, the optical absorption of 7.4-10.3 nm diameter bundles is found to be between 0.03 and 0.44% of the incident photons in the 0.4…
Large-scale, high-purity, and uniform one-dimensional Ag 2 MO 4 (M = Cr, Mo, and W) were obtained by a facile hydrothermal method. The as-prepared Ag 2 MO 4 materials exhibited linear current−voltage ( I − V ) characteristics and excellent photoresponse. As the light source was switched on and off, the currents could…
Abstract Ultrafine fibers consisting of blends of polyaniline doped with p ‐toluene sulfonic acid and poly( L ‐lactic acid) were prepared by electrospinning. The presence of polyaniline resulted in fibers with diameters as thin as 100–200 nm and a significant reduction of bead formation. These fibers were visually hom…
The reactions of molecular oxygen with bridging hydroxyl groups (OH b ’s) formed by H 2 O dissociation on bridging oxygen vacancies (V O ’s) of TiO 2 (110) are studied at low and high OH b coverages as a function of the O 2 exposure, using scanning tunneling microscopy, temperature programmed desorption, and electron…
Photoremovable protecting groups that can reveal biologically important functional groups through one- and two-photon excitation (1PE and 2PE, respectively) have promise in regulating physiological function in a temporally and spatially restricted manner. Only a few chromophores have sufficient sensitivity to 2PE suit…
The emerging and potential commercial applications of nanotechnologies clearly have great potential to significantly advance and even potentially revolutionize various aspects of medical practice and medical product development. Nanotechnology is already touching upon many aspects of medicine, including drug delivery,…
Abstract Schiff base ligands ( L1 H– L8 H) have been prepared and complexed to Zn II centres. All eight complexes have been characterised by single‐crystal X‐ray diffraction methods, multinuclear NMR spectroscopy and elemental analysis. It was shown that for L1 H and L2 H trimetallic complexes of the form Zn 3 (OAc) 4…
Glassy ferromagnetism is observed in diluted magnetic semiconductor Al-doped 4H-SiC. We propose a possible explanation for the origin of ferromagnetism order that is the coeffect of sp(2)/sp(3) configuration along with the structural defects. This result unambiguously demonstrates the existence of intrinsic ferromagne…
The activation of the shape-memory effect of nanocomposites (NC) by alternating magnetic fields requires exceeding the switching temperature T s . Different factors, which can influence this process, have been investigated. The intrinsic properties of magnetic nanoparticles (MNP), their content and distribution in the…
On the tube: The coupling of diazonium ions onto single-walled carbon nanotubes is shown to proceed through a radical chain reaction by kinetic analysis of the absorption peak drop (see picture). Radical species are also revealed by ESR. Metallic (m) nanotubes play a special catalytic role in the functionalization of…
Abstract The reactions of Cu II carboxylates (valerate, 2‐methylbutyrate, hexanoate, heptanoate) with pyrazole (Hpz) in EtOH or EtOH/water solutions easily afford the triangular trinuclear copper derivatives [Cu 3 (μ 3 ‐OH)(μ‐pz) 3 (RCOO) 2 (L) x ] [R = CH 3 (CH 2 ) 3 , L = H 2 O, x = 1 for 5 ; R = CH 3 CH 2 CH(CH 3 )…
In this letter, we present a low-temperature synthesis route revealing a new type of ultrasmall CdSe nanoparticle family with exceptional narrow blue emissions between 437 and 456 nm and full width at half-maxima below 20 nm. Transmission electron microscopy characterization shows the uniformity of the nanoparticles,…
We present the structural evolution mechanism during the NiTi martensitic transformation and show the origins of this behavior in electronic and phononic anomalies. By employing highly precise all-electron density-functional theory calculations, we establish a barrierless transformation path for equiatomic NiTi consis…
Vertically aligned, dense ZnO nanorod arrays were grown directly on zinc foils by a catalyst-free, low-temperature (450-500 degrees C) oxidization method. The zinc foils remain conductive even after the growth of ZnO nanorods on its surface. The success of this synthesis largely relies on the level of control over oxy…