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。
A method is described for assembling gold nanorods, end-to-end, into long chains attached on top of a mixed self-assembled monolayer that has been functionalized with streptavidin. Methods to prepare chains of nanorods in colloidal suspension have been reported by others, but our protocol offers a way to directly form…
This study demonstrates the hydrophobic coating of carbon nanotubes (CNTs) by methane (CH4) glow discharge plasma at low pressure and investigates the superhydrophobic behavior of the treated CNTs. Carbonaceous species produced from the CH4 glow plasma were identified by optical emission spectroscopy. The treated CNTs…
Abstract The adhesion of several washcoats deposited on stainless steel microchannels was investigated by performing a mechanical test (drop test) after application‐oriented tests, temperature cycling, and water exposure. For this study alumina washcoats (γ‐Al 2 O 3 ) and washcoats of commercially available alumina‐ba…
We investigate how a droplet of a complex liquid is modified by its internal nanoscale structure. As the liquid passes from an isotropic disordered state to an anisotropic layered morphology, the droplet shape switches from a smooth spherical cap to a terraced hyperbolic profile, which can be modeled as a stack of thi…
The aim of the present paper is to identify the main infrared vibrational features of carbon nanotubes. In this goal, infrared experiments have been performed on different well-characterized single-walled carbon nanotubes (SWCNTs) and double-walled carbon nanotubes (DWCNTs) as well as graphite and carbon aerogel. The…
High-brightness Y 2 O 2 S red phosphor powders with sub-micrometer particle size were prepared by complex homogeneous precipitation method employing hydrolysis of urea in water solutions of various diols. Sulfurization was carried out by annealing of the obtained powders at 700−1200 °C in the presence of Na 2 CO 3 −S…
In this paper the temperature evolution of the main Raman peak at about 630 cm −1 has been studied in order to detect the ferroelectric to paraelectric phase transition in strontium barium niobate (Sr x Ba 1− x Nb 2 O 6 ) crystals with different stoichiometries ( x = 0.33, 0.5 and 0.61). Both its peak wavenumber and w…
We predict the intramolecular magnetic exchange coupling constant (J) for eleven nitronyl nitroxide diradicals (NN) with different linear and angular polyacene couplers from broken-symmetry density functional treatment. For the linear acene couplers, J initially decreases with increase in the number of fused rings. Bu…
We reported the first synthesis of CdS nanocrystal-polymer transparent hybrids by using polyurethane (PU) grafted onto quantum dots (QDs) CdS nanocrystals. In a typical run, the appropriate amounts of cadmium chloride (CdCl2) and sodium sulfide (Na2S) in the presence of 2-mercaptoethanol (ME) as the organic ligand are…
A simple and unique method of producing intense red-emitting (Ca,Zn)TiO 3 : Pr 3+ (CZT : Pr) phosphor with longer decay characteristics is presented. A 1 : 1 molar mixture of H 3 BO 3 and NH 4 F was identified to be a better fluxing agent and charge compensator in promoting a highly crystalline phase of (Ca,Zn)TiO 3 t…
Single-walled carbon nanotubes have been functionalized and the specific surface areas of the functionalized nanotubes measured. Contrary to expectations, functionalization leads to a decrease in specific surface area compared to that of the unfunctionalized nanotubes. Treatment with a concentrated 1:1 nitric/sulfuric…
A thermally reversible repulsive hard-sphere to sticky-sphere transition was studied in a model colloidal system over a wide volume fraction range. The static microstructure was obtained from high resolution small angle x-ray scattering, the colloid dynamics was probed by dynamic x-ray and light scattering, and supple…
Poly(epsilon-caprolactone)/polystyrene (PCL/PS) blends, where nonamphiphilic PS is glassy in the bulk state at the experimental temperature of 22.5 degrees C, are immiscible as Langmuir films at the air/water (A/W) interface. Surface pressure-area per monomer isotherm analyses indicate that the surface concentration o…
The transport of guest molecules between adjacent pore channels (cross-wall transport) is the limiting factor in the release of guest molecules from SBA-3-like fibers. This specific mode of diffusion is identified by microscopic observation and studied quantitatively in a UV/Vis-monitored release experiment. Analysis…
A light-emitting poly (distyryldimethylbenzene-co-triethylene glycol) rod-coil block copolymer was used to fabricate films with three-dimensionally ordered honeycomb structures by the breath-figure method. Photocurrent generation and photovoltaic performance are studied, and the dependence of photocurrent on applied e…
We introduce a geometric analysis of random sphere packings based on the ensemble averaging of hard-sphere clusters generated via local rules including a nonoverlap constraint for hard spheres. Our cluster ensemble analysis matches well with computer simulations and experimental data on random hard-sphere packing with…
We propose a metamaterial with a three-layer structure based on Faraday's law. The metamaterial is simply formed by a pair of homogeneous parallel plates separated by a thin medium. We also propose a virtual current loop with length of $2a$ ($a$ is the attenuation constant) in the plates, which can be formed upon exci…
In this paper, we investigate the dependence of the bistable electro-optic response of organosiloxane based smectic A liquid crystals on key material properties; the modes are optically scattering (<100 Hz) and clear (>1 kHz), respectively. The scattering mode is generated by motion of doped ionic species and is depen…
Abstract MnZnFe 2 O 4 ferrite nanoparticles were prepared by co-precipitation method using a microwave heating system at temperature of 100 °C. X-ray diffraction reveals the samples as prepared are pure ferrite nanocrystalline phase, transmission electron microscopy image analysis shows particles are in agglomeration…
Von Kugeln zu Spiralen: Tripodale Squaraine aggregieren aus Acetonitril zu hohlen Kugeln, die bei Komplexierung mit Ca2+ oder Mg2+ ausgedehnte Netzwerke bilden. Ein analoger chiraler Farbstoff zeigt bei der Bindung von Ca2+ ein bisignates CD-Couplet und eine helicale Morphologie (siehe Bild). Die molekulare Chiralität…