Materials Literature
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Insulated cantilever probes with a high aspect ratio conducting apex have been fabricated and their dynamic and electrical properties analyzed. The cantilevers were coated with silicon dioxide and a via was fabricated through the oxide at the tip apex and backfilled with tungsten to create an insulated probe with a co…
An efficient organometallic gelator can gel a variety of organic solvents even in concentrations as low as 0.2 wt %. π Stacking of the heteroarene moieties, van der Waals interactions between the alkyl chains, and metal–metal interactions may be responsible for the aggregation. This palladium pincer bis(carbene) compl…
In time-resolved Faraday rotation experiments we have detected an inplane anisotropy of the electron spin-dephasing time (SDT) in an $n$--modulation-doped GaAs/Al$_{0.3}$Ga$_{0.7}$As single quantum well. The SDT was measured with magnetic fields of $B\le 1$ T, applied in the $[110]$ and $[1\bar{1}0]$ inplane crystal d…
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A spin field effect transistor (FET) is proposed by utilizing a graphene nanoribbon as the channel. Similar to the conventional spin FETs, the device involves ferromagnetic metals as a source and drain; they, in turn, are connected to the graphene channel. Due to the negligible spin-orbital coupling in the carbon base…
Nanoscale metal catalysts have been indispensable for carbon nanotube (CNT) synthesis by chemical vapor deposition (CVD). We show that even semiconductor nanoparicles of SiC, Ge, and Si produce single-walled and double-walled CNTs in CVD with ethanol. This implies that nanosize structures might act as a template for t…
Big W: One of the largest polytungstates, the 20 cerium(III) atom tungstogermanate [Ce20Ge10W100O376(OH)4(H2O)30]56− (1), has been synthesized from CeIII ions and [α-GeW9O34]10− in aqueous acidic medium at pH 5.0. Polyanion 1 represents the first lanthanide-substituted tungstogermanate and can be described as a dimer…
We present a molecular characterization of metal-affinity driven self-assembly between CdSe−ZnS core−shell quantum dots (QDs) and a series of proteins and peptides appended with various length polyhistidine tags. In particular, we investigated the kinetics of self-assembly between surface-immobilized QDs and proteins/…
Neutron diffraction studies using powder samples have been used to understand the complex sequence of low temperature phase transitions of $\mathrm{Na}\mathrm{Nb}{\mathrm{O}}_{3}$ in the temperature range from $12\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}350\phantom{\rule{0.3em}{0ex}}\mathrm{K}$.…
There is increasing acceptance of high-throughput technologies for the discovery, development, and optimization of materials and catalysts in industry. Over the years, the relative synchronous development of technologies for parallel synthesis and characterization has been accompanied by developments in associated sof…
Lattice-mismatch strains are widely known to control nanoscale pattern formation in heteroepitaxy, but such effects have not been exploited in colloidal nanocrystal growth. We demonstrate a colloidal route to synthesizing CdS-Ag(2)S nanorod superlattices through partial cation exchange. Strain induces the spontaneous…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
NiTi shape memory alloy is a temperature sensitive material with non-linear mechanical properties and good biocompatibility, which can be used for medical devices such as stent, catheter guide wire and orthodontic wire. The majority of nitinol stents are of the self-expanding type basing on the superelasticity. Nitino…
Damping capacity is another primary characteristic of shape memory alloys (SMA) besides shape memory effect and superelasticity. Damping behavior of Ti-riched TiNi SMA, porous TiNi SMA and a novel TiNi/AlSi composite have been investigated using dynamic mechanical analyzer (DMA) in this investigation. All these alloys…
The interaction and reactivity of trimethylamine (TMA) has been studied over clean and oxygen-covered Ru(001) under UHV conditions, as a model for the chemistry of high-density hydrocarbons on a catalytic surface. The molecule adsorbs intact at surface temperature below 100 K with the nitrogen end directed toward the…
Abstract Unexpected fluorescence of poly(α,β‐ L ‐malic acid) (α,β‐PMA) without traditional fluorophore was observed firstly. This fluorescent polymer was synthesized via melt polycondensation of L ‐malic acid. The polymer was characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), diffe…
The thermoelectric cooler (TEC) has many potential applications in aerospace. Due to its lower coefficient of performance (COP), TEC consumes much more power than a mechanic cooler with the same cooling capacity does. To increase the COP of TEC and to improve its work reliability, we attached encapsulated phase change…
This article presents new methods of predicting the liquid-crystalline behavior of some copolyethers with mesogen groups in the main chain, using neural networks or different categorization algorithms. The prediction of properties is correlated with chemical structure, type and copolymer composition, molecular weight,…
Abstract This paper presents results on NO x removal using a dielectric packed‐bed plasma reactor where the reactor energy is varied in real time to optimise NO x removal. An automated system has been developed using computer‐control with an industry standard software package, a multifunction DAQ card, on‐line fast FT…
This paper presents a frequency response analysis of nickel-titanium Shape Memory Alloy (SMA) wires that are the active elements in an SMA actuator. Frequency response analysis is the measurement of the relative magnitude and phase of an output signal, with respect to an input signal, at spot frequencies covering a fr…