The World's Smallest Gas Cylinders?

Abstract

Rev. Sci. Instrum. 50, 1002 (1979] were used with either Re or spring-steel gaskets to compress the samples, which consisted of cryogenically loaded Xe along with Fe powder (<20 |xm grain size) and less than 10 volume % fine-grained ruby (<5 |xm grain size); the latter is used for pressure calibration [H. K. Mao, P. M. Bell, J. W. Shaner, J. Steinberg, J. Appl. Phys. 49, 3276 (1978)]. Samples were heated inside the diamond cell by means of a Quantronix 117 continuous-wave Nd:YAG laser operated in the TEM00 mode, with average temperatures ranging from 1860 (±180) to 3080 (±300) K being documented by imaging spectroradiometry [R. Jeanloz and A. Kavner, Philos. Trans. R. Soc. London Ser. A 354, 1279(1996]. 20. Diffraction patterns were obtained at high pressures and room temperature (before and after laser heating) using a Rigaku 12 kW/mm 2 rotating anode source of monochromatized Mo Ka x-rays. The diffraction patterns were collected in angular-dispersive mode with film and analyzed by methods described elsewhere [J. H. Nguyen and R. Jeanloz, Rev. Sci. Instrum. 64, 3456 (1993)].Epoxides are versatile building blocks for organic synthesis. However, terminal epoxides are arguably the most important subclass of these compounds, and no general and practical method exists for their production in enantiomerically pure form. Terminal epoxides are available very inexpensively as racemic mixtures, and kinetic resolution is an attractive strategy forthe production of optically active epoxides, given an economical and operationally simple method. Readily accessible synthetic catalysts (chiral cobaltbased salen complexes) have been used for the efficient asymmetric hydrolysis of terminal epoxides. This process uses water as the only reagent, no added'solvent, and low loadings of a recyclable catalyst (<0.5 mole percent), and it affords highly valuable terminal epoxides and 1,2-diols in high yield with high enantiomeric enrichment.Asymmetric catalysis provides access t o addition to carbonyl compounds (2). Both optically active epoxides either by oxygen-strategies have been developed t o varying atom transfer to alkenes ( J ) or by carbene degrees, but significant gaps still exist in the scope of these methodologies. For example,

Methane Decomposition: Production of Hydrogen and Carbon Filaments

“…[49][50][51][52][53][54][55][56] In the last few years significant efforts have been directed towards optimization of the process condition for CF formation. Researchers have investigated CF formation on different metal-based catalysts.…”

Carbon nanotubes-properties and applications: a review

“…However, the major issues pertaining to these techniques are related to the fact that CNTs are not able to encapsulate gaseous substances. Recent studies have revealed that H 2 and Ar can be stored in SWNTs [125,126] and MWNTs [127], respectively. Terrones et al [128] demonstrated experimentally that it is possible to introduce gaseous nitrogen inside MWNTs using a single-step process.…”

Effect of Sodium Dodecyl Sulfate Adsorption on the Behavior of Water inside Single Walled Carbon Nanotubes with Dissipative Particle Dynamics Simulation

“…The hollow part of the structure, inside the CNTs, could be considered as a confinement space where certain compounds can enter [4]. Therefore, there are interesting possible applications for open-ended CNTs, such as gas adsorbents [5,6], using them as molds to form one dimensional (quantum) systems [7,8], place catalysts on them [9], or use them as molecular filters for water treatment [10]. Hence, the adsorption and diffusion of chemical species (like water, gases etc.)…”