Béatrice Bonhomme

Bonhomme, Béatrice

doi:10.25071/0843-4182.28595

Cited by 2 publications

(2 citation statements)

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“…Kanatzidis and Bonhomme, [88] and Ozin and co-workers [89,90] independently published the first work in this direction. Both groups worked on the tetrahedral Ge 4 S 10 4± cluster and organized it by complexation with different cationic surfactants.…”

Section: Inorganic Nanophases and Arrangement Of Cluster By Surfactanmentioning

confidence: 99%

Ionic Self‐Assembly: Facile Synthesis of Supramolecular Materials

Faul

Antonietti²

2003

Advanced Materials

757

626

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The technique of ionic self‐assembly, i.e., the coupling of structurally different building blocks by electrostatic interactions, a powerful tool to create new material nanostructures and chemical objects, is reviewed. The excellent availability of the starting products (charged tectonic units) and the simplicity of synthesis, by neat addition and cooperative stoichiometric precipitation with high purity, allow the recombinatorial synthesis of a whole range of functional materials and hybrids with interesting and versatile functions. Diverse combinations between polyelectrolytes, surfactants, clusters, and extended rigid organic scaffolds are discussed in detail, and the underlying principles of nanostructure formation are illustrated.

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Section: Inorganic Nanophases and Arrangement Of Cluster By Surfactanmentioning

confidence: 99%

Ionic Self‐Assembly: Facile Synthesis of Supramolecular Materials

Faul

Antonietti²

2003

Advanced Materials

757

626

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“…Figure 13 left top shows the radial profile of the measured Reynolds stress emerging from coUisional drift waves and Fig. The action of Reynolds stress can also be demonstrated by a totally different technique -the analysis of density and velocity fluctuations via bi-coherence spectral analysis [68] as the production of zonal flows via the Reynolds stress mechanism is equivalent to three-wave coupling [69], [70]. These results of a linear machine show nicely the Reynolds stress generated flows.…”

Section: -The Bxvb Drift Effect On Pthmentioning

confidence: 83%

Physics of and Achievements With the H-Mode

Wagner¹,

Benkadda²

2008

AIP Conference Proceedings

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A Systematic Study of the Quasi-Coherent Mode in the High Density H-Mode Regime of Wendelstein 7-AS AIP Conf.Abstract. The H-mode is a confinement mode of toroidal plasmas which may make the goals of fusion possible -the development of a clean energy source at competitive electricity costs. The most challenging aspect in the understanding of the H-mode physics is the sudden disappearance of the edge turbulence whereas its potential driving forces increase. As the physics behind the H-mode is subtle many features are not yet clarified. There is, however, substantial experimental and theoretical evidence that turbulent flows, which normally limit the confinement, are diminished by sheared poloidal flow residing at the plasma edge. There are many potential mechanisms giving rise to sheared flow. The most intriguing of these is that fluctuations themselves induce the flow, which acts back to its generating origin and annihilates the turbulence. This review summarizes some of the studies on and achievements with the H-mode both for tokamaks and stellarators.It has been observed first at the ASDEX tokamak, that XE could spontaneously improve yielding higher energy content at constant heating power [4]. Such a case is again schematically shown in Fig. 1 right. The confinement improves at tt (tr stands for transition). This phase has been termed H-mode, with "H" denoting high confinement.When the heating power is turned off, W decreases with the prevailing long confinement time. It is an empirical fact that amidst the decay phase the plasma can suddenly adopt L-mode confinement. Such a transition occurs at tbtr (btr stands for back-transition); henceforth, W decays at a faster rate.The total power through a flux surface is given by: P = -2 S nxYkeT with S the surface under consideration and X being the heat diffusivity. The relation between XE and <%> shows that XE is a measure of the thermal insulation of the plasma and XE is finite because of the plasma losses from the source to the sink (plasma edge). A simple practical example is: % ~ Im^/sec, a ~ Im, XE ~ I sec. At constant power flux density, the improvement of confinement (reduction of %) causes the temperature gradient to increase. In case of sudden and distinct gradient, time tj.f, l^.,

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Béatrice Bonhomme

Cited by 2 publications

References 0 publications

Ionic Self‐Assembly: Facile Synthesis of Supramolecular Materials

Ionic Self‐Assembly: Facile Synthesis of Supramolecular Materials

Physics of and Achievements With the H-Mode

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