Download Chemical Physics of Intercalation II by Guy Ouvrard (auth.), Patrick Bernier, John E. Fischer, PDF

By Guy Ouvrard (auth.), Patrick Bernier, John E. Fischer, Siegmar Roth, Stuart A. Solin (eds.)

This quantity offers a list of the second one ASI at the topic "Chemical Physics of Intercalation", which was once patterned after its hugely winning July 1987 predecessor. A turning out to be group of chemists, physicists and fabrics scientists has come to understand the application of extending the intercalation inspiration to commonly used guest-host compounds and stable recommendations. The unifying issues are the advanced part equilibria which outcome from the contest among repulsive and engaging interactions among and in the visitor and host substructures, the tunability of houses via keep watch over of visitor focus and superlattice periodicity, and the extensive spectrum of strength purposes which those fabrics could provide. The good fortune of this initiative might be judged by means of noting the enlarged scope of fabrics lined during this quantity in comparison to its predecessor. the current quantity covers the spectrum from three-d oxides, 2-dimensional classical layer intercalates,- dimensional doped polymers and zero-dimensional doped fullerene lattices. Hybrid platforms equivalent to polymers in layer hosts and nonporous hosts also are handled. a number of chapters offer worldwide unifying viewpoints via focussing on offered kingdom chemical elements, shipping and optical homes, the prevalence of superconductivity, etc.

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Superconducting properties of Cs-Bi-GICs [35]. 1 %. 4 (stage 1, a-phase) no superconductivity could be detected down to about 50 mK. 1 and 5%. One example is shown in Fig. 7. 75 K) the only known superconducting CsBi-compound. These results are a strong indication for CsBi 2 inclusions which means that the GIC itself is not superconducting. 3 K [35]. The successful preparation of a superconducting graphite fiber was published by Tsukamoto et al. [23]. 4 K. 1 K). 5 was found to be quite "normal".

Brec and H. Dexpert, J. Solid State Chern. 91:271 (1991) 55. E. Prouzet, Thesis, Nantes (France) (1988) 29 SUPERCONDUCTING INTERCALATION COMPOUNDS OF C 6 0 AND GRAPHITE Klaus Liiders Fachbereich Physik Freie U niversitat Berlin Arnimallee 14, D-W-1000 Berlin 33, Germany INTRODUCTION In two modifications of carbon, graphite and fullerene, superconductivity is observed after intercalation with either alkali metals or binary alloys containing an alkali metal as one of the components. Superconductivity in graphite intercalation compounds (GICs) was already discovered in the sixties by the Matthias group [1] whereas superconductivity of doped fullerenes was only found recently by Hebard et a1.

Crystal structure of C 60 and A3 C 60 . The open and the hatched spheres represent the tetragonal and octahedral interstitial sites, respectively, which are filled with the alkali ions in the doped fullerene. The 13C NMR spectrum of these un doped crystals consists of a narrow single peak with a chemical shift of 143 ppm [40]. The sharp resonance line together with a rather long spin-lattice relaxation time T 1 indicates a rapid motion, generaJly considered as a free rotation of the Ceo molecules with rates exceeding 109 S-l.

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