Mathematics

Data from B.M. Ginzburg and colleagues advance knowledge in crystallography

  2008 SEP 15 - (VerticalNews.com) -- "Dilute solutions of the C-70 fullerene (at concentrations from 0.0001-0.0005% to a few hundredths of a percent) in benzene, toluene, and p-xylene are investigated using small-angle and wide-angle X-ray diffraction. It is revealed that an increase in the C-70 fullerene concentration leads to a nonmonotonic shift of the small-angle X-ray diffraction patterns along the intensity axis: the intensity first decreases, reaches a minimum, and then increases," researchers in Russia report.

  "The wide-angle X-ray diffraction patterns of all the solutions under investigation exhibit two halos: as the fullerene concentration in the solution increases, the intensity of the first halo increases, whereas the intensity of the second halo decreases. The variations observed in the X-ray diffraction patterns of the fullerene solutions are interpreted in terms of structuring of the solvents, i.e., the formation of a specific order on the molecular and supramolecular levels. The X-ray diffraction data are in good agreement with the nonmonotonic concentration dependences of the density of the fullerene solutions in aromatic solvents," wrote B.M. Ginzburg and colleagues.

  The researchers concluded: "A structural interpretation of the initial decrease in the density of the fullerene solutions is proposed."

  Ginzburg and colleagues published their study in Crystallography Reports (Variations in the structure of aromatic solvents under the influence of dissolved fullerene C-70. Crystallography Reports, 2008;53(4):645-650).

  For additional information, contact B.M. Ginzburg, Russian Academy Science, Institute Problems Mech Engineering, Vasilevskii Ostrov, Bolshoi Pr 61, St. Petersburg 199178, Russia.

  Publisher contact information for the journal Crystallography Reports is: Maik Nauka, Interperiodica, Springer, 233 Spring St., New York, NY 10013-1578, USA.

  Keywords: Emerging Technologies, Fullerenes, Nanotech, Nanotechnology, SupramolecularCrystal Research and Technology.

  This article was prepared by VerticalNews Mathematics editors from staff and other reports. Copyright 2008, VerticalNews Mathematics via VerticalNews.com.