Download e-book for iPad: Aerosol synthesis of nanostructured, ultrafine fullerene by Jorma Joutsensaari

By Jorma Joutsensaari

Aerosol synthesis equipment for the construction of nanostractured fullerene debris were built. The nanostractured, ultrafine fullerene debris have been produced by way of vapor condensation and aerosol droplet drying and crystallization tools in tubular laminar movement reactors. The formation mechanisms have been studied via measuring particle-size distributions is the gasoline part. High-resolution scanning and transmission electron microscopy tools have been used to monitor particle morphology and ciystal constitution, and to review the crystallization mechanisms of the fullerene debris. The construction stipulations of fullerene debris in the course of synthesis, i.e. gasoline temperature and move profiles within the reactor, have been evaluated utilizing computational fluid dynamics calculations. as a way to research the function of fullerene vapor in the course of crystallization, fullerene particle evaporation dynamics within the laminar stream was once modeled utilizing aerosol particle evaporation thought. furthermore, a high-performance liquid chromatography technique used to be applied to check no matter if it used to be attainable to split diverse fullerenes in the course of aerosol approaches.

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C. and Seinfeld, J. H. 1988. Fundamentals of air pollution engineering. Englewood Cliffs, Prentice Hall. 542 p. Fleming, R. , Kortan, A. , Marsh, P. and Haddon, R. C. 1992. Crystalline fullerenes. In: Hammond, G. S. and Kuck, V. J. Fullerenes: synthesis, properties, and chemistry of large carbon clusters. Washington, American Chemical Society, p. 25–39. Fleming, R. , Kortan, A. , Thiel, F. , Haddon, R. , Kaplan, M. L. and Mujsce, A. M. 1991a. Pseudotenfold symmetry in pentane-solvated C60 and C70.

Schematic representation of a) decahedral and b) icosahedral particles consist of five or twenty fcc tetrahedra joined by twin boundaries (Harris, 1995). Particles formed from unstrained fcc tetrahedra have angular defects due to they cannot completely fill the space. III IV II V I TWIN Figure 13. HREM image a multiply twinned particle (decahedral). A twin boundary is marked by a white arrow and the five crystals bonded by twin boundaries are marked by Roman numerals. 43 Some of the decahedral particles have a modified shape, called Marks' decahedron (see Figure 14) which is the energetically favored shape for small clusters of fcc metals, according to an elastic theory (Marks, 1984) and computer simulations (Cleveland and Landman, 1991).

1960. Propagation mechanism of germanium dentrides. Journal of Applied Physics, Vol. 31, p. 1165–1168. 54 Harris, P. J. F. 1995. Growth and structure of supported metal catalyst particles. International Materials Reviews, Vol. 40, p. 97–115. Harris, P. J. , Douthwaite, R. , Stephens, A. H. H. and Turner, J. F. C. 1992. The structure and growth of C60 platelets. Chemical Physics Letters, Vol. 199, p. 631–634. Hartman, P. and Perdok, W. G. 1955a. On the relations between structure and morphology of Crystals.

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