Download Aerosol synthesis of nanostructured, ultrafine fullerene by Jorma Joutsensaari PDF

Download Aerosol synthesis of nanostructured, ultrafine fullerene by Jorma Joutsensaari PDF

By Jorma Joutsensaari

Aerosol synthesis tools for the creation of nanostractured fullerene debris were built. The nanostractured, ultrafine fullerene debris have been produced through vapor condensation and aerosol droplet drying and crystallization tools in tubular laminar stream reactors. The formation mechanisms have been studied by way of measuring particle-size distributions is the gasoline part. High-resolution scanning and transmission electron microscopy equipment have been used to watch particle morphology and ciystal constitution, and to check the crystallization mechanisms of the fullerene debris. The creation stipulations of fullerene debris in the course of synthesis, i.e. fuel temperature and circulate profiles within the reactor, have been evaluated utilizing computational fluid dynamics calculations. which will examine the position of fullerene vapor in the course of crystallization, fullerene particle evaporation dynamics within the laminar move used to be modeled utilizing aerosol particle evaporation idea. moreover, a high-performance liquid chromatography strategy was once applied to review no matter if it was once attainable to split assorted fullerenes in the course of aerosol techniques.

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1982a. Formation of fault structures during coalescence and growth of gold particles in a fused silica matrix - I. Acta metallurgica, Vol. 30, p. 2093–2102. McGinn, J. , Greenhut, V. A. and Tsukalakos, T. 1982b. C. metals - II. Acta metallurgica, Vol. 30, p. 2103–2110. Meng, R. , Chow, P. , Moss, S. , Hor, P. H. and Chu, C. W. 1991. Growth of large, defect-free pure C60 single crystals. Applied Physics Letters, Vol. 59, p. 3402–3403. Messing, G. -C. and Jayanthi, G. V. 1993. Ceramic powder synthesis by spray pyrolysis.

If the particles are formed in thermal equilibrium, their shape results from minimizing the surface energy (El-Shall and Edelstein, 1996; Liu and Bennema, 1996). Verheijen et al. (1992a; 1992b) have predicted theoretical equilibrium shapes for fcc (face-centered cubic) C60 and C70 crystals that are grown slowly from the vapor phase, based on the periodic bond chain (PBC) theory (Hartman and Perdok, 1955c; Hartman and Perdok, 1955a; Hartman and Perdok, 1955b). The equilibrium morphology of an fcc C60 and C70 crystal is an octahedral shape of {111} faces truncated by {100} faces at the corners as shown in Figure 7.

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