Abstract
Soot in carbon smoke has been studied by electron microscopy. Amorphous carbon and many C_<60> crystal grains were found in the soot. The fullerene content in the soot was more than 90%, which was produced under applied voltage of -12 in volt. The higher content of C_<60> attributes to produce small carbon clusters by ionization or charging. The formation model of C_<60> molecules is proposed. Which is called "saltation transition model".
