Preparation of fullerenes by arc discharge between graphite anode and tungsten cathode; Effects of gas species

Otsuki, Ryusei*; Nasu, Shoichi*; Ohashi, Kentaro*; Yamamoto, Ryoichi*; Fujii, Kimio; Okubo, Keisuke*

The He, Ar and the Penning gas pressureeffects on the preparation yieldsof the fullerenes were investigated by means of the arc discharge method using graphite(PGX) anode buried in a tungsten rod and tungsten cathode for collector radii of 50mm. The maximum yield showed about 13-14 % at 67KPa in He gas. The yields in the mixtures of He and Ne gases (the Penning effect) were similar to those obtained in He gas. Weight ratios of C $_{60}$ to (C $_{60}$ +C $_{70}$ ) were about 20% in Ar gas, while those in He and Penning gas were about 60%. Ultra sonic vibration was effective to separate C $_{70}$ from soot.

Language	:	English
Journal	:	Funtai Oyobi Fummatsu Yakin
Volume	:	51
Number	:	8
Pages	:	p.626 - 629
Publication Year/Month	:	2004/08
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Paper URL	:	https://doi.org/10.2497/jjspm.51.626
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Keywords	:	Fullerene; Arc Discharge; Helium; Argon; Penning Gas
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Registration No. : A20040448
JAEA Abstracts No. : 320995
Paper Submission No. : 21396

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