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Preparation by arc-discharge in PEG and surface modification of onion-like fullerene

GUO Ming-cong~ 1,2 , YANG Yong-zhen~ 1,3 , LIU Hong-yan~ 1,2 , LIU Xu-guang~ 1,2 , XU Bing-she~ 1,3 (1. Key Laboratory of Interface Science and Engineering in Advanced Materials of Taiyuan University of Technology, Ministry of Education,2. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, 3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China)  
Onion-like fullerenes (OLFs) were synthesized by liquid arc-discharge in polyethylene glycol (PEG) with different molecular weight (600, 400, 200). The as-synthesized products were purified by air oxidation. And then purified OLFs were modified in oxygen-containing radio frequency (RF) plasma. The morphologies and structures of the products were characterized by field emission scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectrometry. It was found that the products synthesized in PEG 200 had uniform sizes and high degree of graphitization, air oxidation improved product purity, and surface modification was realized obviously in O_2(20%)+Ar RF plasma.
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