液氮中脉冲放电等离子体剥离石墨
Pulsed discharge plasma for graphite exfoliation in liquid nitrogen
摘要：
在液氮中采用脉冲放电等离子体剥离高取向热解石墨。通过观察石墨材料的处理表面和所获得的颗粒来研究所涉及的潜在机制。从等离子体处理的非剥离缺陷进行了观察和实验参数进行了修改，以抵消这些。在不将HOPG直接暴露于放电的情况下进行一个实验，以便更好地理解等离子体的作用。通过TEM和SEM观察剥离的颗粒以评价缺陷、尺寸、纯度和结晶度，但不可能对其厚度进行定量表征，因此每个颗粒的实际层数是未知的。尽管如此，通过该过程成功地剥离了几层石墨烯（FLG）。提出的机制是从受损的HOPG表面和获得的颗粒的观察外推，但发现的相关性并不能证明因果关系。
英文摘要：
Highly Oriented Pyrolytic Graphite was exfoliated via pulsed discharge plasma in liquid nitrogen. The potential mechanisms involved were investigated by observing the treated surface of the graphitic material and the obtained particles. Non-exfoliating defects from the plasma treatment were observed and experimental parameter were modified to counteract those. One experiment was performed without exposing the HOPG directly to the discharges so as to better understand the plasma role. The exfoliated particles were observed via TEM and SEM to evaluate the defects, the size, the purity and the crystallinity but no quantitative characterization of their thickness was possible so the actual number of layer of each particle is unknown. Nonetheless, few layers graphene (FLG) was successfully exfoliated through this process. The proposed mechanisms were extrapolated from the observation of the damaged HOPG surface and the obtained particles but the correlation found does not prove causation.
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