Ripplocation in graphite nanoplatelets during sonication assisted liquid phase exfoliation
Ripplocation in graphite nanoplatelets during sonication assisted liquid phase exfoliation
复制标题
DOI：
10.1016/j.carbon.2017.12.100
复制
发表时间：
2018-04-01
期刊：
影响因子：
10.9
通讯作者：
Moshkalev, S. A.
中科院分区：
文献类型：
--
作者：
Alaferdov, A. V.;Savu, R.;Moshkalev, S. A.
研究了超声处理石墨液相剥离所引起的缺陷。结果表明，空化冲击波的局部冲击可以在石墨纳米片中产生体波纹和各种类型的位错。波纹的形成在大纵横（长度/宽度）比的薄片或纳米带中更明显。超声处理后，在许多纳米带中观察到准周期性涟漪系统。提出了超声波作用下波纹和位错的形成机理。令人惊讶的是，快速高温处理被发现退火的大多数缺陷。这与我们的观察结果一致，即与ripplocations相关的缺陷是强烈本地化的，因此可以快速退火。(C)2017爱思唯尔有限公司版权所有
Defects induced by liquid-phase exfoliation of graphite using sonication were studied. It was shown that localized impact by cavitation shock waves can produce bulk ripplocations and various types of dislocations in graphite nanoplatelets. Formation of ripples is more pronounced in large aspect (length/width) ratio platelets or nanobelts. Quasi-periodical ripple systems were observed in many nanobelts after sonication. Mechanism of formation of ripples and dislocations during sonication was proposed. Surprisingly, fast high-temperature processing was found to anneal most of defects. This is consistent with our observations that defects associated with ripplocations are strongly localized and thus can be fast annealed. (C) 2017 Elsevier Ltd. All rights reserved.