Solutions of Negatively Charged Graphene Sheets and Ribbons
Solutions of Negatively Charged Graphene Sheets and Ribbons
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DOI：
10.1021/ja808001a
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发表时间：
2008-11-26
影响因子：
15
通讯作者：
Penicaud, Alain
中科院分区：
文献类型：
--
作者：
Valles, Cristina;Drummond, Carlos;Penicaud, Alain
来自石墨插层化合物的带负电荷的石墨烯层自发地溶解在N-甲基吡咯烷酮中，而不需要任何超声处理，从而产生具有数十微米以上尺寸的横向延伸的原子厚石墨烯片和带的稳定的、空气敏感的溶液。这些可以沉积在各种基底上。通过STM、AFM、多光束干涉测量和Sarfus晶片上的光学成像进行了显示单原子厚度的高度测量，证明了石墨烯薄片和条带的沉积。在云母上的AFM高度测量给出了石墨烯的实际高度（约100厘米）。0.4 nm）。
Negatively charged graphene layers from a graphite intercalation compound spontaneously dissolve in N-methylpyrrolidone, without the need for any sonication, yielding stable, air-sensitive, solutions of laterally extended atom-thick graphene sheets and ribbons with dimensions over tens of micrometers. These can be deposited on a variety of substrates. Height measurements showing single-atom thickness were performed by STM, AFM, multiple beam interferometry, and optical imaging on Sarfus wafers, demonstrating deposits of graphene flakes and ribbons. AFM height measurements on mica give the actual height of graphene (ca. 0.4 nm).