摘要
We report a simple method to produce graphene nanospheres （GNSs） by annealing graphene oxide （GO） solution at high-temperature with the assistance of sparks induced by the microwave absorption of graphite flakes dispersed in the solution. The GNSs were formed by rolling up of the annealed GO, and the diameters were mostly in the range 300-700 nm. The GNS exhibited a hollow sphere structure surrounded by graphene walls with a basal spacing of 0.34 nm. Raman spectroscopy and X-ray photoelectron spectroscopy of the GNSs confirmed that the GO was efficiently reduced during the fabrication process. The resulting GNSs may open up new opportunities both for fundamental research and applications, and this method may be extended to the synthesis of other nanomaterials and the fabrication of related nanostructures.
我们报导一个简单方法由退火生产 graphene nanospheres (GNS ) graphene 氧化物(去) 答案在与在答案驱散的石墨薄片的微波吸收导致的火花的帮助高温度。GNS 被滚动在上面形成退火去，并且直径主要在范围 300700 nm。GNS 展出了 graphene 墙用 0.34 nm 的基础间距包围的空范围结构。GNS 的拉曼光谱学和 X 光检查光电子光谱学证实 GO 高效地在制造过程期间被减少。产生 GNS 可以为基本研究和应用两个都开创新机会，并且这个方法可以被扩大到另外的 nanomaterials 和相关 nanostructures 的制造的合成。
基金
Acknowledgements This work was supported by the National Natural Science Foundation of China （Nos. 20825208, 60736004, 20973184, 20721061, and 60911130231）, the Major State Basic Research Development Program （Nos. 2011CB808403, 2011CB932303, and 2009CB623603）, and the Chinese Academy of Sciences.
