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[资源] 可调的，自组装的3D还原氧化石墨烯结构

Tunable, self-assembled 3D reduced graphene oxide structures fabricated via boiling. Carbon 81 (2015) 357 -366. 影响因子：6.16
摘要：To exploit the favorable mechanical and electrical properties of graphene in practical applications, control over the dimensionality and geometry of assembled graphene structures is required. Here, we report the use of boiling with reduced graphene oxide (RGO) colloidal dispersion to form self-assembled three dimensional (3D) RGO structures. The morphology of the resulting self-assembled RGO structures could be controlled by varying the heat ﬂux during boiling. A large heat ﬂux resulted in continuous bubble nucleation at the surface, and consequently, the interference exhibited aggregates of RGO ﬂakes around the bubble nucleation site due to repetitive expansion and contraction of the bubble triple line. As the water evaporated, self assembled foam like graphene (SFG) was formed. As the heat ﬂux increased, more vigorous agitation occurred at the interface, which led to smaller pores in the structures. With a low heat ﬂux, the less vigorous bubble interference dynamics led to interactions between the RGO ﬂakes, and consequently, self assembled bumplike graphene (SBG) structures were formed, which were not porous. The self assembled RGO 3D structures exhibited favorable mechanical and electrical properties compared with conventional 3D self assembled graphene or carbon based structures. Such controllable 3D RGO structures with good mechanical and electrical properties have potential applications.
中文翻译摘要：为了探究石墨烯在实际应用中有利的机理和电学性能，需要控制组装的石墨烯结构的维度和结构。这里，我们报道了蒸发还原氧化石墨烯（RGO）胶体分散形成自组装的三维（3D）RGO结构。合成的自组装的RGO的形态可以通过改变沸腾过程中的热流来控制。大的热流在表面导致连续的气泡成核，因此，由于气泡三重直线重复的热胀冷缩，干扰表现出在气泡成核位置的周围聚集RGO薄片。由于水的蒸发，形成了自组装的泡沫状的石墨烯（SFG）。由于热流的增长，在界面处发生更大的剧烈搅动，这导致结构中更小孔的出现。低的热流下，较少的有利的气泡干扰动力学导致RGO薄片间的相互作用，结果，形成了自组装的肿块状的石墨烯（SBG）结构，不是多孔的。自组装的RGO3D结构具有很好的机电性能与传统的石墨烯或碳基结构相比。这种具有好的机电性能的可控的3DRGO结构具有很大的应用潜力。
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