Tunable assembly of graphene oxide surfactant sheets: wrinkles, overlaps and impacts on thin film properties
Tunable assembly of graphene oxide surfactant sheets: wrinkles, overlaps and impacts on thin film properties
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DOI：
10.1039/c0sm00667j
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发表时间：
2010-01-01
期刊：
影响因子：
3.4
通讯作者：
Huang, Jiaxing
中科院分区：
文献类型：
--
作者：
Cote, Laura J.;Kim, Jaemyung;Huang, Jiaxing
氧化石墨烯(GO)片是一种独特的软构建块类型，用于创建基于石墨烯的功能材料和器件。围棋在化学和应用方面都取得了很大进展。然而，迫切需要这些二维(2D)薄片的合理组装策略，这对于确定块状GO或石墨烯材料的微观结构和最终性能至关重要。例如，褶皱和重叠是柔性相互作用的薄片之间的两种基本形态，这些薄片通常在溶液处理的薄膜中卷曲。基于最近发现的GO薄膜的表面活性剂性质及其与pH相关的两亲性，现在我们能够控制这种2D薄膜的平铺，以获得具有褶皱或重叠类型的微结构的薄膜，从而使我们能够了解这两种基本微结构是如何影响最终薄膜的电学和光学性能的。这里的工作为这种新的软材料提供了一个明确的材料科学范式--微结构-性能关系的例子。
Graphene oxide (GO) sheets are a unique type of soft building block for creating functional graphene based materials and devices. Rapid progress has been made in the chemistry and applications of GO. However, there is a pressing need for rational assembly strategies of these two-dimensional (2D) sheets, which is crucial for determining the microstructures and thus final properties of bulk GO or graphene materials. For example, wrinkles and overlaps are the two fundamental morphologies between flexible, interacting sheets that are usually convoluted in solution-processed thin films. Based on the recent discovery of the surfactant-like property of GO sheets and their pH dependent amphiphilicity, now we are able to control the tiling of such 2D sheets to obtain thin films with either a wrinkled or overlapped type of microstructure, thus allowing us to deconvolute how these two basic microstructures affect the electrical and optical properties of the final thin films. The work here provides a well-defined example of the materials science paradigm, the microstructure-properties relationship, for this new soft material.