Self-assembly of two-dimensional nanosheets induced by interfacial polyionic complexation.
Self-assembly of two-dimensional nanosheets induced by interfacial polyionic complexation.
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DOI：
10.1021/nn303608g
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发表时间：
2012-11
期刊：
影响因子：
17.1
通讯作者：
Jianli Zou;Franklin Kim
中科院分区：
文献类型：
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作者：
Jianli Zou;Franklin Kim
在过去的十年中，从各种材料制备纳米片取得了重大进展，这些材料被积极地用于各种应用，如储能、催化、传感和膜。下一个关键的挑战之一是开发一种强大而通用的组装方法，使纳米片的构造成为适合每种特定用途的功能结构。纳米片的一个有趣特性是它们通常表现为带电大分子，因此可以很容易地与带相反电荷的聚电解质相互作用，形成稳定的复合物。在本报告中，我们演示了如何利用这种络合过程来指导纳米片的自组装。通过将纳米片-聚电解质络合限制在气液或液液界面，纳米片成功地组装成各种中尺度结构，包括纤维、胶囊和薄膜。此外，加入额外的成分，如纳米颗粒或小分子，可以很容易地实现进一步定制材料特性。这种新的组装方法为许多有用的纳米片超结构开辟了一条途径，并可能进一步扩展到其他类型的纳米材料。
Significant progress has been made during the past decade in preparing nanosheets from a wide range of materials, which are actively pursued for various applications such as energy storage, catalysis, sensing, and membranes. One of the next critical challenges is developing a robust and versatile assembly method which allows construction of the nanosheets into functional structures tailored for each specific purpose. An interesting characteristic of nanosheets is that they often behave as charged macromolecules and thus can readily interact with an oppositely charged polyelectrolyte to form a stable complex. In this report, we demonstrate how such a complexation process could be utilized for directing the self-assembly of nanosheets. By confining the nanosheet-polyelectrolyte complexation at air-liquid or liquid-liquid interfaces, the nanosheets are successfully assembled into various mesoscale architectures including fibers, capsules, and films. Furthermore, incorporation of additional components such as nanoparticles or small molecules can be easily achieved for further tailoring of material properties. This novel assembly method opens a pathway to many useful nanosheet superstructures and may be further extended to other types of nanomaterials in general.