Functionalizing hydrogen-bonded surface networks with self-assembled monolayers
Functionalizing hydrogen-bonded surface networks with self-assembled monolayers
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DOI：
10.1038/nature07096
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发表时间：
2008-07-31
期刊：
影响因子：
64.8
通讯作者：
Buck, Manfred
中科院分区：
文献类型：
--
作者：
Madueno, Rafael;Raisanen, Minna T.;Buck, Manfred
纳米技术的核心挑战之一是开发灵活而有效的方法来在扩展的长度尺度上以纳米精度创建有序结构。在这方面，表面上的超分子自组装提供了有吸引力的特征：它是一种“自下而上”的方法，因此可以简单快速地创建表面组装（1,2），这很容易通过选择分子构建块来调整，并通过氢键（3-8）、范德华相互作用(9)、pi-pi键（10,11）或块之间的金属配位（12,13）来稳定。以二维开放网络（3,9,10,13-17）形式的组装对于可能的应用特别感兴趣，因为定义良好的孔隙可用于精确定位和限制客体实体，如分子或簇，这可以为超分子网络增加功能。另一种广泛使用的制造表面结构的方法涉及自组装单层（SAMs）（18），它为我们定制界面和生成图案表面的能力带来了前所未有的灵活性（19-22）。但是地对空导弹是自上而下的技术的一部分，在空间分辨率方面是有限的。因此，我们认为一个特别强大的制造平台可以通过结合多孔网络和sam的非共价自组装来实现，前者提供纳米尺度的精度，后者允许多功能功能化。在这里，我们表明这两种策略确实可以结合起来创建集成的网络SAM混合系统，该系统对进一步处理具有足够的鲁棒性。我们的研究表明，超分子网络和SAM都可以从溶液中沉积，这将使这种组合制造方法得到广泛和灵活的应用。
One of the central challenges in nanotechnology is the development of flexible and efficient methods for creating ordered structures with nanometre precision over an extended length scale. Supramolecular self- assembly on surfaces offers attractive features in this regard: it is a 'bottom- up' approach and thus allows the simple and rapid creation of surface assemblies(1,2), which are readily tuned through the choice of molecular building blocks used and stabilized by hydrogen bonding(3-8), van der Waals interactions(9), pi-pi bonding(10,11) or metal coordination(12,13) between the blocks. Assemblies in the form of two- dimensional open networks(3,9,10,13-17) are of particular interest for possible applications because well- defined pores can be used for the precise localization and confinement of guest entities such as molecules or clusters, which can add functionality to the supramolecular network. Another widely used method for producing surface structures involves self- assembled monolayers (SAMs)(18), which have introduced unprecedented flexibility in our ability to tailor interfaces and generate patterned surfaces(19-22). But SAMs are part of a top-down technology that is limited in terms of the spatial resolution that can be achieved. We therefore rationalized that a particularly powerful fabrication platform might be realized by combining non- covalent self- assembly of porous networks and SAMs, with the former providing nanometre- scale precision and the latter allowing versatile functionalization. Here we show that the two strategies can indeed be combined to create integrated network SAM hybrid systems that are sufficiently robust for further processing. We show that the supramolecular network and the SAM can both be deposited from solution, which should enable the widespread and flexible use of this combined fabrication method.