A supramolecular hydrogen-bonded network as a diffusion barrier for metal adatoms.
A supramolecular hydrogen-bonded network as a diffusion barrier for metal adatoms.
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作为金属吸附原子扩散势垒的超分子氢键网络。
DOI：
10.1002/anie.200806267
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Silien C
中科院分区：
文献类型：
--
作者：
Silien C
分子结构所提供的多功能性和精确性使得基于表面的超分子自组装成为解决纳米尺度低端问题的有前途的策略。[1，2]虽然可以直接生成精确定义的图案，但需要后续的修改，例如功能化，二次图案化或宏观界面连接，以使此类结构变得有用。因此，一个关键问题是超分子结构与进一步修饰步骤的相容性。此外，在更大的规模上确定过程的机制预计不适用于超分子结构的长度尺度，因为降低的维数改变了过程的动力学，并改变了能量决定因素的影响。从这两点可以看出，自组装纳米结构的发展需要建立更高水平的复杂性和理解其内在机制的途径。沿着上述方向的第一步已经通过证明多孔超分子结构可以用作模板来控制其他分子的排列，例如C60，[3-5]晕苯，[6]或卟啉。[4]根据这一计划，最近展示了一种混合结构，将网络与自组装单分子层（SAMs）相结合。[7]由PTCDI和三聚氰胺组成的超分子氢键网络首先在Au（111）表面上形成，并且硫醇，例如w-（4 ′甲基联苯-4-基）乙硫醇（BP 2）被吸附到其孔中（图1）。由于SAM允许非常灵活的界面定制，[8，9]这种网络/SAM混合结构可能允许在纳米级上的通用和精确的化学反应，因此值得进一步探索。鉴于电位控制工艺所提供的机会，我们的兴趣在于金属电沉积，在这里，我们专注于铜的欠电位沉积（UPD）。UPD涉及在外来金属基底上沉积一到两个单层的金属，并且发生在能斯特电位的正向。[10]除了它先于本体沉积的事实之外，它还能够通过在SAM-衬底界面处的嵌入来修饰SAM，这改变了硫醇-衬底键，从而增强了SAM稳定性。这种效应可
The versatility and precision afforded by molecular structures make surface-based supramolecular self-assembly a promising strategy for addressing the lower end of the nanoscale.[1, 2] Whereas precisely defined patterns can be straightforwardly generated, subsequent modification, such as functionalization, secondary patterning, or macroscopic interfacing, is required for such structures to become useful. One critical issue is thus the compatibility of supramolecular structures with further modification steps. Moreover, mechanisms determining processes on a larger scale are not expected to apply at the length scale of supramolecular structures because the reduced dimensionality alters the kinetics of processes and changes the influence of energy-determining factors. From these two points, it is evident that the development of self-assembled nanostructures requires the establishment of routes towards higher levels of complexity and understanding of the underlying mechanisms.First steps along the aforementioned directions have been taken by demonstrating that porous supramolecular structures can be used as templates to control arrangement of other molecules, such as C60,[3–5] coronene,[6] or porphyrins.[4] Following this scheme, a hybrid structure, combining a network with self-assembled monolayers (SAMs), was demonstrated recently.[7] A supramolecular hydrogen-bonded network composed of PTCDI and melamine was first formed on a Au (111) surface and thiols, such as w-(4оmethylbiphenyl-4-yl) ethanethiol (BP2), were adsorbed into its pores (Figure 1). As SAMs allow very flexible tailoring of interfaces,[8, 9] such network/SAM hybrid structures potentially allow versatile and precise chemistry at the nanoscale and thus warrant further exploration. Given the opportunities afforded by potential-controlled processing, our interest lies in metal electrodeposition and herein we focus on the underpotential deposition (UPD) of copper. UPD involves deposition of one to two monolayer (s) of a metal onto a foreign metal substrate and occurs positive of the Nernst potential.[10] Beside the fact that it precedes bulk deposition, it also enables modification of SAMs by intercalation at the SAM–substrate interface, which alters the thiol–substrate bond and thus enhances SAM stability. This effect can be
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影响因子：
13.3
作者：
Stohr, Meike;Wahl, Markus;Jung, Thomas A.
通讯作者：
Jung, Thomas A.
影响因子：
3.7
作者：
Cyganik, Piotr;Buck, Manfred;Woell, Christof
通讯作者：
Woell, Christof
影响因子：
4.9
作者：
Blunt, Matthew;Lin, Xiang;Beton, Peter H.
通讯作者：
Beton, Peter H.
利用选择性解吸技术辅助银和铜的欠电位沉积在链烷硫醇自组装单层中制备纳米孔
影响因子：
4.5
作者：
Daisuke Oyamatsu;Hiroshi Kanemoto;S. Kuwabata;H. Yoneyama
通讯作者：
H. Yoneyama
裸金电极和化学改性金电极上铜沉积的初始阶段
DOI：
10.1002/(sici)1521-396x(199905)173:1
发表时间：
1999
期刊：
Physica Status Solidi (a)
影响因子：
--
作者：
M. Schneeweiss;D. Kolb
通讯作者：
D. Kolb