Fully cross-linked and chemically patterned self-assembled monolayers
Fully cross-linked and chemically patterned self-assembled monolayers
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DOI：
10.1039/b809787a
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发表时间：
2008-01-01
影响因子：
3.3
通讯作者：
Goelzhaeuser, Armin
中科院分区：
文献类型：
--
作者：
Beyer, Andre;Godt, Adelheid;Goelzhaeuser, Armin
机械稳定的单分子膜与化学功能图案的空间分辨化学光刻与完全交联的芳香族自组装单分子膜（SAMs）的组合。该过程开始于4 '-硝基-1，1'-联苯-4-硫醇的SAM的局部电子暴露，其将硝基转化为氨基，并且另外产生交联和非交联区域的图案。在下一步骤中，非交联区域中的分子被交换为1，1 '-联苯-4-硫醇。随后的电子曝光交联这些区域，产生完全交联的化学图案化SAM。产生化学互补图案的逆过程也被证明。对于这两个过程，X射线光电子能谱和原子力显微镜用于监测制造步骤，并确定硫醇交换的动力学。完全交联的，化学图案化的单层的功能性通过与戊酸酰氯的位点选择性衍生化进行测试。
Mechanically stable monolayers with chemically functional patterns are fabricated by the combination of spatially resolved chemical lithography with complete cross-linking of aromatic self-assembled monolayers (SAMs). The process starts with a local electron exposure of a SAM of 4'-nitro-1,1'-biphenyl-4-thiol that converts the nitro into amino groups and, additionally, generates a pattern of cross-linked and non cross-linked regions. In the next step, molecules in the non cross-linked regions are exchanged for 1,1'-biphenyl-4-thiol. A subsequent electron exposure cross-links these regions, yielding a fully cross-linked, chemically patterned SAM. The reverse process that generates chemically complementary patterns is also demonstrated. For both processes, X-ray photoelectron spectroscopy and atomic force microscopy are used to monitor the fabrication steps and to determine the kinetics of the thiol exchange. The functionality of the fully cross-linked, chemically patterned monolayer is tested by the site selective derivatisation with pentanoic acid chloride.