Modification of nitrile-terminated biphenylthiol self-assembled monolayers by electron irradiation and related applications.

Modification of nitrile-terminated biphenylthiol self-assembled monolayers by electron irradiation and related applications.
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电子辐照修饰腈端联苯硫醇自组装单层膜及其相关应用

DOI:
10.1021/la301399a
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发表时间:
2012
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
M. Zharnikov
M. Zharnikov
中科院分区:
--
文献类型:
--
作者:
N. Meyerbröker;M. Zharnikov

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本文研究了4′-氰联苯-4-硫醇(CBPT)自组装单层(sam)在Au(111)上的电子辐照行为。在这种处理下,CBPT SAMs的芳香骨架是横向交联的,而位于SAM-ambience界面的腈基被还原为活性胺基,可以作为其他物种偶联的对接位点。这使得CBPT单层成为传统和化学光刻以及纳米制造的一个有前途的系统。沿着这些路线,我们展示了复杂聚合物刷的制备,底层衬底的图案,以及基于CBPT sam的分子薄独立膜的制造。详细研究了有利于应用的工艺和这些薄膜的碎片整理之间的平衡,并与已建立的(适用于相关应用的)4 ' -硝基联苯-4-硫醇体系进行了比较。以CBPT SAMs为模型体系,研究了取代芳香族SAMs中初级电子能量对化学转化和交联程度的影响。
Here we describe the behavior of self-assembled monolayers (SAMs) of 4′-cyanobiphenyl-4-thiol (CBPT) on Au(111) upon electron irradiation. Under such a treatment, the aromatic framework of CBPT SAMs is laterally cross-linked while the nitrile groups, located at the SAM–ambience interface, are reduced to active amine moieties which can be used as docking sites for the coupling of other species. This makes CBPT monolayers as a promising system for conventional and chemical lithography as well as for nanofabrication. Along these lines, we demonstrate the preparation of complex polymer brushes, patterning of the underlying substrate, and fabrication of molecule-thin, free-standing membranes on the basis of CBPT SAMs. The balance between the application-favorable processes and defragmentation in these films is studied in detail, and comparison to the well-established (for the relevant applications) system of 4′-nitrobiphenyl-4-thiols is performed. Taking CBPT SAMs as a model system, the effect of the energy of the primary electrons on the extent of the chemical transformation and cross-linking in substituted aromatic SAMs is investigated.
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