Structure of 1,4-benzenedimethanethiol self-assembled monolayers on gold grown by solution and vapor techniques
Structure of 1,4-benzenedimethanethiol self-assembled monolayers on gold grown by solution and vapor techniques
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DOI：
10.1021/la0208530
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发表时间：
2003-04-29
期刊：
影响因子：
3.9
通讯作者：
Naciri, J
中科院分区：
文献类型：
--
作者：
Pugmire, DL;Tarlov, MJ;Naciri, J
用X射线光电子能谱(XPS)和面内电阻率测量研究了溶液和气相法制备的十硫醇和1，4-苯二甲硫醇(p-BDMT)自组装单分子膜的特性。自组装的十硫醇单分子膜对从溶液和蒸气中生长的样品显示出几乎相同的覆盖率。从溶液中生长的p-BDMT薄膜的单层堆积密度与烷基硫醇的单层堆积密度相似，如表面硫酸盐浓度所示。当从水蒸气中生长时，p-BDMT自组装膜得到了非常不同的结果。用XPS和面内电阻率测量观察到单层堆积密度比烷基硫醇高12-16%。研究还表明，当用溶液和气相方法生长自组装膜时，p-BDMT形成了多层膜。
Characteristics of decanethiol and 1,4-benzenedimethanethiol (p-BDMT) self-assembled monolayers (SAMs) grown using solution and vapor techniques were studied with X-ray photoelectron spectroscopy (XPS) and in-plane resistivity measurements. Self-assembled monolayers of decanethiol show nearly identical coverages for samples grown from solution and from vapor. Films of p-BDMT grown from solution show monolayer packing densities similar to those of alkanethiols, as indicated by the surface thiolate concentrations. A much different result is obtained for p-BDMT SAMs when grown from vapor. A monolayer packing density that is 12-16% higher than that of alkanethiols is observed with XPS and in-plane resistivity measurements. It is also shown that p-BDMT forms multilayers when SAMs are grown by both solution and vapor techniques.