Mullen Thomas J, Dameron Arrelaine A, Weiss Paul S
Departments of Chemistry and Physics, The Pennsylvania State University, 104 Davey Lab, University Park, PA 16802-6300, USA.
J Phys Chem B. 2006 Jul 27;110(29):14410-7. doi: 10.1021/jp0604342.
Separated domains of 1-dodecanethiolate were fabricated via solution displacement of preformed 1-adamantanethiolate self-assembled monolayers on Au{111}. Subsequently, the 1-adamantanethiolate domains were desorbed selectively, and the substrate was exposed to a 1-octanethiol solution, creating artificially separated self-assembled monolayers of 1-dodecanethiolate and 1-octanethiolate. The molecular order of each lattice type and the apparent height differences imaged with scanning tunneling microscopy and the two distinct cathodic peaks observed with cyclic voltammetry indicated distinct separated domains of each lattice type in the separated self-assembled monolayers. By manipulating the intermolecular interaction strengths of the patterned molecules, we are able to control the structure and properties of the separated self-assembled monolayers via the exploitation of competitive adsorption and the utilization of electrochemical processing, which can be extended to other self-assembly patterning techniques such as microdisplacement printing.
通过对预先形成的1-金刚烷硫醇自组装单分子层在Au{111}上进行溶液置换，制备了1-十二烷硫醇的分离域。随后，选择性地解吸1-金刚烷硫醇域，并将基底暴露于1-辛烷硫醇溶液中，从而形成了1-十二烷硫醇和1-辛烷硫醇的人工分离的自组装单分子层。用扫描隧道显微镜成像的每种晶格类型的分子有序性和表观高度差，以及用循环伏安法观察到的两个不同的阴极峰，表明在分离的自组装单分子层中每种晶格类型都有明显的分离域。通过操纵图案化分子的分子间相互作用强度，我们能够通过利用竞争吸附和电化学处理来控制分离的自组装单分子层的结构和性质，这可以扩展到其他自组装图案化技术，如微位移印刷。
