Brown Treva T, LeJeune Zorabel M, Liu Kai, Hardin Sean, Li Jie-Ren, Rupnik Kresimir, Garno Jayne C
Chemistry Department and Center for BioModular Multi-Scale Systems, Louisiana State University, Baton Rouge, LA 70803, USA.
J Lab Autom. 2011 Apr;16(2):112-25. doi: 10.1016/j.jala.2010.06.003. Epub 2010 Oct 6.
Controllers for scanning probe instruments can be programmed for automated lithography to generate desired surface arrangements of nanopatterns of organic thin films, such as n-alkanethiol self-assembled monolayers (SAMs). In this report, atomic force microscopy (AFM) methods of lithography known as nanoshaving and nanografting are used to write nanopatterns within organic thin films. Commercial instruments provide software to control the length, direction, speed, and applied force of the scanning motion of the tip. For nanoshaving, higher forces are applied to an AFM tip to selectively remove regions of the matrix monolayer, exposing bare areas of the gold substrate. Nanografting is accomplished by force-induced displacement of molecules of a matrix SAM, followed immediately by the surface self-assembly of n-alkanethiol molecules from solution. Advancements in AFM automation enable rapid protocols for nanolithography, which can be accomplished within the tight time restraints of undergraduate laboratories. Example experiments with scanning probe lithography will be described in this report that were accomplished by undergraduate students during laboratory course activities and research internships in the chemistry department of Louisiana State University. Students were introduced to principles of surface analysis and gained "hands-on" experience with nanoscale chemistry.
扫描探针仪器的控制器可以编程用于自动光刻，以生成有机薄膜纳米图案的所需表面排列，例如正烷硫醇自组装单分子层（SAMs）。在本报告中，被称为纳米剃须和纳米接枝的原子力显微镜（AFM）光刻方法被用于在有机薄膜内写入纳米图案。商业仪器提供软件来控制针尖扫描运动的长度、方向、速度和作用力。对于纳米剃须，向AFM针尖施加更高的力，以选择性地去除基质单分子层的区域，露出金基底的裸露区域。纳米接枝是通过基质SAM分子的力诱导位移来完成的，随后溶液中的正烷硫醇分子立即进行表面自组装。AFM自动化的进展使得纳米光刻的快速方案成为可能，这可以在本科实验室严格的时间限制内完成。本报告将描述扫描探针光刻的示例实验，这些实验是由路易斯安那州立大学化学系的本科生在实验室课程活动和研究实习期间完成的。学生们学习了表面分析原理，并获得了纳米尺度化学的“实践”经验。
