Brown Treva T, Lejeune Zorabel M, Liu Kai, Hardin Sean, Li Jie-Ren, Rupnik Kresimir, Garno Jayne C
Chemistry Department and the Center for BioModular Multi-Scale Systems, 232 Choppin Hall, Louisiana State University, Baton Rouge, LA 70803.
J Lab Autom. 2011 Apr 1;16(2):112-125. doi: 10.1016/j.jala.2010.06.003.
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 (SPL) 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进行编程，以实现自动光刻，从而生成有机薄膜纳米图案（如正烷硫醇自组装单分子层，即SAMs）的所需表面排列。在本报告中，被称为纳米刮削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。商用仪器提供软件来控制针尖扫描运动的长度、方向、速度和施加力。对于纳米刮削，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。纳米接枝是通过力诱导基质SAM分子的位移来完成的，随后溶液中的正烷硫醇分子立即进行表面自组装。AFM自动化的进展实现了用于纳米光刻的快速方案，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（SPL）的示例实验，这些实验是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。
