Silicone transfer during microcontact printing
Silicone transfer during microcontact printing
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DOI：
10.1021/la026558x
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发表时间：
2003-06-24
期刊：
影响因子：
3.9
通讯作者：
Kasemo, B
中科院分区：
文献类型：
--
作者：
Glasmästar, K;Gold, J;Kasemo, B
微接触印刷（muCP）是一种广泛使用的在表面上制作微型图案的方法。在这项工作中，邮票材料的可能转移的问题，从邮票的基板冲压过程中得到解决。聚（二甲基硅氧烷）用于在SiOx、TiO 2和Au的基底上压印Milli-Q水或缓冲液。采用X射线光电子能谱（XPS）和飞行时间二次离子质谱（ToF-SIMS）对冲压前后的基板进行测量和表征，以检测冲压相关材料向基板的可能转移。XPS和ToF-SIMS分析均表明，与硅树脂相关的材料从平面印模转移，并且更多的材料从图案化印模转移。有趣的是，在上墨和压印之前对印模进行UV/臭氧处理（基本上是表面氧化）显著减少了有机硅转移。两个应用实例被用来说明在muCP：水冷凝模式和支持的脂质双层形成的有机硅转移到基板的重要性。
Microcontact printing (muCP) is a widely used method to make miniaturized patterns on surfaces. In this work, the issue of the possible transfer of stamp material from the stamp to the substrate during stamping was addressed. Poly(dimethylsiloxane) was used to stamp Milli-Q water or buffer on substrates of SiOx, TiO2, and Au. X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) were used to measure and characterize the substrate before and after stamping to detect the possible transfer of stamp-related material to the substrates. Both the XPS and the ToF-SIMS analyses show that silicone-related material is transferred from flat stamps and that even more material is transferred from patterned stamps. Interestingly, a UV/ozone treatment (essentially oxidation of the surface) of the stamps before inking and stamping significantly reduces the silicone transfer. Two application examples are used to illustrate the importance of silicone transfer to the substrates during muCP: water condensation patterns and supported lipid bilayer formation.