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首页> 外文期刊>Nanotechnology >Branched poly(ethyleneimine): a versatile scaffold for patterning polymer brushes by means of remote photocatalytic lithography
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Branched poly(ethyleneimine): a versatile scaffold for patterning polymer brushes by means of remote photocatalytic lithography

机译：支链聚（乙烯亚胺）：通过远程光催化光刻进行图案化聚合物刷的多功能支架

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Patterning of functional surfaces is one of the cornerstones of nanotechnology as it allows the fabrication of sensors and lab-on-a-chip devices. Here, the patterning of self-assembled monolayers of branched poly(ethyleneimine) (bPEI) on silica was achieved by means of remote photocatalytic lithography. Moreover, when 2-bromoisobutyryl-modified bPEI was used, the resulting pattern could be amplified by grafting polymer brushes by means of surface-initiated atom transfer radical polymerization. In contrast to previous reports for the patterning of bPEI, the present approach can be conducted in minutes instead of hours, reducing the exposure time to UV radiation and enhancing the overall efficiency. Furthermore, our approach is much more user-friendly, allowing a facile fabrication of patterned initiator-modified surfaces and the use of inexpensive instrumentation such as a low-power UV source and a simple photomask. Considering the versatility of bPEI as a scaffold for the development of biosensors, patterning by means of remote photocatalytic lithography will open new opportunities in a broad field of applications.
机译：功能表面的图案化是纳米技术的基石之一，因为它允许制造传感器和芯片装置的制造。这里，通过远程光催化光刻实现了二氧化硅上的分支聚（乙烯亚胺）（BPEI）的自组装单层的图案化。此外，当使用2-溴二异丁酰基改性的BPEI时，通过通过表面引发的原子转移自由基聚合通过接枝聚合物刷来扩增所得图案。与之前的BPEI的图案化的报告相反，本方法可以在几分钟而不是小时内进行，将暴露时间降低到UV辐射并提高整体效率。此外，我们的方法更加用户友好，允许图案化发起者改进的表面的容易制造和使用廉价的仪器，例如低功率UV源和简单的光掩模。考虑到BPEI作为脚手架进行生物传感器的脚手架，通过远程光催化光刻进行图案，将在广泛的应用领域开辟新的机会。

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