Kiremitler N Burak, Pekdemir Sami, Patarroyo Javier, Karabel Sema, Torun Ilker, Puntes Victor F, Onses M Serdar
Department of Materials Science and Engineering, Nanotechnology Research Center (ERNAM), Erciyes University, Kayseri, 38039, Turkey.
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain.
ACS Macro Lett. 2017 Jun 20;6(6):603-608. doi: 10.1021/acsmacrolett.7b00288. Epub 2017 May 22.
This paper presents electrospin nanolithography (ESPNL) for versatile and low-cost fabrication of nanoscale patterns of polymer brushes to serve as templates for assembly of metallic nanoparticles. Here electrospun nanofibers placed on top of a substrate grafted with polymer brushes serve as masks. The oxygen plasma etching of the substrate followed by removal of the fibers leads to linear patterns of polymer brushes. The line-widths as small as ∼50 nm can be achieved by precise tuning of the diameter of fibers, etching condition, and fiber-substrate interaction. Highly aligned and spatially defined patterns can be fabricated by operating in the near-field electrospinning regime. Patterns of polymer brushes with two different chemistries effectively directed the assembly of gold nanoparticles and silver nanocubes. Nanopatterned brushes imparted strong confinement effects on the assembly of plasmonic nanoparticles and resulted in strong localization of electromagnetic fields leading to intense signals in surface-enhanced Raman spectroscopy. The scalability and simplicity of ESPNL hold great promise in patterning of a broad range of polymer thin films for different applications.
本文介绍了用于多功能且低成本制造聚合物刷纳米级图案的静电纺丝纳米光刻技术（ESPNL），这些图案可作为金属纳米颗粒组装的模板。在此，置于接枝有聚合物刷的基底顶部的静电纺丝纳米纤维用作掩膜。对基底进行氧等离子体蚀刻，随后去除纤维，可得到聚合物刷的线性图案。通过精确调节纤维直径、蚀刻条件以及纤维与基底的相互作用，可实现低至约50纳米的线宽。通过在近场静电纺丝模式下操作，可制造出高度对齐且空间定义明确的图案。具有两种不同化学性质的聚合物刷图案有效地引导了金纳米颗粒和银纳米立方体的组装。纳米图案化刷对等离子体纳米颗粒的组装施加了强大的限制作用，并导致电磁场的强烈局域化，从而在表面增强拉曼光谱中产生强烈信号。ESPNL的可扩展性和简单性在为不同应用对多种聚合物薄膜进行图案化方面具有巨大潜力。
