Omnidirectional Polymer Nanohairs Fabricated Under Ambient Condition
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Nanostructured surfaces(NSSs) with high aspect ratio(AR) inspired by nature are widely studied due to their attractive applications. Of the various architectures, it has been reported that randomly oriented or aperiodic nanopillars effectively suppress the reflection by either light scattering or tuning the refractive index. In this letter, we report a simple yet effective method for the preparation of randomly stooped polymeric nanohairs under ambient pressure. This method features compatibility with high-throughput and large-area fabrication because it does not require any demanding conditions. Severely scattered electrons trajected into the ambient air pressure facilitate random stooping of prepared nanohairs due to random volume shrinkage. Fourier-transform infrared spectroscopy measurements and Monte Carlo simulation of electron trajectory were performed to analyze the radiolysis reaction and the distributed incident angle of scattered electrons into the nanohairs, respectively.