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Chiral nanohole arrays.
Nanoscale ( IF 5.8 ) Pub Date : 2020-01-09 , DOI: 10.1039/c9nr09722h Bin Ai 1 , Hoang M Luong 2 , Yiping Zhao 2
Nanoscale ( IF 5.8 ) Pub Date : 2020-01-09 , DOI: 10.1039/c9nr09722h Bin Ai 1 , Hoang M Luong 2 , Yiping Zhao 2
Affiliation
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Chiral nanohole array (CNA) films are fabricated by a simple and efficient shadow sphere lithography (SSL) method and achieve label-free enantiodiscrimination of biomolecules and drug molecules at the picogram level. The intrinsic mirror symmetry of the structure is broken by three subsequent depositions onto non-close packed nanosphere monolayers with different polar and azimuthal angles. Giant chiro-optical responses with a transmission as high as 45%, a chirality of 21°μm-1, and a g-factor of 0.17, respectively, are generated, which are among the largest values that have been reported in the literature. Such properties are due to the local rotating current density generated by a surface plasmon polariton as well as a strong local rotating field produced by localized surface plasmon resonance, which leads to the excitation of substantial local superchiral fields. The 70 nm-thick CNAs can achieve label-free enantiodiscrimination of biomolecules and drug molecules at the picogram level as demonstrated experimentally. All these advantages make the CNAs ready for low-cost, high-performance, and ultracompact polarization converters and label-free chiral sensors.
中文翻译：
手性纳米孔阵列。
手性纳米孔阵列（CNA）膜是通过简单有效的阴影球光刻（SSL）方法制造的，并在皮克级实现了无标记的生物分子和药物分子的对映异构。该结构的固有镜面对称性被三个随后的沉积破坏到具有不同极性和方位角的非紧密堆积纳米球单分子层上。产生了高达47％的透射率，21°μm-1的手性和0.17的g因子的巨大的手性光学响应，这是文献中报道的最大值。这些特性是由于表面等离激元极化产生的局部旋转电流密度以及局部表面等离振子共振产生的强局部旋转场所致，导致大量局部超手性场的激发。70 nm厚的CNA可以在皮克级实现生物分子和药物分子的无标记对映异构化，如实验所示。所有这些优点使CNA可以用于低成本，高性能，超紧凑型偏振转换器和无标签手性传感器。
更新日期：2020-01-09
中文翻译：
手性纳米孔阵列。
手性纳米孔阵列（CNA）膜是通过简单有效的阴影球光刻（SSL）方法制造的，并在皮克级实现了无标记的生物分子和药物分子的对映异构。该结构的固有镜面对称性被三个随后的沉积破坏到具有不同极性和方位角的非紧密堆积纳米球单分子层上。产生了高达47％的透射率，21°μm-1的手性和0.17的g因子的巨大的手性光学响应，这是文献中报道的最大值。这些特性是由于表面等离激元极化产生的局部旋转电流密度以及局部表面等离振子共振产生的强局部旋转场所致，导致大量局部超手性场的激发。70 nm厚的CNA可以在皮克级实现生物分子和药物分子的无标记对映异构化，如实验所示。所有这些优点使CNA可以用于低成本，高性能，超紧凑型偏振转换器和无标签手性传感器。
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