Kim Sanghoon, Jung Chunghwan, Mun Jungho, Kim Mooseong, Yoon Hyeongkeon, Jang Junho, Go Myeongcheol, Lee Jaeyong, Rho Junsuk, Kim Jin Kon
National Creative Research Initiative Center for Hybrid Nano Materials By High-Level Architectural Design of Block Copolymer, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
Nano Converg. 2022 Sep 7;9(1):40. doi: 10.1186/s40580-022-00331-9.
Stacked split-ring resonators (SSRR) arrays exhibiting polarization-sensitive dichroic responses in both visible and near-infrared wavelengths are realized over a centimeter-scale large area. The SSRR arrays are derived from pagoda-like nanorods fabricated from the self-assembly of a lamellae-forming polystyrene-b-poly (methyl methacrylate) copolymer (PS-b-PMMA) confined in cylindrical pores of anodized aluminum oxide (AAO) template. Along the nanorod direction, PS and PMMA nanodomains were alternately stacked with the same distance. Silver crescents and semi-hemispherical covers, which are essential for SSRR with the polarization sensitivity, were obliquely deposited on the single side of the nanorod after removing the AAO template and reactive-ion etching treatment. These sophisticated nanoscale architectures made by bottom-up fabrication can be applied to structural color, optical anti-counterfeiting, and commercial optical components in a large area.
在厘米级大面积上实现了在可见光和近红外波长范围内呈现偏振敏感二向色性响应的堆叠式分裂环谐振器（SSRR）阵列。这些SSRR阵列源自由层状形成的聚苯乙烯-b-聚（甲基丙烯酸甲酯）共聚物（PS-b-PMMA）自组装而成的宝塔状纳米棒，该共聚物被限制在阳极氧化铝（AAO）模板的圆柱形孔中。沿着纳米棒方向，PS和PMMA纳米域以相同的距离交替堆叠。在去除AAO模板并进行反应离子蚀刻处理后，将对具有偏振敏感性的SSRR至关重要的银月牙和半球形覆盖物倾斜沉积在纳米棒的单侧。通过自下而上制造方法制成的这些复杂的纳米级结构可应用于大面积的结构色、光学防伪和商业光学组件。
