Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea.
Center for Soft and Living Matter, Institute for Basic Science (IBS), 50 UNIST-gil, Ulsan 44919, Republic of Korea.
Nano Lett. 2023 Apr 26;23(8):3645-3652. doi: 10.1021/acs.nanolett.2c04467. Epub 2023 Mar 6.
The shaping of matter into desired nanometric structures with on-demand functionalities can enhance the miniaturization of devices in nanotechnology. Herein, strong light-matter interaction was used as an optical lithographic tool to tailor two-dimensional (2D) matter into nanoscale architectures. We transformed 2D black phosphorus (BP) into ultrafine, well-defined, beyond-diffraction-limit nanostructures of ten times smaller size and a hundred times smaller spacing than the incident, femtosecond-pulsed light wavelength. Consequently, nanoribbons and nanocubes/cuboids scaling tens of nanometers were formed by the structured ablation along the extremely confined periodic light fields originating from modulation instability, the tailoring process of which was visualized in real time via light-coupled transmission electron microscopy. The current findings on the controllable nanoscale shaping of BP will enable exotic physical phenomena and further advance the optical lithographic techniques for 2D materials.
通过按需赋予功能将物质塑造成所需的纳米结构，可以增强纳米技术中器件的小型化。在这里，强的光物质相互作用被用作光学光刻工具，将二维（2D）物质加工成纳米尺度的结构。我们将二维黑磷（BP）转化为超精细、定义良好、超越衍射极限的纳米结构，其尺寸比入射飞秒脉冲光的波长小十倍，间距小一百倍。因此，通过沿起源于调制不稳定性的极其受限的周期性光场进行结构化烧蚀，形成了数十纳米的纳米带和纳米立方体/长方体，其加工过程通过光耦合传输电子显微镜实时可视化。关于 BP 可控制纳米成型的当前发现将使奇异的物理现象成为可能，并进一步推进二维材料的光学光刻技术。
