Zhang Lisheng, Zhang Yiyuan, Wang Xueyan, Zhang Duan
The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Department of Physics, Capital Normal University, Beijing 100048, China.
Nanomaterials (Basel). 2021 Oct 14;11(10):2710. doi: 10.3390/nano11102710.
Various effects caused by surface plasmons including enhanced electromagnetic field, local heating, and excited electrons/holes can not only redistribute the electromagnetic field in the time domain and space but also redistribute the excited carriers and drive chemical reactions. In this study, firstly, an Au nanoporous array photocatalyst with the arrayed gauge was prepared by means of the anodic alumina template. Then, the formation of 4,4'-dimercaptoazobenzene (DMAB) by the surface plasmon-driven photocatalysis under 633 nm laser irradiation was investigated by means of Raman spectroscopy using aminothiophenol (PATP) as a probe molecule on gold nananoporous arrays. In addition, sodium borohydride was introduced in situ to realize the reverse photocatalytic reaction driven by the surface plasma. With the help of FDTD software, the plasma distribution characteristics on the surface of Au nanoporous arrays were simulated and analyzed. Through this practical method, it is expected to draw specific graphics, letters, and Chinese characters on the micro/nano scale, and realize the functions of graphics drawing, information encryption, reading, and erasing on the micro/nano scale.
表面等离子体激元引起的各种效应，包括增强的电磁场、局部加热以及激发的电子/空穴，不仅可以在时域和空间中重新分布电磁场，还可以重新分布激发的载流子并驱动化学反应。在本研究中，首先，通过阳极氧化铝模板制备了具有阵列规格的金纳米多孔阵列光催化剂。然后，以氨基硫酚（PATP）作为金纳米多孔阵列上的探针分子，利用拉曼光谱研究了在633nm激光照射下表面等离子体激元驱动的光催化作用下4,4'-二巯基偶氮苯（DMAB）的形成。此外，原位引入硼氢化钠以实现表面等离子体驱动的逆光催化反应。借助FDTD软件，对金纳米多孔阵列表面的等离子体分布特性进行了模拟和分析。通过这种实用方法，有望在微/纳米尺度上绘制特定的图形、字母和汉字，并实现微/纳米尺度上的图形绘制、信息加密、读取和擦除功能。
