Guan Yuduo, Wang Zengyao, Gu Panpan, Wang Yu, Zhang Wei, Zhang Gang
State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P.R. China.
Nanoscale. 2019 May 16;11(19):9422-9428. doi: 10.1039/c9nr01297d.
An in situ SERS (surface-enhanced Raman scattering) study of plasmonic nanochemistry is realized on hierarchical Ag nanocone arrays ("hedgehog-like" arrays, denoted as HLAs) without any conventional catalyst. Ag nanocones are designed on 3D polystyrene (PS) microsphere arrays to provide a high density of hot spots within the laser-illumination area. Both experiments and numerical simulations demonstrate that the remarkable SERS and plasmonic catalytic performance of HLAs arise from the improved utilization rate of irradiation light in the third dimension and the tip enhancement effect of the nanocone arrays. On further combining their inherent SERS and catalytic properties, the in situ SERS study of plasmon-induced photocatalytic degradation reactions is realized. In this paper, not only the decomposition of methylene blue (MB) molecules is observed, but also the detailed molecular mechanisms of the reactions are revealed. Based on the bifunctional properties of the membrane-material interface, the HLAs are believed to be promising candidates in SERS and in situ SERS studies.
在没有任何传统催化剂的情况下，在分级银纳米锥阵列（“刺猬状”阵列，记为 HLA）上实现了等离子体纳米化学的原位表面增强拉曼散射（SERS）研究。银纳米锥设计在三维聚苯乙烯（PS）微球阵列上，以在激光照射区域内提供高密度的热点。实验和数值模拟均表明，HLA 的显著 SERS 和等离子体催化性能源于三维空间中照射光利用率的提高以及纳米锥阵列的尖端增强效应。进一步结合其固有的 SERS 和催化特性，实现了等离子体诱导光催化降解反应的原位 SERS 研究。在本文中，不仅观察到了亚甲基蓝（MB）分子的分解，还揭示了反应的详细分子机制。基于膜材料界面的双功能特性，HLA 被认为是 SERS 和原位 SERS 研究中有前景的候选材料。
