Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton 3800, Victoria Australia.
School of Science, RMIT University, Melbourne 3000, Victoria Australia.
Nano Lett. 2021 Jan 13;21(1):389-396. doi: 10.1021/acs.nanolett.0c03779. Epub 2020 Dec 18.
In parallel to the burgeoning field of soft electronics, soft plasmonics focuses on the design and fabrication of plasmonic structures supported on elastomers and to understand how their properties respond to mechanical deformations. Here, we report on a partial ligand-stripping strategy to fabricate elastomer-supported gold nanobipyramid (NBP) plasmene nanosheets. Unlike spherelike building blocks, NBP-building blocks display complex orientation-dependent plasmonic responses to external strains. By collecting polarized plasmonic resonance spectra in conjunction with electrostatic eigenmode modeling, we reveal simultaneous changes in interparticle spacing and spatial orientations of NBP building blocks under mechanical strains. Such changes are directly related to initial NBP packing orders. Further analysis of strain sensitivities for various NBP plasmenes indicated that plasmonic spectra of ∼45° oriented samples are mostly susceptible to strain at acute polarized angles. The results presented may enable novel applications in future soft optoelectronic devices in sensing, encryption, and data storage.
与蓬勃发展的软电子学并行，软等离子体学专注于设计和制造在弹性体上支撑的等离子体结构，并了解它们的性能如何响应机械变形。在这里，我们报告了一种部分配体剥离策略，用于制造弹性体支撑的金纳米双锥（NBP）等离子体纳米片。与球形构建块不同，NBP 构建块对外界应变表现出复杂的取向依赖的等离子体响应。通过收集偏振等离子体共振谱并结合静电本征模式建模，我们揭示了在机械应变下纳米粒子间间距和 NBP 构建块空间取向的同时变化。这种变化与初始 NBP 堆积顺序直接相关。对各种 NBP 等离子体的应变敏感性的进一步分析表明，约 45°取向样品的等离子体光谱在锐角偏振角下最容易受到应变的影响。所呈现的结果可能为未来在传感、加密和数据存储等方面的软光电设备中的应用提供新的途径。
