We present ensembles of surface-ordered nanoparticle arrangements, which are formed by template-assisted self-assembly of monodisperse, protein-coated gold nanoparticles in wrinkle templates. Centimeter-squared areas of highly regular, linear assemblies with tunable line width are fabricated and their extinction cross sections can be characterized by conventional UV/vis/NIR spectroscopy. Modeling based on electrodynamic simulations shows a clear signature of strong plasmonic coupling with an interparticle spacing of 1–2 nm. We find evidence for well-defined plasmonic modes of quasi-infinite chains, such as resonance splitting and multiple radiant modes. Beyond elementary simulations on the individual chain level, we introduce an advanced model, which considers the chain length distribution as well as disorder. The step toward macroscopic sample areas not only opens perspectives for a range of applications in sensing, plasmonic light harvesting, surface enhanced spectroscopy, and information technology but also eases the investigation of hybridization and metamaterial effects fundamentally.
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机译:我们目前的表面有序的纳米粒子排列的合奏,这是由皱纹模板中的单分散,蛋白包被的金纳米粒子的模板辅助自组装形成的。制造高度规则的线形组件(具有可调的线宽)的平方厘米面积,并且其消光截面可以通过常规的UV / vis / NIR光谱进行表征。基于电动力学模拟的建模显示出强等离子体耦合的清晰特征,粒子间距为1-2 nm。我们找到了准无限链的明确定义的等离激元模式的证据,例如共振分裂和多重辐射模式。除了在单个链级别上的基本模拟之外,我们还引入了一种高级模型,该模型考虑了链长分布以及无序性。向宏观样品区域迈出的步伐不仅为传感,等离子光收集,表面增强光谱学和信息技术的一系列应用打开了视野,而且从根本上简化了杂交和超材料效应的研究。
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