Abstract Reliable and reusable plasmonic substrates are crucial for the development of biosensing applications using surface-enhanced Raman scattering (SERS), as they can provide unique advantages for ultrafast and accurate single-molecule recognition of different species. These properties are unrevealed in this paper, where thermally annealed cupric CuO and cuprous oxide Cu2O heterostructures were used as templates for highly stable nanotextured surfaces and design of robust 3D plasmonic biochips. Differently tailored nano/micro-roughness provided outstanding light trapping abilities that lead to significant SERS performance improvement. It was found that Cu2O chestnut-like substrate activated with 80 nm Au/Pd alloy film reveals impressive 3.7-fold Raman signal increment in respect to grainy-like structure and about twice larger amplification than that of nanowires enriched platform decorated in the same manner. Large enhancement factor AEF ~5 × 105 of a chestnut-like Au/Pd@/Cu2O chip allows adding it up to the list of the most effective oxide-based plasmonic substrates. Moreover, the substrate shows unprecedented durability during repetitive plasma-cleaning, demonstrating a remarkable 100% self-recovery in less than 1 min, accompanied by virtually no thickness degradation of the plasmonic layer.

中文翻译：

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可重复使用的 Au/Pd 涂层板栗状氧化铜 SERS 基板，具有超快速自恢复能力

摘要 可靠且可重复使用的等离子体基质对于使用表面增强拉曼散射 (SERS) 的生物传感应用的发展至关重要，因为它们可以为不同物种的超快速和准确单分子识别提供独特的优势。这些特性在本文中没有揭示，其中热退火的铜 CuO 和氧化亚铜 Cu2O 异质结构被用作高度稳定的纳米纹理表面的模板，并设计了坚固的 3D 等离子体生物芯片。不同定制的纳米/微米粗糙度提供了出色的光捕获能力，从而显着提高了 SERS 性能。发现用 80 nm Au/Pd 合金膜激活的 Cu2O 栗子状衬底显示出令人印象深刻的 3。颗粒状结构的拉曼信号增量为 7 倍，放大倍数比以相同方式装饰的富含纳米线的平台大两倍。栗子状 Au/Pd@/Cu2O 芯片的大增强因子 AEF ~5 × 105 允许将其添加到最有效的基于氧化物的等离子体基板列表中。此外，基板在重复等离子清洗过程中表现出前所未有的耐用性，在不到 1 分钟的时间内表现出显着的 100% 自我恢复，同时几乎没有等离子体层的厚度退化。