The field of plasmonics has experienced rapid growth over the past decade with a host of emerging applications including single molecule sensing and plasmon-assisted catalysis. The vast majority of these applications use either silver or gold as the plasmonic metal, which are both high cost and face earth-abundance limitations in the next 100 years. Recent efforts have focused on taking advantage of the plasmonic properties of copper, a more abundant and low cost coinage metal as a sustainable route for plasmonic applications. In particular, there has been great interest in developing copper substrates capable of reliable and efficient enhancement of Raman signals for use in surface-enhanced Raman spectroscopy (SERS) sensing. Herein we describe a sequential electrodeposition technique whereby highly functional and robust Cu/Ag bimetallic SERS-active screen printed electrodes can be produced rapidly and at low cost, which display excellent plasmonic performance and are capable of supporting surface-plasmon assisted catalysis (SPAC). This modified screen printed electrode allows for the in situ spectroelectrochemical investigation of surface redox processes using a sustainable alternative to traditional monometallic electrodes.

中文翻译：

---

用于电化学表面增强拉曼光谱研究（EC-SERS）的电沉积双金属Cu / Ag纳米结构丝网印刷电极的评估

在过去的十年中，等离子体技术领域经历了快速的增长，其中包括单分子传感和等离子体辅助催化等一系列新兴应用。这些应用中的绝大多数使用银或金作为等离子体金属，这既成本高昂，又在未来100年内面临着地球丰度的局限。最近的努力集中在利用铜的等离子特性上，铜是一种更丰富，成本更低的造币金属，可作为等离子应用的可持续途径。特别地，人们对开发能够可靠和有效地增强拉曼信号以用于表面增强拉曼光谱（SERS）感测的铜基板非常感兴趣。在这里，我们描述了一种顺序电沉积技术，通过该技术可以快速，低成本地生产功能强大且功能强大的Cu / Ag双金属SERS活性丝网印刷电极，该电极显示出出色的等离激元性能，并且能够支持表面等离激元辅助催化（SPAC）。这种改良的丝网印刷电极允许使用传统单金属电极的可持续替代品对表面氧化还原过程进行原位光谱电化学研究。