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Hedgehog Inspired CuO Nanowires/Cu2O Composites for Broadband Visible‐Light‐Driven Recyclable Surface Enhanced Raman Scattering
Advanced Optical Materials ( IF 9 ) Pub Date : 2018-02-06 , DOI: 10.1002/adom.201701167 Kaichen Xu 1, 2 , Huangping Yan 3 , Chuan Fu Tan 1 , Yuyao Lu 1, 4 , Yang Li 1 , Ghim Wei Ho 1 , Rong Ji 2 , Minghui Hong 1
Advanced Optical Materials ( IF 9 ) Pub Date : 2018-02-06 , DOI: 10.1002/adom.201701167 Kaichen Xu 1, 2 , Huangping Yan 3 , Chuan Fu Tan 1 , Yuyao Lu 1, 4 , Yang Li 1 , Ghim Wei Ho 1 , Rong Ji 2 , Minghui Hong 1
Affiliation
Self‐cleanable surface‐enhanced Raman scattering (SERS) spectroscopy affords a promising route toward environment‐friendly biosensors for point‐of‐care diagnostics. It is of great importance to develop recyclable SERS substrates driven by a photocatalytic decomposition process, especially in the visible range. In this work, inspired by the hedgehog‐like structures, a broadband visible‐light‐driven photocatalytic SERS platform with the CuO nanowires (NWs)/Cu2O hetero‐nanostructures as the backbone is demonstrated. Via employing the approach of nanosecond laser ablation on Cu sheet coupled with subsequent thermal oxidation, the formed hedgehog‐like, high‐density, and dual‐scale micro/nanostructures not only demonstrate enhanced broadband visible‐light‐absorption capability even extended to the near infrared range but also exhibit boosted interfacial adhesion with favorable stability. Such phenomena imply that the binary oxidized Cu composites decorated with metallic nanoparticles can serve as high‐performance SERS substrates with superior recyclability. Under the visible light illumination, the as‐fabricated ternary Ag/CuO NWs/Cu2O composites can be self‐cleaned by photocatalytic degradation of adsorbates, thus leading to recyclable SERS substrates, which can preserve more than 85% SERS activity after seven cycles' measurement. These results pave a new path to realize reusable SERS substrates in the applications of remote and resource‐limited environments toward next‐generation green biosensors.
中文翻译:
刺猬启发的CuO纳米线/ Cu2O复合材料,用于宽带可见光驱动的可回收表面增强拉曼散射
自清洁表面增强拉曼散射(SERS)光谱学为通往现场诊断的环境友好型生物传感器提供了一条有希望的途径。开发特别是在可见光范围内,通过光催化分解过程驱动的可回收SERS基质非常重要。在这项工作中,受类似刺猬的结构的启发,该宽带可见光驱动的光催化SERS平台具有CuO纳米线(NWs)/ Cu 2证明了以异质纳米结构为骨架。通过在铜片上采用纳秒激光烧蚀的方法以及随后的热氧化,所形成的刺猬状,高密度和双尺度微/纳米结构不仅显示出增强的宽带可见光吸收能力,甚至还扩展到了近距离。红外范围,但也显示出增强的界面附着力和良好的稳定性。这种现象表明,用金属纳米颗粒装饰的二元氧化铜复合材料可以用作具有优异可回收性的高性能SERS基材。在可见光照射下,三元Ag / CuO NWs / Cu 2O复合材料可以通过吸附剂的光催化降解而自清洁,从而形成可回收的SERS底物,在七个周期的测量后,其可以保留超过85%的SERS活性。这些结果为在偏远和资源有限的环境中向下一代绿色生物传感器的应用中实现可重复使用的SERS底物铺平了一条新道路。
更新日期:2018-02-06
中文翻译:
刺猬启发的CuO纳米线/ Cu2O复合材料,用于宽带可见光驱动的可回收表面增强拉曼散射
自清洁表面增强拉曼散射(SERS)光谱学为通往现场诊断的环境友好型生物传感器提供了一条有希望的途径。开发特别是在可见光范围内,通过光催化分解过程驱动的可回收SERS基质非常重要。在这项工作中,受类似刺猬的结构的启发,该宽带可见光驱动的光催化SERS平台具有CuO纳米线(NWs)/ Cu 2证明了以异质纳米结构为骨架。通过在铜片上采用纳秒激光烧蚀的方法以及随后的热氧化,所形成的刺猬状,高密度和双尺度微/纳米结构不仅显示出增强的宽带可见光吸收能力,甚至还扩展到了近距离。红外范围,但也显示出增强的界面附着力和良好的稳定性。这种现象表明,用金属纳米颗粒装饰的二元氧化铜复合材料可以用作具有优异可回收性的高性能SERS基材。在可见光照射下,三元Ag / CuO NWs / Cu 2O复合材料可以通过吸附剂的光催化降解而自清洁,从而形成可回收的SERS底物,在七个周期的测量后,其可以保留超过85%的SERS活性。这些结果为在偏远和资源有限的环境中向下一代绿色生物传感器的应用中实现可重复使用的SERS底物铺平了一条新道路。