等离子体金属纳米结构在SERS传感及可穿戴应力传感中的应用

等离子体金属(金、银)纳米结构因其特有的理化性能,被广泛应用于表面增强拉曼散射(Surface-enhanced Raman scattering,SERS)传感及可穿戴应力传感领域。其中,SERS是一种应用贵金属纳米材料增强拉曼散射信号的检测技术,该技术灵敏度高、特异性强,已被广泛用于生物医学、环境监测、食品药品检测等领域。随着电子检测技术和柔性电子材料的快速发展,柔性可穿戴传感技术也得到了快速发展,且取得了大量的研究成果。SERS检测技术主要依赖于贵金属纳米增强基底材料,而基于贵金属纳米结构的可穿戴传感元件对人体微应力、微应变的传感具有极高的灵敏度。SERS增强基底材料与可穿戴应力传感元件材料具有互通互用性,将贵金属纳米SERS基底应用于柔性可穿戴式检测,这是SERS检测技术比较新颖的、尚未深入研究的应用领域之一。该文综述了贵金属溶胶纳米结构的材料组成分类以及该类材料在SERS和可穿戴应力传感中的应用,并分析了胶体贵金属纳米结构组成及成分对SERS传感、可穿戴应力传感灵敏度、可重复性及稳定性的影响,最后展望了贵金属胶体纳米结构在SERS传感和柔性可穿戴应用中的发展趋势。

ReviewsApplications of Nanostructures of Plasma Metals at the Territory of Surfaceenhanced Raman Scattering Sensing and Wearable Stress Sensing

Plasma metals(gold,silver) nanostructures are widely used in surface enhanced Raman scattering(SERS) and wearable stress sensing fields due to their unique physical and chemical properties.Among them,SERS is a kind of detection technology using plasma metal nanomaterials to enhance Raman scattering singal.It has high sensitivity and speciticity,and has been widely used in biomedical analysis,environmental monitoring,food and drug detection and other fields.With the rapid development of electronic detection technique and flexible electronic materials,flexible wearable sensing technique has also been developed rapidly,and a large number of research achievements have been obtained.SERS detection technique mainly relies on substrate materials of plasma metals,and wearable sensing elements based on Plasma metal nanostructures have extremely high sensitivity to human micro stress and micro strain.As SERS reinforced substrate materials and wearable stress sensor materials contain interoperability,application of SERS plasma metal nano substrate in flexible wearable detection is one of the application fields which is relatively new but not yet deeply studied.Therefore,the material composition classification of plasma metal sol nanostructures and their applications in SERS and wearable stress sensing are reviewed in this paper.Moreover,effects of these nanostructures on the sensitivity,repeatability and stability of SERS sensing and wearable stress sensing has been investigated.The development trend of precious metal colloidal nanostructures in SERS sensing and flexible wearable sensing elements is also forecasted.