Flexible Surface-enhanced Raman Scattering Strips Using Colloidal Ink of Gold-silver Alloyed Nanoparticles

IF 3.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2023-05-17 DOI:10.1007/s11468-023-01872-3

Honghao Tian, Youjian Qin, Hongmei Liu, Tian Li, Yuting Li, Xiaohui Fang, Xinping Zhang

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引用次数: 0

Abstract

Surface-enhanced Raman scattering (SERS) has been used for trace detection at the single-molecule level. The low-cost preparation of high-performance test strips has enabled the development of SERS techniques. In this study, oil-dispersible metal or alloy nanoparticles prepared by the Brust-Schiffrin method were used as "inks" in a ballpoint pen to handwrite SERS test strips on polytetrafluoroethylene (PTFE) membranes. Because of the good PTFE lipophilicity, the flexible substrates had good uniformity. The large laser damage threshold of the PTFE membrane also enabled increased laser powers for SERS testing. The Au and Ag alloy nanoparticle inks exhibited increased performance with larger proportions of Ag. The Au₁Ag₈ nanoparticles had the best properties, and those strips could detect 10^-11-M Rhodamine 6G dyes in a 10-μL volume with an enhancement factor of 5.4×10⁸. The SERS strips were used to demonstrate detection of malachite green, the use of which is prohibited in aquaculture and fish tanks.

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用金-银合金纳米颗粒胶体墨水制备柔性表面增强拉曼散射带

表面增强拉曼散射(SERS)已被用于单分子水平的痕量检测。高性能测试条的低成本制备使SERS技术得以发展。在本研究中，采用Brust-Schiffrin方法制备的油分散金属或合金纳米颗粒作为圆珠笔中的“墨水”，在聚四氟乙烯(PTFE)膜上手写SERS测试条。由于聚四氟乙烯具有良好的亲脂性，使得柔性基板具有良好的均匀性。PTFE膜的大激光损伤阈值也使SERS测试的激光功率增加。随着银含量的增加，金、银合金纳米颗粒油墨的性能有所提高。其中，Au1Ag8纳米颗粒性能最好，在10 μ l的体积内可检测到10-11- m罗丹明6G染料，增强因子为5.4×108。SERS条用于检测孔雀石绿，孔雀石绿是禁止在水产养殖和鱼缸中使用的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.