Silver Nanowire-Gold Plasmonic Nanostars SERS Detection of Dissolved Acetone in Oil
LUO Wen-xuan1, WAN Fu2*
1. North China Electric Power University (Baoding), Baoding 071003, China
2. State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Abstract：Oil-paper insulation equipment is one of the key components in power systems, and accurately assessing the aging status of electrical equipment's oil-paper insulation is crucial for ensuring the safety of power grids. Acetone is an important indicator of the aging process of insulation paper, and the rapid, sensitive, and accurate determination of acetone content dissolved in insulation oil is of significant importance in evaluating the aging of oil-paper insulation systems. In this study, a surface-enhanced Raman scattering (SERS) substrate based on silver nanowires (AgNWs) decorated with gold nanostars (AuNSts) was successfully prepared on a silicon-gold (Si-Au) film surface using the ion sputtering method. This substrate was utilized for rapid assessment of acetone content in insulation oil. Morphological characterization of the substrate by scanning electron microscopy revealed that the dual-metal satellite-surrounded structure formed by smaller gold nanoparticles sputtered onto the larger surface area of AgNWs not only effectively enhanced surface plasmon resonance but also provided a protective barrier layer for AgNWs, significantly improving the overall antioxidant performance of the substrate. SERS detection results showed that compared to Si-Au, Si-Au-AgNWs, and Si-AgNWs-AgNts substrates, the Si-Au-AgNWs-AuNSts substrate exhibited superior SERS performance, with the lowest detection limit of 40 mg·L-1 for acetone dissolved in insulation oil after water (H2O) extraction. Moreover, the substrate demonstrated high consistency and stability, with an RSD value of 4.87%, and after 30 days, the target peak signal only decreased by 6.14%. This method provides an effective approach for achieving reliable on-site detection of acetone dissolved in oil.
[1] Lei Y, Xia Y Y, Wang C D, et al. Talanta, 2023, 265: 124796.
[2] PENG Lei, FU Qiang, LI Li, et al(彭 磊, 付 强, 李 丽, 等). Transformer(变压器), 2019, 56(3): 50.
[3] LIU Xiao-hong, DENG Hua, CHANG Lin, et al(刘小红, 邓 华, 常 林, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2020, 40(10): 3038.
[4] Thiviyanathan V A, Ker P J, Leong Y S, et al. Alexandria Engineering Journal, 2022, 61(10): 7697.
[5] AJ C, Salam M A, Rahman Q M, et al. Renewable and Sustainable Energy Reviews, 2018, 82: 1442.
[6] Chen W G, Gu Z L, Zou J X, et al. IEEE Transactions on Dielectrics and Electrical Insulation, 2016, 23(2): 915.
[7] WANG Hong, LIU Xiao-wei, WANG Zhen-jun, et al(王 宏, 刘孝为, 王振军, 等). High Voltage Apparatus(高压电器), 2008，44(5): 395.
[8] Zheng X S, Jahn I J, Weber K, et al. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2018, 197: 56.
[9] Zou J X, Chen W G, Wan F, et al. Energies, 2016, 9(11): 946.
[10] Pham T B, Hoang T H C, Pham V H, et al. Scientific Reports, 2019, 9(1): 238.
[11] ZHANG Cai-juan, XIE Bi-hai(张彩娟，谢碧海). Zhejiang Journal of Preventive Medicine(浙江预防医学), 2001, 13(8): 65.
[12] Muhammad M, Guo G H, Zhong J, et al. Talanta, 2020, 207: 120324.
[13] Saatkamp C J, De Almeida M L, Bispo J A, et al. Journal of Biomedical Optics, 2016, 21(3): 03700 1.
[14] Gu Z L, Chen W G, Du L, et al. Journal of Applied Spectroscopy, 2018, 85(2): 225.
[15] Milligan K, Shand N C, Graham D, et al. Analytical Chemistry, 2020, 92(4): 3253.
[16] LIU Wen-jing, DU Jing-jing, JING Chuan-yong(刘文婧, 杜晶晶, 景传勇). Environmental Chemistry(环境化学), 2014, 33(2): 217.
[17] ZOU Ting-ting, XU Zhen-lin, YANG Jin-yi, et al(邹婷婷, 徐振林, 杨金易, 等). Journal of Instrumental Analysis(分析测试学报), 2018, 37(10): 1174.
[18] Shi H Y, Chen W G, Wan F, et al. Nanomaterials, 2019, 9: 17.
[19] Lei Y, Wang C D, Kong M P, et al. High Voltage, 2023, 8(2): 293.
[20] Tao A, Kim F, Hess C, et al. Nano Letters, 2003, 3(9): 1229.
