莱克多巴胺
拉曼散射
表面等离子共振
等离子体子
纳米技术
材料科学
检出限
瑞利散射
拉曼光谱
化学
光电子学
纳米颗粒
光学
色谱法
物理
作者
Liqin Zheng,Fan Hu,Yueyue Zhao,Juanjuan Zhu,Xian Wang,Mengke Su,Honglin Liu
标识
DOI:10.1021/acs.jafc.3c06475
摘要
Highly sensitive and reliable detection of β-adrenergic agonists is especially necessary due to the illegal abuse of growth-promoting feed additives. Here, we develop a novel surface plasmon resonance/surface-enhanced Raman scattering (SPR/SERS) dual-mode plasmonic sensor based on core–satellite nanoassemblies for the highly sensitive and reliable detection of ractopamine (RAC). The addition of RAC results in the decomposition of core–satellite nanoassemblies and consequently changes the Rayleigh scattering color of dark-field microscopy (DFM) images and the Raman scattering intensity of SERS spectra. The excellent sensitivity, specificity, and uniformity of this strategy were confirmed by detecting RAC in various complex media in the farm-to-table chain, and the limit of detection (LOD) was 0.03 ng/mL in an aqueous solution. In particular, the convenient access to livestock sewage not only ensures animal welfare but also provides great convenience for the market regulation of β-agonists. The success of our on-site strategy only with a portable Raman device promises great application prospects for β-agonist detection.
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