化学
罗丹明6G
检出限
溴化物
孔雀绿
甲苯胺酮
分子
聚苯乙烯
结晶紫
硫堇
胶体金
毒品检测
组合化学
阳离子聚合
无机化学
核化学
色谱法
纳米技术
纳米颗粒
有机化学
吸附
物理化学
医学
材料科学
电极
病理
电化学
聚合物
作者
Muhammad Usman Amin,Lingwei Li,Ruiyuan Zhang,Jixiang Fang
出处
期刊:Talanta
[Elsevier]
日期:2023-01-01
卷期号:251: 123800-123800
被引量:7
标识
DOI:10.1016/j.talanta.2022.123800
摘要
In recent years, surface-enhanced Raman spectroscopy (SERS) has been widely used in various fields for the rapid detection of trace-level molecular targets. In this study, we have developed a simple and effective solution-based SERS protocol to improve the activity for the detection of cationic dye molecules in aquaculture. The polystyrene sulfonate functionalized gold nanobipyramids (PSS-Au BPs) were synthesized from the cetyltrimethylammonium bromide (CTAB) reaction system followed by the ligand exchange process. The halide ions-induced aggregation of PSS-Au BPs was carried out by using four type of different salts such as NaCl, NaBr, MgCl2 and MgSO4 to investigate their influence on the SERS activity. The results demonstrate that the ionic strength of the solution has an important impact on the colloidal stability and SERS activity. The PSS-Au BPs show an improved SERS sensitivity at lower concentrations of the aggregating agents in solution-based SERS by detecting the crystal violet (CV) molecules with a limit of detection (LOD) to 3.28 × 10-11 M. Furthermore, to demonstrate the generality of our proposed strategy, trace amounts of three more dyes such as malachite green (MG), methylene blue (MB), and rhodamine 6G (R-6G), as well as other molecules such as thiram and bisphenol-S were also detected. This protocol not only provides a method for rapid on-site detection of trace-level molecules but can also be applied to other SERS-based analysis.
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