Highly reusable nanoporous silver sheet for sensitive SERS detection of pesticides
| Autor: | Xin Dai, Zhien Wang, Qing Chen, Huanyu Chi, Jinqing Huang, Wei Liu, Hongni Zhu, Congcheng Wang, Vince St. Dollente Mesias |
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| Rok vydání: | 2020 |
| Předmět: |
Analyte
Silver Materials science Nanotechnology 02 engineering and technology Spectrum Analysis Raman 010402 general chemistry 01 natural sciences Biochemistry Analytical Chemistry Nanopores chemistry.chemical_compound symbols.namesake Hydrocarbons Chlorinated Electrochemistry Rhodamine B Environmental Chemistry Pesticides Spectroscopy Nanoporous Organochlorine pesticide Pesticide 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | The Analyst. 145:5158-5165 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/d0an00999g |
| Popis: | Surface-enhanced Raman spectroscopy (SERS) enables pesticide detection at the point-of-need, but its practical application is limited by expensive and disposable SERS substrates. Here, we report a reusable nanoporous silver (NPAg) sheet for the SERS detection of organochlorine pesticides, aiming to maximize the cost-efficiency of substrate regeneration. The NPAg sheet is prepared by a reduction-induced decomposition method without chemical induced random aggregations. This SERS substrate is sensitive to various analytes regardless of their affinity to a metal surface such as rhodamine B, dichlorodiphenyl-trichloroethane (DDT), and lindane due to its large surface area and the coral rock-like morphology. The SERS signal of lindane, a typical organochlorine pesticide, is identified and quantified with a minimum detectable concentration of 3 × 10−7 M (87 ppb), which is below the maximum residue limits in various foods set by the regulators across the world. More importantly, after a few minutes of ultrasonic cleaning in water, the NPAg sheet can be reused at least 20 times with a reproducible SERS activity. Furthermore, the NPAg sheet remains stable in terms of its sensitivity and reusability after several months of bare strorage. Therefore, the NPAg sheet as a SERS substrate holds great promise for mass production and convenient applications in low-cost pesticide analysis. |
| Databáze: | OpenAIRE |
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