{"title":"多功能八面体UiO- 66-NH2/Fe3O4/Ag SERS底物快速灵敏检测孔雀石绿","authors":"Xiaobo Ma, Fang Mi, Pengfei Geng, Guotong Chen, Shan Zhang, Zhiyuan Sun, Jian Sun, Peng Chen, Ming Guan","doi":"10.1007/s00604-025-07165-2","DOIUrl":null,"url":null,"abstract":"<div><p>Multifunctional nanocomposites have attracted extensive attention in the design of new SERS substrates. In this work, a metal-organic framework (MOF) modified with Ag nanoparticles (Ag NPs) and cysteine functionalized Fe<sub>3</sub>O<sub>4</sub> (UiO-66-NH<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub>/Ag) was prepared as a SERS substrate (UFAs). The substrate combines the enrichment ability of UiO-66-NH<sub>2</sub>, the magnetic separation ability of Fe<sub>3</sub>O<sub>4</sub>, and the localized surface plasmon resonance (LSPR) effect of Ag NPs to achieve efficient detection of the target analyte. The results of adsorption kinetics showed that the adsorption process of malachite green (MG) was mainly dominated by chemical adsorption. In addition, we further explored the detection mechanism of UFAs for MG. UFAs enriched cation analytes such as MG through π-π stacking and electrostatic interaction and performed SERS detection. The UFA SERS substrate exhibits good detection sensitivity for MG, with a limit of detection (LOD) of 1.35 × 10<sup>−10</sup> M (at 1619 cm<sup>−1</sup>), and the SERS substrate has good uniformity and stability. The SERS substrate was applied to the detection of MG in aquaculture water. The recovery of MG in the sample was 91.2–105%, and the relative standard deviation (RSD) was 3.76–6.06%. This high-performance UFA SERS substrate also has great potential for the detection of food and other environmental pollutants in practical applications.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"192 5","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Rapid and sensitive detection of malachite green by multifunctional octahedron UiO- 66-NH2/Fe3O4/Ag SERS substrate\",\"authors\":\"Xiaobo Ma, Fang Mi, Pengfei Geng, Guotong Chen, Shan Zhang, Zhiyuan Sun, Jian Sun, Peng Chen, Ming Guan\",\"doi\":\"10.1007/s00604-025-07165-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Multifunctional nanocomposites have attracted extensive attention in the design of new SERS substrates. In this work, a metal-organic framework (MOF) modified with Ag nanoparticles (Ag NPs) and cysteine functionalized Fe<sub>3</sub>O<sub>4</sub> (UiO-66-NH<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub>/Ag) was prepared as a SERS substrate (UFAs). The substrate combines the enrichment ability of UiO-66-NH<sub>2</sub>, the magnetic separation ability of Fe<sub>3</sub>O<sub>4</sub>, and the localized surface plasmon resonance (LSPR) effect of Ag NPs to achieve efficient detection of the target analyte. The results of adsorption kinetics showed that the adsorption process of malachite green (MG) was mainly dominated by chemical adsorption. In addition, we further explored the detection mechanism of UFAs for MG. UFAs enriched cation analytes such as MG through π-π stacking and electrostatic interaction and performed SERS detection. The UFA SERS substrate exhibits good detection sensitivity for MG, with a limit of detection (LOD) of 1.35 × 10<sup>−10</sup> M (at 1619 cm<sup>−1</sup>), and the SERS substrate has good uniformity and stability. The SERS substrate was applied to the detection of MG in aquaculture water. The recovery of MG in the sample was 91.2–105%, and the relative standard deviation (RSD) was 3.76–6.06%. This high-performance UFA SERS substrate also has great potential for the detection of food and other environmental pollutants in practical applications.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":705,\"journal\":{\"name\":\"Microchimica Acta\",\"volume\":\"192 5\",\"pages\":\"\"},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2025-04-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microchimica Acta\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00604-025-07165-2\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microchimica Acta","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s00604-025-07165-2","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
Rapid and sensitive detection of malachite green by multifunctional octahedron UiO- 66-NH2/Fe3O4/Ag SERS substrate
Multifunctional nanocomposites have attracted extensive attention in the design of new SERS substrates. In this work, a metal-organic framework (MOF) modified with Ag nanoparticles (Ag NPs) and cysteine functionalized Fe3O4 (UiO-66-NH2/Fe3O4/Ag) was prepared as a SERS substrate (UFAs). The substrate combines the enrichment ability of UiO-66-NH2, the magnetic separation ability of Fe3O4, and the localized surface plasmon resonance (LSPR) effect of Ag NPs to achieve efficient detection of the target analyte. The results of adsorption kinetics showed that the adsorption process of malachite green (MG) was mainly dominated by chemical adsorption. In addition, we further explored the detection mechanism of UFAs for MG. UFAs enriched cation analytes such as MG through π-π stacking and electrostatic interaction and performed SERS detection. The UFA SERS substrate exhibits good detection sensitivity for MG, with a limit of detection (LOD) of 1.35 × 10−10 M (at 1619 cm−1), and the SERS substrate has good uniformity and stability. The SERS substrate was applied to the detection of MG in aquaculture water. The recovery of MG in the sample was 91.2–105%, and the relative standard deviation (RSD) was 3.76–6.06%. This high-performance UFA SERS substrate also has great potential for the detection of food and other environmental pollutants in practical applications.
期刊介绍：
As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.
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