Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules
Research on engineering “hotspots” in the field of surface-enhanced Raman scattering (SERS) is at the forefront of contributing to the best sensing indicators. Currently, there is still an urgent need to design a high-strength and large-scale electric field distribution method in order to obtain an...
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MDPI AG
2021-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/8/2026 |
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| author | Haonan Wei Zhisheng Peng Cheng Yang Yuan Tian Lianfeng Sun Gongtang Wang Mei Liu |
| author_facet | Haonan Wei Zhisheng Peng Cheng Yang Yuan Tian Lianfeng Sun Gongtang Wang Mei Liu |
| author_sort | Haonan Wei |
| collection | DOAJ |
| description | Research on engineering “hotspots” in the field of surface-enhanced Raman scattering (SERS) is at the forefront of contributing to the best sensing indicators. Currently, there is still an urgent need to design a high-strength and large-scale electric field distribution method in order to obtain an ideal SERS sensor. Here, we designed a three-dimensional (3D) Au/Ag nanoparticle (NP)/crossed carbon nanotube film SERS substrate. The proposed structure formed by the simple preparation process can perfectly coordinate the interaction between the SERS substrates, lasers, and molecules. The denser “hotspots” can be induced and then distributed in holes enclosed by Au/AgNPs and the gaps between them. This process was verified by numerical simulations. The experimental results show that the proposed SERS substrate possesses an excellent sensitivity of 10<sup>−12</sup> M (rhodamine 6G (R6G)), an enhancement factor of 1.60 × 10<sup>9</sup>, and a good signal reproducibility (the relative standard deviation is ~6.03%). We further use a Au/AgNP/crossed CNT substrate to detect complex solutions composed of toxic molecules, which shows that our proposed SERS substrate has a wide range of application potentials, especially in food safety. |
| first_indexed | 2024-03-10T08:32:01Z |
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| id | doaj.art-374c9262587d4bafa5e4a3766d06d8d4 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T08:32:01Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-374c9262587d4bafa5e4a3766d06d8d42023-11-22T08:59:22ZengMDPI AGNanomaterials2079-49912021-08-01118202610.3390/nano11082026Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic MoleculesHaonan Wei0Zhisheng Peng1Cheng Yang2Yuan Tian3Lianfeng Sun4Gongtang Wang5Mei Liu6School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaCAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, ChinaSchool of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaSchool of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaCAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, ChinaSchool of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaSchool of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaResearch on engineering “hotspots” in the field of surface-enhanced Raman scattering (SERS) is at the forefront of contributing to the best sensing indicators. Currently, there is still an urgent need to design a high-strength and large-scale electric field distribution method in order to obtain an ideal SERS sensor. Here, we designed a three-dimensional (3D) Au/Ag nanoparticle (NP)/crossed carbon nanotube film SERS substrate. The proposed structure formed by the simple preparation process can perfectly coordinate the interaction between the SERS substrates, lasers, and molecules. The denser “hotspots” can be induced and then distributed in holes enclosed by Au/AgNPs and the gaps between them. This process was verified by numerical simulations. The experimental results show that the proposed SERS substrate possesses an excellent sensitivity of 10<sup>−12</sup> M (rhodamine 6G (R6G)), an enhancement factor of 1.60 × 10<sup>9</sup>, and a good signal reproducibility (the relative standard deviation is ~6.03%). We further use a Au/AgNP/crossed CNT substrate to detect complex solutions composed of toxic molecules, which shows that our proposed SERS substrate has a wide range of application potentials, especially in food safety.https://www.mdpi.com/2079-4991/11/8/2026SERSAu/AgNPs3D crossed CNTsdetection of complex solutions |
| spellingShingle | Haonan Wei Zhisheng Peng Cheng Yang Yuan Tian Lianfeng Sun Gongtang Wang Mei Liu Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules Nanomaterials SERS Au/AgNPs 3D crossed CNTs detection of complex solutions |
| title | Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules |
| title_full | Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules |
| title_fullStr | Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules |
| title_full_unstemmed | Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules |
| title_short | Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules |
| title_sort | three dimensional au ag nanoparticle crossed carbon nanotube sers substrate for the detection of mixed toxic molecules |
| topic | SERS Au/AgNPs 3D crossed CNTs detection of complex solutions |
| url | https://www.mdpi.com/2079-4991/11/8/2026 |
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