Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules
| Autor: | Yuan Tian, Zhisheng Peng, Haonan Wei, Mei Liu, Gongtang Wang, Cheng Yang, Lianfeng Sun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
SERS General Chemical Engineering 3D crossed CNTs detection of complex solutions Nanoparticle Substrate (chemistry) Nanotechnology Carbon nanotube Laser Article law.invention Rhodamine 6G Chemistry chemistry.chemical_compound symbols.namesake chemistry law Electric field symbols Au/AgNPs Molecule General Materials Science QD1-999 Raman scattering |
| Zdroj: | Nanomaterials Volume 11 Issue 8 Nanomaterials, Vol 11, Iss 2026, p 2026 (2021) |
| ISSN: | 2079-4991 |
| Popis: | 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 10−12 M (rhodamine 6G (R6G)), an enhancement factor of 1.60 × 109, 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. |
| Databáze: | OpenAIRE |
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