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Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection
Three-dimensional surface-enhanced Raman scattering (SERS) substrates usually provide more hot spots in the excitation light beam and higher sensitivity when compared with the two-dimensional counterpart. Here a simple approach is presented for the fabrication of arrays of Ag-nanoparticles decorated...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9574249/ https://www.ncbi.nlm.nih.gov/pubmed/36262347 http://dx.doi.org/10.3389/fchem.2022.992236 |
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author | Zhai, Haichao Zhu, Chuhong Wang, Xiujuan Yuan, Yupeng Tang, Haibin |
author_facet | Zhai, Haichao Zhu, Chuhong Wang, Xiujuan Yuan, Yupeng Tang, Haibin |
author_sort | Zhai, Haichao |
collection | PubMed |
description | Three-dimensional surface-enhanced Raman scattering (SERS) substrates usually provide more hot spots in the excitation light beam and higher sensitivity when compared with the two-dimensional counterpart. Here a simple approach is presented for the fabrication of arrays of Ag-nanoparticles decorated TiO(2) nanotubes. Arrays of ZnO nanorods were fabricated in advance by a hydrothermal method. Then TiO(2) nanotube arrays were achieved by immersing the arrays of ZnO nanorods in an aqueous solution of (NH(4))(2)TiF(6) for 1.5 h. Vertically aligned TiO(2) nanotube arrays were modified with dense Ag nanoparticles by Ag mirror reaction. High density of Ag nanoparticles decorated on the fabricated TiO(2) nanotubes provide plenty of hotspots for Raman enhancement. In addition, the fabricated array of Ag nanoparticles modified TiO(2) nanotubes can serve as a reusable SERS substrate because of the photocatalytic activity of the TiO(2) nanotubes. The SERS substrate adsorbed with analyte molecules can realize self-cleaning in deionized water after UV irradiation for 2.5 h. The sensitivity of the fabricated SERS substrate was investigated by the detection of organic dye molecules. The detectable concentration limits of rhodamine 6G (R6G), malachite green (MG) and methylene blue (MB) were found to be 10(−12) M, 10(−9) M and 10(−8) M, respectively. The enhancement factor (EF) of the three-dimensional SERS substrate was estimated to be as high as ∼1.4×10(8). Therefore, the prepared Ag nanoparticles modified TiO(2) nanotube arrays have promising potentials to be applied to rapid and trace SERS detection of organic chemicals. |
format | Online Article Text |
id | pubmed-9574249 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-95742492022-10-18 Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection Zhai, Haichao Zhu, Chuhong Wang, Xiujuan Yuan, Yupeng Tang, Haibin Front Chem Chemistry Three-dimensional surface-enhanced Raman scattering (SERS) substrates usually provide more hot spots in the excitation light beam and higher sensitivity when compared with the two-dimensional counterpart. Here a simple approach is presented for the fabrication of arrays of Ag-nanoparticles decorated TiO(2) nanotubes. Arrays of ZnO nanorods were fabricated in advance by a hydrothermal method. Then TiO(2) nanotube arrays were achieved by immersing the arrays of ZnO nanorods in an aqueous solution of (NH(4))(2)TiF(6) for 1.5 h. Vertically aligned TiO(2) nanotube arrays were modified with dense Ag nanoparticles by Ag mirror reaction. High density of Ag nanoparticles decorated on the fabricated TiO(2) nanotubes provide plenty of hotspots for Raman enhancement. In addition, the fabricated array of Ag nanoparticles modified TiO(2) nanotubes can serve as a reusable SERS substrate because of the photocatalytic activity of the TiO(2) nanotubes. The SERS substrate adsorbed with analyte molecules can realize self-cleaning in deionized water after UV irradiation for 2.5 h. The sensitivity of the fabricated SERS substrate was investigated by the detection of organic dye molecules. The detectable concentration limits of rhodamine 6G (R6G), malachite green (MG) and methylene blue (MB) were found to be 10(−12) M, 10(−9) M and 10(−8) M, respectively. The enhancement factor (EF) of the three-dimensional SERS substrate was estimated to be as high as ∼1.4×10(8). Therefore, the prepared Ag nanoparticles modified TiO(2) nanotube arrays have promising potentials to be applied to rapid and trace SERS detection of organic chemicals. Frontiers Media S.A. 2022-10-03 /pmc/articles/PMC9574249/ /pubmed/36262347 http://dx.doi.org/10.3389/fchem.2022.992236 Text en Copyright © 2022 Zhai, Zhu, Wang, Yuan and Tang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Zhai, Haichao Zhu, Chuhong Wang, Xiujuan Yuan, Yupeng Tang, Haibin Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection |
title | Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection |
title_full | Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection |
title_fullStr | Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection |
title_full_unstemmed | Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection |
title_short | Arrays of Ag-nanoparticles decorated TiO(2) nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection |
title_sort | arrays of ag-nanoparticles decorated tio(2) nanotubes as reusable three-dimensional surface-enhanced raman scattering substrates for molecule detection |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9574249/ https://www.ncbi.nlm.nih.gov/pubmed/36262347 http://dx.doi.org/10.3389/fchem.2022.992236 |
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