Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability
Vertically aligned ZnO: Ga nanotowers can be directly synthesized on a glass substrate with a ZnO seed film via the chemical bath method. A novel heterostructure of ZnO: Ga@ITO@Ag nanotowers was subsequently deposited in the ITO layer and Ag nanoparticles via the facile two-step ion-sputtering proce...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/1/163 |
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| author | Tung-Hao Chang Yun-Ting Liu Yu-Cheng Chang An-Ya Lo |
| author_facet | Tung-Hao Chang Yun-Ting Liu Yu-Cheng Chang An-Ya Lo |
| author_sort | Tung-Hao Chang |
| collection | DOAJ |
| description | Vertically aligned ZnO: Ga nanotowers can be directly synthesized on a glass substrate with a ZnO seed film via the chemical bath method. A novel heterostructure of ZnO: Ga@ITO@Ag nanotowers was subsequently deposited in the ITO layer and Ag nanoparticles via the facile two-step ion-sputtering processes on the ZnO: Ga nanotowers. The appropriate ion-sputtering times of the ITO layer and Ag nanoparticles can benefit the fabrication of ZnO: Ga@ITO@Ag nanotowers with higher surface-enhanced Raman scattering (SERS) enhancement in detecting rhodamine 6G (R6G) molecules. Compared with ZnO: Ga@Ag nanotowers, ZnO: Ga@ITO@Ag nanotowers exhibited a high SERS enhancement factor of 2.25 × 10<sup>8</sup> and a lower detection limit (10<sup>−14</sup> M) for detecting R6G molecules. In addition, the ITO layer used as an intermediate layer between ZnO: Ga nanotowers and Ag nanoparticles can improve SERS enhancement, sensitivity, uniformity, reusability, detection limit, and stability for detecting amoxicillin molecules. This phenomenon shall be ascribed to the ITO layer exhibiting a synergistic Raman enhancement effect through interfacial charge transfer for enhancing SERS activity. As a result, ZnO: Ga@ITO@Ag nanotowers can construct a three-dimensional SERS substrate for potential applications in environmentally friendly and cost-effective chemical or drug detection. |
| first_indexed | 2024-03-09T09:44:14Z |
| format | Article |
| id | doaj.art-f47f3aa8a02b4954b4bb1d9c827f3c3a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T09:44:14Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f47f3aa8a02b4954b4bb1d9c827f3c3a2023-12-02T00:44:53ZengMDPI AGNanomaterials2079-49912022-12-0113116310.3390/nano13010163Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable DetectabilityTung-Hao Chang0Yun-Ting Liu1Yu-Cheng Chang2An-Ya Lo3Department of Radiation Oncology, Changhua Christian Hospital, Changhua 50006, TaiwanDepartment of Materials Science and Engineering, Feng Chia University, Taichung 407102, TaiwanDepartment of Materials Science and Engineering, Feng Chia University, Taichung 407102, TaiwanDepartment of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 411030, TaiwanVertically aligned ZnO: Ga nanotowers can be directly synthesized on a glass substrate with a ZnO seed film via the chemical bath method. A novel heterostructure of ZnO: Ga@ITO@Ag nanotowers was subsequently deposited in the ITO layer and Ag nanoparticles via the facile two-step ion-sputtering processes on the ZnO: Ga nanotowers. The appropriate ion-sputtering times of the ITO layer and Ag nanoparticles can benefit the fabrication of ZnO: Ga@ITO@Ag nanotowers with higher surface-enhanced Raman scattering (SERS) enhancement in detecting rhodamine 6G (R6G) molecules. Compared with ZnO: Ga@Ag nanotowers, ZnO: Ga@ITO@Ag nanotowers exhibited a high SERS enhancement factor of 2.25 × 10<sup>8</sup> and a lower detection limit (10<sup>−14</sup> M) for detecting R6G molecules. In addition, the ITO layer used as an intermediate layer between ZnO: Ga nanotowers and Ag nanoparticles can improve SERS enhancement, sensitivity, uniformity, reusability, detection limit, and stability for detecting amoxicillin molecules. This phenomenon shall be ascribed to the ITO layer exhibiting a synergistic Raman enhancement effect through interfacial charge transfer for enhancing SERS activity. As a result, ZnO: Ga@ITO@Ag nanotowers can construct a three-dimensional SERS substrate for potential applications in environmentally friendly and cost-effective chemical or drug detection.https://www.mdpi.com/2079-4991/13/1/163ZnO: Ga nanotowerschemical bathITO layerAg nanoparticlesion sputteringsurface-enhanced Raman scattering |
| spellingShingle | Tung-Hao Chang Yun-Ting Liu Yu-Cheng Chang An-Ya Lo Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability Nanomaterials ZnO: Ga nanotowers chemical bath ITO layer Ag nanoparticles ion sputtering surface-enhanced Raman scattering |
| title | Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability |
| title_full | Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability |
| title_fullStr | Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability |
| title_full_unstemmed | Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability |
| title_short | Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability |
| title_sort | fabrication of three dimensional zno ga ito ag sers active substrate for sensitive and repeatable detectability |
| topic | ZnO: Ga nanotowers chemical bath ITO layer Ag nanoparticles ion sputtering surface-enhanced Raman scattering |
| url | https://www.mdpi.com/2079-4991/13/1/163 |
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