Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection
This paper discusses the fabrication of three-dimensional dendritic Ag nanostructures, showcasing pronounced Localized Surface Plasmon Resonance (LSPR) effects. These nanostructures, employed in surface-enhanced Raman scattering (SERS), function as sensors for lactic acid in artificial sweat. The de...
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MDPI AG
2024-09-01
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| Series: | Nanomaterials |
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| author | Chia-Ling Sung Tzung-Ta Kao Yu-Cheng Lin |
| author_facet | Chia-Ling Sung Tzung-Ta Kao Yu-Cheng Lin |
| author_sort | Chia-Ling Sung |
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| description | This paper discusses the fabrication of three-dimensional dendritic Ag nanostructures, showcasing pronounced Localized Surface Plasmon Resonance (LSPR) effects. These nanostructures, employed in surface-enhanced Raman scattering (SERS), function as sensors for lactic acid in artificial sweat. The dendritic structures of the silver nanoparticles (AgNPs) create an effective SERS substrate, with additional hotspots at branch junctures enhancing LSPR. We achieve differential LSPR effects by varying the distribution and spacing of branches and the overall morphology. Adjustments to electrodeposition parameters, such as current and plating solution protective agents on an anodized aluminum oxide (AAO) base, allow for precise control over LSPR intensities. By pre-depositing AgNPs, the electron transmission paths during electrodeposition are modified, which leads to optimized dendritic morphology and enhanced LSPR effects. Parameter optimization produces elongated rods with main and secondary branches, covered with uniformly sized, densely packed, non-overlapping spherical AgNPs. This configuration enhances the LSPR effect by generating additional hotspots beyond the branch tips. Fine-tuning the electrodeposition parameters improved the AgNPs’ morphology, achieving uniform particle distribution and optimal spacing. Compared to non-SERS substrates, our structure amplified the Raman signal for lactic acid detection by five orders of magnitude. This method can effectively tailor SERS substrates for specific analytes and laser-based detection. |
| format | Article |
| id | doaj-art-3631d2bc3ee74dae964dfa7b44a8a284 |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-3631d2bc3ee74dae964dfa7b44a8a2842025-08-20T02:16:55ZengMDPI AGNanomaterials2079-49912024-09-011419156210.3390/nano14191562Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive DetectionChia-Ling Sung0Tzung-Ta Kao1Yu-Cheng Lin2Department of Engineering Science, National Cheng Kung University, Tainan 70101, TaiwanInstitute of Photonics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 82445, TaiwanDepartment of Engineering Science, National Cheng Kung University, Tainan 70101, TaiwanThis paper discusses the fabrication of three-dimensional dendritic Ag nanostructures, showcasing pronounced Localized Surface Plasmon Resonance (LSPR) effects. These nanostructures, employed in surface-enhanced Raman scattering (SERS), function as sensors for lactic acid in artificial sweat. The dendritic structures of the silver nanoparticles (AgNPs) create an effective SERS substrate, with additional hotspots at branch junctures enhancing LSPR. We achieve differential LSPR effects by varying the distribution and spacing of branches and the overall morphology. Adjustments to electrodeposition parameters, such as current and plating solution protective agents on an anodized aluminum oxide (AAO) base, allow for precise control over LSPR intensities. By pre-depositing AgNPs, the electron transmission paths during electrodeposition are modified, which leads to optimized dendritic morphology and enhanced LSPR effects. Parameter optimization produces elongated rods with main and secondary branches, covered with uniformly sized, densely packed, non-overlapping spherical AgNPs. This configuration enhances the LSPR effect by generating additional hotspots beyond the branch tips. Fine-tuning the electrodeposition parameters improved the AgNPs’ morphology, achieving uniform particle distribution and optimal spacing. Compared to non-SERS substrates, our structure amplified the Raman signal for lactic acid detection by five orders of magnitude. This method can effectively tailor SERS substrates for specific analytes and laser-based detection.https://www.mdpi.com/2079-4991/14/19/1562Ag nanodendriteslactic acidlocalized surface plasmon resonance (LSPR)surface-enhanced Raman scattering (SERS)SERS substrates |
| spellingShingle | Chia-Ling Sung Tzung-Ta Kao Yu-Cheng Lin Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection Nanomaterials Ag nanodendrites lactic acid localized surface plasmon resonance (LSPR) surface-enhanced Raman scattering (SERS) SERS substrates |
| title | Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection |
| title_full | Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection |
| title_fullStr | Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection |
| title_full_unstemmed | Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection |
| title_short | Fabrication of Three-Dimensional Dendritic Ag Nanostructures: A SERS Substrate for Non-Invasive Detection |
| title_sort | fabrication of three dimensional dendritic ag nanostructures a sers substrate for non invasive detection |
| topic | Ag nanodendrites lactic acid localized surface plasmon resonance (LSPR) surface-enhanced Raman scattering (SERS) SERS substrates |
| url | https://www.mdpi.com/2079-4991/14/19/1562 |
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