Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing
The effects of Au cores in Ag shells in enhancing surface-enhanced Raman scattering (SERS) were evaluated with samples of various Au/Ag ratios. High-density Ag shell/Au core dendritic nanoforests (Au@Ag-DNFs) on silicon (Au@Ag-DNFs/Si) were synthesized using the fluoride-assisted Galvanic replacemen...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/7/1736 |
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| author | Hung Ji Huang Ming-Hua Shiao Yang-Wei Lin Bei-Ju Lin James Su Yung-Sheng Lin Han-Wei Chang |
| author_facet | Hung Ji Huang Ming-Hua Shiao Yang-Wei Lin Bei-Ju Lin James Su Yung-Sheng Lin Han-Wei Chang |
| author_sort | Hung Ji Huang |
| collection | DOAJ |
| description | The effects of Au cores in Ag shells in enhancing surface-enhanced Raman scattering (SERS) were evaluated with samples of various Au/Ag ratios. High-density Ag shell/Au core dendritic nanoforests (Au@Ag-DNFs) on silicon (Au@Ag-DNFs/Si) were synthesized using the fluoride-assisted Galvanic replacement reaction method. The synthesized Au@Ag-DNFs/Si samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, reflection spectroscopy, X-ray diffraction, and Raman spectroscopy. The ultraviolet-visible extinction spectrum exhibited increased extinction induced by the addition of Ag when creating the metal DNFs layer. The pure Ag DNFs exhibited high optical extinction of visible light, but low SERS response compared with Au@Ag DNFs. The Au core (with high refractive index real part) in Au@Ag DNFs maintained a long-leaf structure that focused the illumination light, resulting in the apparent SERS enhancement of the Ag coverage. |
| first_indexed | 2024-03-10T09:54:13Z |
| format | Article |
| id | doaj.art-de9d426a20c7458cb393b39e83a2616c |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T09:54:13Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-de9d426a20c7458cb393b39e83a2616c2023-11-22T02:32:26ZengMDPI AGNanomaterials2079-49912021-06-01117173610.3390/nano11071736Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering SensingHung Ji Huang0Ming-Hua Shiao1Yang-Wei Lin2Bei-Ju Lin3James Su4Yung-Sheng Lin5Han-Wei Chang6Taiwan Instrument Research Institute, National Applied Research Laboratories, Hsinchu 300092, TaiwanTaiwan Instrument Research Institute, National Applied Research Laboratories, Hsinchu 300092, TaiwanDepartment of Chemistry, National Changhua University of Education, Changhua 500207, TaiwanDepartment of Chemical Engineering, National United University, Miaoli 360001, TaiwanTaiwan Instrument Research Institute, National Applied Research Laboratories, Hsinchu 300092, TaiwanDepartment of Chemical Engineering, National United University, Miaoli 360001, TaiwanDepartment of Chemical Engineering, National United University, Miaoli 360001, TaiwanThe effects of Au cores in Ag shells in enhancing surface-enhanced Raman scattering (SERS) were evaluated with samples of various Au/Ag ratios. High-density Ag shell/Au core dendritic nanoforests (Au@Ag-DNFs) on silicon (Au@Ag-DNFs/Si) were synthesized using the fluoride-assisted Galvanic replacement reaction method. The synthesized Au@Ag-DNFs/Si samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, reflection spectroscopy, X-ray diffraction, and Raman spectroscopy. The ultraviolet-visible extinction spectrum exhibited increased extinction induced by the addition of Ag when creating the metal DNFs layer. The pure Ag DNFs exhibited high optical extinction of visible light, but low SERS response compared with Au@Ag DNFs. The Au core (with high refractive index real part) in Au@Ag DNFs maintained a long-leaf structure that focused the illumination light, resulting in the apparent SERS enhancement of the Ag coverage.https://www.mdpi.com/2079-4991/11/7/1736Au@Ag dendritic nanoforestsfluoride-assisted Galvanic replacement reactionsurface-enhanced Raman scatteringsurface plasmons |
| spellingShingle | Hung Ji Huang Ming-Hua Shiao Yang-Wei Lin Bei-Ju Lin James Su Yung-Sheng Lin Han-Wei Chang Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing Nanomaterials Au@Ag dendritic nanoforests fluoride-assisted Galvanic replacement reaction surface-enhanced Raman scattering surface plasmons |
| title | Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing |
| title_full | Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing |
| title_fullStr | Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing |
| title_full_unstemmed | Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing |
| title_short | Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing |
| title_sort | au ag dendritic nanoforests for surface enhanced raman scattering sensing |
| topic | Au@Ag dendritic nanoforests fluoride-assisted Galvanic replacement reaction surface-enhanced Raman scattering surface plasmons |
| url | https://www.mdpi.com/2079-4991/11/7/1736 |
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