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Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing
| Content Provider | MDPI |
|---|---|
| Author | Huang, Hung Shiao, Ming-Hua Lin, Yang-Wei Lin, Bei-Ju Su, James Lin, Yung-Sheng Chang, Han-Wei |
| Copyright Year | 2021 |
| 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. |
| Starting Page | 1736 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11071736 |
| Journal | Nanomaterials |
| Issue Number | 7 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-06-30 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Analytical Chemistry Au@ag Dendritic Nanoforests Fluoride-assisted Galvanic Replacement Reaction Surface-enhanced Raman Scattering Surface Plasmons |
| Content Type | Text |
| Resource Type | Article |
