Surface-enhanced Raman scattering (SERS) spectroscopy on localized silver nanoparticle-decorated porous silicon substrate
| Autor: | Yu-Che Cheng, You-Shan Zheng, Ya-Sen Sun, Chia Wen Tsao |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Fabrication technology industry and agriculture Nanotechnology Hot spot (veterinary medicine) Substrate (electronics) Porous silicon Biochemistry Silver nanoparticle Analytical Chemistry symbols.namesake Etching (microfabrication) Electrochemistry symbols Environmental Chemistry Spectroscopy Raman scattering |
| Zdroj: | The Analyst. 146:7645-7652 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/d1an01708j |
| Popis: | Surface-enhanced Raman scattering (SERS) spectroscopy is a rapid and non-destructive optical detection method that has been applied in various applications. Recently, three-dimensional (3D) substrate-based silicon nanostructures have been widely used as SERS substrates due to their high detection sensitivity, repeatability, and reusability. This paper uses a simple and low-cost electroless etching deposition process to generate silver nanoparticle-decorated porous silicon (Ag-PS) substrates. We propose a contact deposition process to generate localized Ag-PS (LocAg-PS) for SERS analysis. Due to the hydrophilic LocAg-PS pad on the hydrophobic PS background, the sample droplets self-aligned to the predefined LocAg-PS pads and condensed into a higher local concentration for high sensitivity SERS detection without extensive search for the hot spot. The effects of critical fabrication parameters and SERS analysis on the LocAg-PS surface were evaluated. |
| Databáze: | OpenAIRE |
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