Surface-enhanced Raman scattering (SERS) spectroscopy on localized silver nanoparticle-decorated porous silicon substrate

被引：18

作者：

Tsao, Chia-Wen ^{[1
]}

Zheng, You-Shan ^{[1
]}

Sun, Ya-Sen ^{[2
]}

Cheng, Yu-Che ^{[3
,4
,5
]}

机构：

[1] Natl Cent Univ, Dept Mech Engn, Taoyuan 32001, Taiwan

[2] Natl Cent Univ, Dept Chem & Mat Engn, Taoyuan 32001, Taiwan

[3] Cathay Gen Hosp, Dept Med Res, Prote Lab, Taipei 10630, Taiwan

[4] Fu Jen Catholic Univ, Sch Med, New Taipei 242062, Taiwan

[5] Natl Cent Univ, Dept Biomed Sci & Engn, Taoyuan 32001, Taiwan

来源：

ANALYST | 2021年 / 146卷 / 24期

关键词：

HOT-SPOTS; FABRICATION; ARRAY;

D O I：

10.1039/d1an01708j

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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.

引用

页码：7645 / 7652

页数：8

共 41 条

[1] Reusable Surface-Enhanced Raman Spectroscopy Substrates Made of Silicon Nanowire Array Coated with Silver Nanoparticles Fabricated by Metal-Assisted Chemical Etching and Photonic Reduction [J].