A facile method to fabricate a novel 3D porous silicon/gold architecture for surface enhanced Raman scattering

Ting Huang, Li Cao, Xin Zhang, Xiaoyan Xiong, Jiejie Xu, Rongshi Xiao

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Si-based surface enhanced Raman scattering (SERS) sensing technology is a powerful tool for the detection of various chemical and biological species. Further improvement of the simplicity, stability, sensitivity, and low cost of Si-based SERS platforms is still in great demand for real applications. In this study, the facile fabrication of three-dimensional (3D) porous Si/Au SERS platform with attractive SERS performances was reported. The developed method relied on laser-induced dendrite-like microstructure on the surface of Al-Si cast alloy followed by dealloying Al from the laser treated surface, leaving a 3D dendrite-like porous Si substrate. By sputtering, the substrate was coated with Au film to form 3D porous Si/Au SERS platform. Such 3D porous Si/Au SERS platform had high SERS sensitivity that enabled ultralow concentration detection of R6G molecules down to 10−15 M with enhancement factor in the range of 1011 to 1012. The relative standard deviation of 6.2% was obtained from 15 random SERS spectrum, indicating superior reproducibility of the as-fabricated 3D porous Si/Au SERS platform.

Original languageEnglish
Pages (from-to)127-133
Number of pages7
JournalJournal of Alloys and Compounds
Volume790
DOIs
Publication statusPublished - 2019 Jun 25
Externally publishedYes

Keywords

  • Dealloying
  • Laser
  • Porous Si/Au
  • SERS

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'A facile method to fabricate a novel 3D porous silicon/gold architecture for surface enhanced Raman scattering'. Together they form a unique fingerprint.

Cite this