Flexible Ag SERS substrate for non-destructive and rapid detection of toxic materials on irregular surface

Xueyan Bian, Jiangtao Xu, Jing Yang, Ka lam Chiu, Shouxiang Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

In this study, silver (Ag) is deposited onto polyester fabric through a magnetron sputtering system. The argon flow rate and sputtering time are both controlled to produce Ag nanoparticles of different sizes on the polyester substrate with different gap distances. The scanning electron microscope images, X-ray diffraction spectra, and Raman intensity are used to evaluate the produced substrates. With an average grain size of ~ 46 nm, Ag particles deposited at an argon flow rate of 200 sccm on polyester fabric (AP-200) provides the best SERS performance of 33,625.34 counts towards a 10−3 M MB solution. The results show that the AP-200 SERS substrate is highly sensitive, reproducible and stable, and it also demonstrates good reusability. Image of “hotspots” that forms between two Ag nanoparticles based on electric field distribution is simulated by the finite-difference time-domain (FDTD) method which is used to explain the phenomenon of signal enhancement. In addition, AP-200 is used to directly collect R6G from an irregular surface, and shows high sensitivity with a limit of detection of 1 ppm.

Original languageEnglish
Article number100995
JournalSurfaces and Interfaces
Volume23
DOIs
Publication statusPublished - Apr 2021

Keywords

  • Ag nanoparticles
  • Flexible
  • Non-destructive
  • Rapid detection
  • Surface-enhanced Raman Scattering (SERS)

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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