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Author:

Tao, Guanwei (Tao, Guanwei.) | Li, Jiajun (Li, Jiajun.) | Mu, Yunyun (Mu, Yunyun.) | Zhang, Xinping (Zhang, Xinping.) (Scholars:张新平)

Indexed by:

EI Scopus SCIE

Abstract:

We report a three-dimensional (3D) SERS substrate consisting of a silver nanoparticle (AgNP) coating on the skeleton-fiber surfaces of a polytetrafluoroethylene (PTFE) membrane. Simple thermal evaporation was employed to deposit Ag onto the PTFE membrane to produce grape-shaped AgNPs. The 3D-distributed AgNPs exhibit not only strong localized surface plasmon resonance (LSPR) but also strong hydrophobic performance. High-density hotspots via silver nano-grape structures and nanogaps, the large 3D interaction volume, and the large total surface area, in combination with the hydrophobic enrichment of the specimen, facilitate high-sensitivity sensing performance of such a SERS substrate for the direct detection of low-concentration molecules in water. An enhancement factor of up to 1.97 x 1010 was achieved in the direct detection of R6G molecules in water with a concentration of 10-13 mol/L. The lowest detection limit of 100 ppt was reached in the detection of melamine in water. Such a SERS sensor may have potential applications in food-safety control, environmental water pollution monitoring, and biomedical analysis.

Keyword:

three-dimensional ultra-sensitive detection hydrophobic SERS sensors PTFE membranes aqueous solutions

Author Community:

  • [ 1 ] [Tao, Guanwei]Beijing Univ Technol, Inst Informat Photon Technol, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Jiajun]Beijing Univ Technol, Inst Informat Photon Technol, Beijing 100124, Peoples R China
  • [ 3 ] [Mu, Yunyun]Beijing Univ Technol, Inst Informat Photon Technol, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Xinping]Beijing Univ Technol, Inst Informat Photon Technol, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 张新平

    [Zhang, Xinping]Beijing Univ Technol, Inst Informat Photon Technol, Beijing 100124, Peoples R China

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Source :

BIOSENSORS-BASEL

Year: 2024

Issue: 2

Volume: 14

5 . 4 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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