Hydraulically pressed silver nanowire-cotton fibers as an active platform for filtering and surface-enhanced Raman scattering detection of bacteria from fluid

Bright Ankudze, Bismark Asare, Steffi Goffart, Arto Koistinen, Tarmo Nuutinen, Antti Matikainen, Sampson Saj Andoh, Matthieu Roussey, Tuula T. Pakkanen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Silver and gold nanoparticles-decorated cotton fiber substrates constitute an important group of the simple, inexpensive and versatile platforms for a SERS-based detection of biomolecules. However, the fibrous cotton embedded with metal nanoparticles is yet to be explored as a filter-like substrate for isolation and detection of pathogens from fluid. In this study, we present a straightforward approach based on hydraulic pressing to make a silver nanowire-decorated cotton fibers substrate a realistic platform for effective filtering and detection of bacteria from urine. Silver nanowires were anchored on cotton fibers using an aminopropyltrimethoxysilane as a linker. The obtained silver nanowire-cotton fiber material was compressed with a hydraulic press to substantially reduce the free spaces between the individual fibers. As a proof-of-concept, the prepared substrate was employed to effectively filter Escherichia coli bacteria from phosphate-buffered saline solution and urine. The silver nanowire-cotton SERS substrate thus serves as a low-cost and active platform for an effective detection of bacteria from fluids.

Original languageEnglish
Pages (from-to)663-668
Number of pages6
JournalApplied Surface Science
Volume479
DOIs
Publication statusPublished - 15 Jun 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Bacteria
  • Cotton
  • Escherichia coli
  • Silver nanowire
  • Surface-enhanced Raman scattering

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