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Tannin-furanic foams used as biomaterial substrates for SERS sensing in possible wastewater filter applications

  • G. Sabathi
  • , A. Reyer
  • , N. Cefarin
  • , T. Sepperer
  • , J. Eckardt
  • , J. Neubauer
  • , F. Jan Wendisch
  • , F. D'Amico
  • , L. Vaccari
  • , G. Tondi
  • , M. Musso
  • Department Chemistry and Physics of Materials, University of Salzburg
  • Elettra-Sincrotrone Trieste S.C.p.A. di interesse nazionale
  • Salzburg Center for Smart Materials
  • Nanoinstitut München, Faculty of Physics, Ludwig Maximilian University of Munich
  • Department of Land, Environment, Agriculture and Forestry, University of Padua

Research output: Contribution to journalArticlepeer-review

Abstract

Simple substrates for surface enhanced Raman spectroscopy (SERS), producible in a cost-efficient way, are of growing interest both for scientific and for environmental applications. In this study, we demonstrate the use of three types of bio-based tannin-furanic rigid foams as precursor materials for SERS substrates. Coated with a silver layer, these substrates allowed the detection of several well-known analytes in the mM regime by Raman spectroscopy. Specific optimization of the standard tannin-furanic foam morphology by tuning the chemical synthesis led to a smaller and more homogeneously distributed pore structure, supplying more active hot spot areas. Thus, we obtained a significant increase and a lower relative standard deviation (RSD) of the SERS signal recorded over the mapped SERS substrate area, for several analytes, in particular for Malachite Green dye. This work represents a feasibility study opening several potential applications of this biopolymers in fields such as the detection of water pollutants, virtually combining filtration and SERS capabilities driven by a controlled porosity.
Original languageEnglish
JournalMater. Res. Express
Volume8
Issue number11
DOIs
Publication statusPublished - 23 Nov 2021

Keywords

  • Biopolymers
  • Flavonoids
  • Morphology
  • Raman spectroscopy
  • Substrates
  • Tannins
  • Water filtration
  • Water pollution
  • Analytes
  • Bio-based
  • Cost-efficient
  • Environmental applications
  • Filter applications
  • Precursor materials
  • Rigid foams
  • Silver layer
  • Simple++
  • Surface enhanced Raman spectroscopy
  • Pore structure

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