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Rapid fabrication of self-assembled interfacial film decorated filter paper as an excellent surface-enhanced Raman scattering substrate

  • Wu Li Ji Hasi*
  • , Shuang Lin
  • , Xiang Lin
  • , Xiu Tao Lou
  • , Fang Yang
  • , Dian Yang Lin
  • , Zhi Wei Lu
  • *Corresponding author for this work
  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

An excellent paper-based SERS substrate was easily fabricated by utilizing interfacial films formed in the mixture of Ag colloid and CH2Cl2. This interfacial film coating method significantly improves the fabrication efficiency of SERS substrates. The substrate has a high coverage of silver nanoparticles (Ag NPs) and can be tailored to arbitrary shapes. The SERS substrate exhibits high sensitivity (EF ∼ 4 × 107) and gives uniform SERS signals with a relative standard deviation (RSD) of 8.08% (spot-to-spot) and 8.65% (batch-to-batch) using 4-mercaptobenzoic acid (4-MBA) as a Raman probe. In addition, this SERS substrate with excellent stability can be stored for more than 30 days. The limit of detection was found to be 10-8 M for 4-MBA. In general, this SERS substrate is qualified for rapid and simple trace detection of various analytes.

Original languageEnglish
Pages (from-to)9547-9553
Number of pages7
JournalAnalytical Methods
Volume6
Issue number24
DOIs
StatePublished - 21 Dec 2014

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