SERS-from-scratch: An electric field-guided nanoparticle assembly method for cleanroom-free and low-cost preparation of surface-enhanced Raman scattering substrates

Hannah Dies, Reza Nosrati, Joshua Raveendran, Carlos Escobedo, Aristides Docoslis

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)

Abstract

Ultrasensitive detection of analytes is important in forensic science, environmental monitoring and medical diagnostics. Surface-enhanced Raman scattering (SERS) is an analytical detection method with single-molecule sensitivity, but nanofabrication of SERS substrates poses a barrier to its application. Here, we report on a facile and rapid approach to prepare ultrasensitive SERS substrates in situ by using electrokinetics to assemble Ag nanoparticles on a scored conductive surface. We demonstrate the unique characteristic of our method to produce highly SERS-active surfaces from a wide range of materials, including commercially available glass slides pre-coated with indium tin oxide (ITO). We show that the “SERS from scratch” substrates can detect trace quantities of explosives, drugs and pesticides, with sensitivities superior to some commercially available products.

Original languageEnglish
Pages (from-to)695-702
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume553
DOIs
Publication statusPublished - 20 Sep 2018
Externally publishedYes

Keywords

  • Colloidal assembly
  • Electrokinetics
  • Nanoparticles
  • Sensors
  • Surface-enhanced Raman scattering

Cite this