Electrokinetic trapping and surface enhanced Raman scattering detection of biomolecules using optofluidic device integrated with a microneedles array

Yu Luen Deng, Yi-Je Juang

Research output: Contribution to journalArticle

17 Citations (Scopus)


In this study, microneedles which possess sharp tips were utilized to trap and detect the biomolecules. Owing to the large curvature, the tips of the microneedles created a substantially high gradient of electric field under the non-uniform electric field which served as not only the trapping sites but also the substrate for surface enhanced Raman scattering (SERS). Separation of polystyrene microparticles with different sizes and two kinds of biomolecules (Staphylococcus aureus (S. aureus) and the red blood cells (RBCs)) were demonstrated. Moreover, in situ detection of S. aureus was performed immediately after separation was completed. The results showed that, after 15 s of sample collection, the Raman signals of S. aureus were detected and greatly enhanced through SERS effect.

Original languageEnglish
Article number014111
Issue number1
Publication statusPublished - 2013 Feb 4


All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Materials Science(all)
  • Genetics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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