Electric preconcentration and detection of latex beads with interdigitated electrodes

Roberto De La Rica, Cesar Fernandez-Sanchez, Antonio Baldi

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Latex beads are adhered to the surface of a chip containing polycrystalline silicon interdigitated electrodes by positive dielectrophoresis. The presence of the microparticles induces a change in the distribution of the electric fields and currents that can be detected by measuring either the conductance or the capacitance at the electrode terminals. This combination of actuation and detection with a single device is proposed as a suitable system applicable to biosensing.
Original languageEnglish
Article number174104
Number of pages4
JournalApplied Physics Letters
Issue number17
Publication statusPublished - 2007


  • interdigitated electrodes
  • electric preconcentration
  • detection
  • latex beads

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