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Electric preconcentration and detection of latex beads with interdigitated electrodes

2007; American Institute of Physics; Volume: 90; Issue: 17 Linguagem: Inglês

10.1063/1.2731311

1520-8842

Roberto de la Rica, César Fernández‐Sánchez, Antonio Baldi,

Microfluidic and Bio-sensing Technologies

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.