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A rapid immunosensing method for measuring two tumor markers, alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA), based on particle manipulation by negative dielectrophoresis (n-DEP) was developed. When microparticles modified with different antibodies were subjected to n-DEP manipulation by the application of an AC voltage, they accumulated in particular positions in poly(dimethylsiloxane) (PDMS) fluidic channels modified with corresponding antibodies within 1 min. The presence of afatcat:keq4e7rt4jf4pkniymraxpdeku