Electric-Field-Assisted Protein Transport, Capture, and Interferometric Sensing in Carbonized Porous Silicon Films

A carbonized porous silicon Fabry-Perot film acts as an electrically addressable, label-free optical biosensor that allows simultaneous separation, capture, and detection of charged proteins within a volume of 5 nL. Electroadsorption of protein within the 40 nm diameter pores is induced by an applied bias and the process is monitored in real-time by optical interferometry.