Authors: C.S. Ah, A. Kim, H.Y. Yu, C.-G. Ahn, J.-H. Yang, I.B. Baek, C.W. Park, M.S. Jun and S.J. Lee
Affilation: Electronics and Telecommunications Research Institute (ETRI), Korea
Pages: 493 - 495
Keywords: Si FET, nanosensor, top-down, PSA, electrical detection, protein
A nanosensor of n-type Si field-effect transistor (FET) via “top-down method” was employed to monitor PSA with great selectivity and high sensitivity up to 10 pg/mL. When a biomaterial, negatively charged PSA, is introduced through a fluidic channel, the conductivity of FET is lowered than that in pure buffer solution from the n-type nature of nanochannel as a bionanosensor. The Si FET bionanosensor allows a real-time monitoring without any labeling, which indicates this electrical property originated from the specific binding between antibody and antigen.