Nanoribbon charge-based biosensor using gateless UTBB BESOI pMOSFET

Nanoribbons built on gateless (GL) Ultra-Thin Body and Buried Oxide (UTBB) Back Enhanced SOI (BESOI) pMOSFET were analyzed as a charge-based (CB) biosensor for positive and negative charges into the biomaterial for the first time. Experimental GL BESOI pMOSFET was used as the basic structure for the CB biosensor and the influence of the charges were studied by numerical simulations. In general, when the CB biosensor was biased at weak inversion, the sensitivity is higher than when it was biased at strong inversion. For negative charges in the biomaterial, the conduction at front interface is favored. On the other hand, the conduction at back interface is higher if the biomaterial has positive charges. The nanoribbon GL UTBB BESOI pMOSFET showed to be a promising structure for an integrated charged based biosensor.