Organic FET-based DNA hybridization sensor with sub-picomolar sensitivity

LAI, STEFANO;BARBARO, MASSIMO;BONFIGLIO, ANNALISA

2015-01-01

---

Abstract

In this paper, a novel approach for DNA hybridization detection by means of organic field-effect transistors-based biosensors (bioFETs) is proposed. The reported device, namely Organic Charge-Modulated FET (OCMFET), is conceived for overcoming the main limitations of bioFETs, related to design, materials and measurement conditions. In particular, record performances in terms of sensitivity and selectivity will be reported. Moreover, as innovative features among bioFETs, the detection ability of the OCMFET at relatively high ionic strengths will be carefully discussed, unravelling the interactions between the bioreceptors characteristics at the nano-scale and the device polarization.