Streptavidin as CNTs and DNA Linker for the Specific Electronic and Optical Detection of DNA Hybridization

Streptavidin was used as an interlinker between single-wall carbon nanotubes (SWNTs) and oligonucleotides for the electronic and optical detection of DNA hybridization. The aim of using streptavidin as a linker was to prevent nonspecific adsorption of biomolecules onto carbon nanotubes (CNTs) and also to prevent the aggregation of DNA strands or other contaminants to the source and drain electrodes that can modify the Schottky barrier. The …