Carbon Nanotube Biosensors with Aptamers as Molecular Recognition Elements

In this chapter, we discuss in detail the fabrication of carbon nanotube biosensors that use a single-walled carbon nanotube field-effect transistor (SWNT-FET) as a transducer, and aptamers as molecular recognition elements. We use a patterned growth technique to grow SWNTs on Si/SiO₂ substrates, and standard microfabrication procedures are then employed to fabricate sensing devices.