549Chemical Nanosensors
can be fabricated using several nanomaterials, including CNTs and NWs. In
order to provide selectivity toward a unique analyte, a specic recognition
group (also called a receptor, ligand, or probe) is anchored to the surface of
the semiconductor channel. This receptor is typically chosen to recognize
its target molecule (also called analyte) with a high degree of specicity and
afnity.
9.10.1 CNT-Based ISFET for Nano pH Sensor
CNTs come in two different forms: MWCNTs and SWCNTs, which range
in diameter from 1 to 10 and 10 to 50 nm, respectively. About 70%–80% of
SWCNTs display semiconducting properties, whereas 70%–80% of MWCNTs
show metallic properties.
How is a CNT handled for its accurate and exact positioning between ...