*5.2.2 Adsorption*

A biorecognition component is immobilized on the outer surface of an passive solid material using the adsorption approach. This is done by attractive forces but weak like the ionic bonding, van der Waals force, electrostatic force, or hydrogen bonding. It is nondestructive and does not call for the creation of a matrix or the modification of biological components. However, it has weak connections and is susceptible to deviations in ionic strength, pH, and temperature. It has poor operational and storage stability [2].
