Characterization of Carbon Nanotube Surfaces by Infrared Vibration Spectroscopy

Abstract

We have characterized the adsorption properties of protein molecules on carbon nanotube surfaces by infrared vibration spectroscopy. We observed the vibration modes of protein molecules from the avidin-adsorbed CNTs. Density of the adsorbed avidin molecules was higher on acid-treated CNTs than on non-treated ones. These results indicate that CNTs are suitable materials for an adsorbent of bio-molecules, and are promising for high-sensitivity bio-sensors and removers of toxic proteins.