Nanographite assembled films for sensitive NO2 detection

Carbon based nanostructures are interesting building blocks to realize films for a lot of applications that include bio- and chemical-sensing. In this work we present a one-step electrochemical method to produce water-based stable nanographite colloid used to realize lined-up micro-patterned films. The high surface-to-volume ratio makes these structures suitable for adsorbing gases. Morphological, compositional and structural characterization have been performed in order to determine the features of the films. Simple resistive nanographite devices were fabricated and tested for NO2 sensitivity. Moreover, the present approach represents a general and facile method of good potential for scale-up that could be extended to other materials.