Carbon nanotube and metal oxide hybrid materials for gas sensing

Carbon nanotube and metal oxide hybrid materials for gas sensing 

KERDCHAROEN, Mahidol University,Thailand and C. WONGCHOOSUK, Kasetsart University, ITiailand 

Key words carbon nanotubes/metal oxides gas sensor, MOX/CNT composites, p-n heterojunctions, hybrid sensor, sensing part for e-nose. 

CNT-doped metal oxides. In this case, CNTs are embedded within the MOX matrix. This chapter will focus on this type of CNT and MOX hybrid material. The MOX/CNT thin films can be prepared using various techniques, such as spin-coating, drop-coating, dip-coating, and electron beam evaporation, details of which will be given in the following sections. 

CNTs are generally produced using three main techniques arc discharge, laser ablation, and chemical vapor deposition. Each technique can be modified to suit the specific research purpose. 

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