This paper reports on the development of an inkjet deposition apparatus for the realization of low cost sensing devices. The printing system is based on a HP720 printer modified with custom mechanics and electronics. The developed system is able to print aqueous inks of multiwalled carbon nanotubes (MWCNT) composites with poly(methacrylic acid) (PMA) or poly(diallyldimethylammonium chloride) (PDDAC). The thickness and electrical resistance of the printed fi lms can be modulated simply by varying the printing cycles. Examples of the reliable ink-jet printing of MWCNTs/PMA and MWCNTs/PDDAC film on different kinds of substrates are reported.
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