Deposition of PEDOT/SWCNT Composites by Inkjet Printing


Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), or PEDOT:PSS, a conductive polymer suspension, as well as carbon nanotubes (CNTs), were incorporated into a conductive ink suitable for use in a piezoelectric inkjet printer. Viscosity, surface tension, and particle size of the ink were controlled to achieve stable, high-resolution printing. Passage of the CNTs through the filtration and jetting steps involved in printing was evaluated using scanning transmission electron microscopy (STEM), UV-visible spectroscopy, and zeta-potential measurements of the filtered and printed inks. Only single-walled nanotubes (SWCNTs) passed through the jetting stage in significant amounts. Printed PEDOT/SWCNT sheet resistance was effectively minimized at ˜1 kO/on cellulose acetate, in ink containing 6 w/w% of an aqueous SWCNT solution (approximately 0.04 w/w% SWCNTs).

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Angelo, P.D., Farnood, R.R. Deposition of PEDOT/SWCNT Composites by Inkjet Printing. MRS Online Proceedings Library 1260, 702 (2010).

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