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A simple, economical and scalable technique is demonstrated to make conductive yarn. Single walled carbon nanotubes (SWCNTs) are non-covalently functionalized with dye (Acid Red 91) and dispersed in water; while cotton yarn is treated with poly (ethylene imine). When the resulting yarn is immersed in the SWCNT dispersion, SWCNTs self-assemble onto the yarn due to electrostatic forces between the functionalized...
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