A simple, economical and scalable technique is demonstrated to make conductive yarn. Single wailed carbon nanotubes （SWCNTs） are non-covalently functionalized with dye （Acid Red 91） and dispersed in water; while c...A simple, economical and scalable technique is demonstrated to make conductive yarn. Single wailed 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 functionalJzed nanotubes and yarn. Scanning electron microscopy, transmission electron microscopy and Raman spectroscopy indicate the assembly of carbon nanotubes. The SWCNT functionalized yarn exhibits reasonable electrical conduction behaviour and are then used to make chemiresistors. The electrical resistance of the chemiresistors used as sensors increases on exposure to ammonia gas, which can be explained in terms of electron transfer between gas molecules and SWCNTs.展开更多
基金the National Natural Science Foundation of China (Grant no. 51105051)for the financial support
文摘A simple, economical and scalable technique is demonstrated to make conductive yarn. Single wailed 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 functionalJzed nanotubes and yarn. Scanning electron microscopy, transmission electron microscopy and Raman spectroscopy indicate the assembly of carbon nanotubes. The SWCNT functionalized yarn exhibits reasonable electrical conduction behaviour and are then used to make chemiresistors. The electrical resistance of the chemiresistors used as sensors increases on exposure to ammonia gas, which can be explained in terms of electron transfer between gas molecules and SWCNTs.
