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- W2007474005 abstract "Despite their recognized potential for low cost, flexible and high frequency electronics and photovoltaic, semi-conducting carbon nanotubes (sc-CNTs) did not lead to industrial development yet because they are synthesized as a mixture with metallic carbon nanotubes (m-CNTs). Sorting has been widely studied but cost remains high. Here, the proposed CNT chemical treatment uses diazoether with unprecedented selectivity, avoiding m-CNT and sc-CNT separation. Indeed like conventional diazonium coupling, partly selective for m-CNTs, diazoether coupling induces extinction of nanotube conductivity. The diazoether proved 50 times more selective than diazonium as shown by luminescence, Raman spectroscopy and electrical conductivity. Treated CNT solutions containing inactive m-CNTs and highly preserved sc-CNTs were used in transistors with highly increased ON/OFF ratio. Furthermore, the diazoether/CNT reaction was found to follow an unexpected coupling mechanism: a stoichiometric, radical-free reaction instead of a radical chain reaction for diazonium. This drastic change in mechanism, together with a complete description of the reaction kinetics and thermodynamics, brought easy tuning and fine control on the reaction. As a versatile treatment diazoether provides a cheap sc-CNT material for large scale use in printed electronics." @default.
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- W2007474005 date "2014-01-01" @default.
- W2007474005 modified "2023-10-18" @default.
- W2007474005 title "A highly selective non-radical diazo coupling provides low cost semi-conducting carbon nanotubes" @default.
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- W2007474005 doi "https://doi.org/10.1016/j.carbon.2013.08.064" @default.
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