Abstract:Graphdiyne (GDY), an emerging type of carbon allotropes with unique sp−sp2 carbon atoms, is firstly explored for high selectivity direct electrochemical sensing of ultra‐trace level copper ions (Cu2+). It achieves a wide detection range of 0.25–380 μM and a trace level as low as 8 nM, among the best performance of reported carbon‐based sensors. It is found that GDY with unique C≡C possesses both chelating and reducing abilities to efficiently anchor and reduce Cu2+ to Cu+, eventually leading to ultrasensitive … Show more
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