A new morphology of copper 7,7,8,8-tetracyano-p-quinodimethane

Morphology control is a long-standing problem that needs to be solved for making the switching mechanism of copper 7,7,8,8-tetracyano-p-quinodimethane (CuTCNQ) understood all the time, but up till now how many morphologies CuTCNQ possesses and which morphology should be responsible for the on/off switching phenomenon are still unclear. A new morphology of CuTCNQ, namely the tubular structure, has been obtained and characterized in our experiment, whose formation mechanism has also been investigated. Through characterizing, we can conclude that the tubular structure belongs to the phase I, which can be further confirmed by the electrical measurements. From the I–V plots, the carrier mobility of the tubular structure is estimated to be ∼0.1 cm2 V−1 s−1, which suggests the potential application of CuTCNQ in devices.