Synthesis of coordination polymer thin films with conductance-response to mechanical stimulation

Synthesis of coordination polymer thin films which are tough and highly oriented is of vital importance for exploring electronic functions under mechanical stimulation. We synthesized prismatic thin films of copper hexaferrocyanide coordination frameworks by coordination replication on oxidized copper sheets. The films were composed of vertically standing prisms which were similar to mollusk shells. These thin films had good mechanical strength and vertical charge transfer pathways, showing an external pressure dependent electric current response recorded in a wide pressure range (0.5-12 MPa).