Transition of ionic liquid [bmim][PF6] from liquid to high-melting-point crystal when confined in multiwalled carbon nanotubes

In this communication, we report our finding on the transition of ionic liquid [bmim][PF6] from the liquid state to high-melting-point crystal when confined in multiwalled carbon nanotubes. This novel crystallization behavior is explained by the nanosized effect of carbon nanotubes on the structure of ionic liquid.