A method of making carbon-based nano-rods from switchable ionic liquids (SWIL) that incorporates the SWIL is disclosed. Resulting nano-rods provide adsorption and spontaneous desorption of water at selected relative humidity values that find use in selected applications and devices.
STATEMENT REGARDING RIGHTS TO INVENTION MADE UNDER FEDERALLY-SPONSORED RESEARCH AND DEVELOPMENT
 This invention was made with Government support under Contract DE-AC05-76RL01830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.