During the last decade, physical gels prepared by small molecular gelators have attracted more and more attention. As an important branch of physical gel, stimuli-responsive gels, which inculde hydrogels and organogels, have been extensively investigated and have potential applications in smart biomaterials and drug-delivery systems. As one of the special gels, the heat-set organogels which are formed at high temperature in organic solvents have received increasing attention for their great potentia...