| 초록 |
We developed light-responsive block copolymer (BCP) particles, whose shape can be reversibly controlled. The main idea for forming light-dependent, reversibly shape changeable BCP particles is to design the surfactant containing light-active groups, which can light-dependently modulate interfacial activity in reversible manner. We successfully designed and synthesized reversibly light-responsive surfactant, SP-DTAB, which amphiphilicity can be tuned by wavelength controlled light irradiation. With irradiating 365nm UV light, sphere particles with onion-like inner morphology are formed. On the other hand, ellipsoidal particles with axially stacked lamellar domain structures are formed under irradiating visible light. In addition, particle shape transformation between sphere and ellipsoid is achieved by a chloroform vapor annealing with UV/visible light irradiation. Moreover, this shape-changeable property can be maintained under several times, in reversible manner. |
