Patterning of Polydiacetylene Liposomes and Fibers using MIMIC

Abstract

Polydiacetylene (PDA) and its derivative comprise an important class of conjugated polymers, with the unique characteristics of self-assembly. They can be used as sensor materials emitting red-fluorescence by external stimuli, such as heat, solvent, mechanical stress, and molecular recognition. In this research, micron-sized patterns of polydiacetylene liposomes and fibers are fabricated on Ti substrate using micromolding in capillaries (MIMIC). SEM and AFM revealed the morphology of the patterned PDA liposomes and self-assembled PDA-IPA fibers. Fluorescence microscopy demonstrated the capability of the PDA liposomes and fibers for sensor materials. This investigation has led to the development of a new strategy for the fabrication of conjugated polymer patterns on solid substrates. When combined with the novel optical properties of polydiacetylene, this methodology should enhance the versatility of conjugated polymers in sensor and optical applications.