Polydiacetylenes (PDA) have been widely investigated as smart
sensing materials because of their unique optical properties [1–
3]. PDA sensor systems can be easily fabricated by forming the
vesicle system from the sonication of the amphiphilic compound
containing diacetylene moiety and following the photopolymerization.
In this photopolymerization the initiator is not necessary
and UV irradiation is enough to initiate the polymerization. The
aligned monomeric diacetylene lipids undergo a photopolymerization
process by UV irradiation via a 1,4-polymerization
mechanism to form p-conjugated polymer chains that give the
material a colored appearance. PDA exhibits a distinctive
chromatic transition upon stimulation by temperature increase,
mechanical stress, or chemical materials. Sensing technologies
based on colorimetric response are very attractive because they
can be noted by the naked eye and hence do not require expensive
devices or equipment. Various sensing systems for special
chemical materials, such as mercury(II) [4], melamine [5], warfare
gas [6], toxin [7], nucleic acid [8], adulterated gasoline [9],
potassium [10], and antibiotics [11] were developed by researchers
using the properties of PDAs.