Layer-by-layer assembly of intact polydiacetylene vesicles with retained chromic properties

Behaviour of polydiacetylene vesicles under different conditions of temperature, pH and chemical components of milk

“…Lee, Chae et al (2007), found colour transition for PCDA vesicles dispersed in a solution consisting of poly-vinyl alcohol and sodium borate at temperatures from 40 to 55°C, with CR of 30% at 55°C. In studies carried out by Potisatityuenyong, Tumcharern, Dubas, and Sukwattanasinitt (2006), PCDA vesicles in solution presented complete colorimetric transition at the range of 68°C and CR ranging from 20% to 70%. These values were linear for temperatures between 25 and 70°C.…”

Stable polydiacetylene/ZnO nanocomposites with two-steps reversible and irreversible thermochromism: The influence of strong surface anchoring

“…The sol-gel method has been applied for introducing poly(PCDA) vesicles into silica networks [48][49][50]. The procedure known as polyelectrolyte multilayers has also been used to encapsulate poly(PCDA) vesicles in different kinds of polymer matrices [51][52][53]. Recently, a method involving simply blending with other polymers such as poly(vinylpyridine) [54], poly(vinylpyrolidone) [42] and polyvinylalcohol(PVA) [55] is introduced.…”

Roles of head group architecture and side chain length on colorimetric response of polydiacetylene vesicles to temperature, ethanol and pH

“…Polydiacetylene (PDA) is one of conjugated polymer that exhibits rather interesting chromic properties. It has been observed that PDA assemblies exhibit color-transition when subjected to various external stimuli including solvents (solvatochromism) [6][7][8][9], temperature (thermochromism) [10][11][12][13][14][15], pH [16][17][18][19], ions [20,21] and ligand-receptor interaction (affinochromism) [22][23][24][25][26][27][28][29][30]. This unique property renders PDAs to be utilized as an active material in various applications such as chemosensors [4,31,33], biosensors [23,[26][27][28][29][30][31][32], ion sensors [21,22,24,34], temperature sensors [14,35] and molecular switches [36].…”

“…PDA-based sensors can be prepared in different forms of organized structures such as Langmuir-Blodgett/Langmuir-Schaefer films [3,10,13], polyelectrolyte multilayered films [6,9,37] and assemblies dispersed in liquids [18][19][20][21][22][23][24]38,39]. Diacetylene (DA) monomers with polar head and long alkyl tail tend to spontaneously arrange into vesicular structure in aqueous medium.…”