| 초록 |
Polydiacetylene (PDA) exhibits unique optical properties in response to diverse external stimuli, such as temperature, pH, molecular recognition, and methanical stress. PDA is prepared by polymerizing self-assembled diacetylene monomers through 365nm UV-radiation. Typically, blue-colored PDA turns the color to red in the presence of such stimuli that partially distort the π-conjugated polymer backbone. There have been numerous studies of PDA used as sensors at a bulk scale, whereas only a relatively small number of studies have been conducted on colorimetric sensor applications at an individual particle level. In this work, the effect of thermal stress generated by highly focused laser beam on the colorimetric response of PDA is quantitatively investigiated using optical laser tweezers. |
