| 초록 |
Photochromic materials undergo a reversible structural change that inter-converts two distinct isomeric forms upon irradiation at specific wavelengths. Spiropyran derivatives have garnered great attention as a result of a number of interesting features that include distinct chromic transition, and fluorogenic nature of one isomeric form in certain environments. Polydimethylsiloxane, a low cost flexible and transparent polymer. We formulated the hypothesis that embedment of photochromic spiropyran molecules in PDMS would enable fabrication of a unique, transparent, flexible, microfluidic compatible and reversible sensor system. The HCl vapor was found to penetrate the PDMS film. Thus, exposure of the PDMS film containing the ME form of the spiropyran to HCl vapor leads to a purple-to-yellow color transformation with an excellent sensitivity(＜2.3ppm) to the HCl gas. |
