| 초록 |
Herein, we report mesoporous polymer films with hydrophobic rod-like poly(p-phenyleneethynylene) (PPE) polymers for TNT sensors. With the non-solvent vapor-induced phase separation (NVIPS), relative humidity is controlled during spin-coating to prepare well-defined porous films. By increasing the surface area of fluorescent polymer films, we expect to enhance the sensing performance, which have been applicable only to non-porous thin films, owing to the limited diffusion length of TNT vapor. To introduce surface morphologies, the polarity of polymer’s sidechains was modified to vary the interactions with the non-solvent. Interfacial energies were finely tuned, allowing us to control the porous structure. As expected, TNT vapor effectively diffuses inside the porous film, showing high sensor sensitivity, when compared with the non-porous film. Therefore, we find out that the control on porous structure as well as on film thickness is a promising strategy for the sensitive chemosensors. |
