| 초록 |
We demonstrate a systematic approach to produce colored films based on chitosan self-assembly and their application for detecting gaseous aldehydes. Chitosan was deposited to form the colored films on solid substrates via controlled evaporation of the meniscus using a facile dipping-pulling method. When exposed to aldehyde gases, the color bands exhibited various color changes caused by structural changes which occur upon specific binding of aldehydes to amine functional groups. In addition, correlation between structural change and color change of the films was confirmed using microstructural analyses including SEM, AFM and XPS. We believe that the chitosan-based colorimetric sensor has a potential as an inexpensive, user-friendly and environmentally friendly sensor for environmental monitoring |
