| 초록 |
A colorimetric sensor array (CSA) is a chemically inert substrate printed with an array of chemo-responsive indicators that differentially change color when exposed to different analytes. Up to now, substrates have been used to print CSAs, including silica gel plates, glass slides, cellulose-based membranes, and polymeric microporous membranes. However, those substrates suffer from large inconsistent spots and spot overlapping with each other, slow response, and chemical reactivity with alkaline respectively for use in CSA fabrication. Considering the importance of solid support for CSAs, we have developed low cost and highly chemical resistant perfluoroalkoxy (PFA) polymer nanoparticle-packed porous substrates. These PFA polymer nanoparticles coated substrates demonstrated superior chemical resistance against ink formulation solvents, acids and bases. In addition they possessed relatively uniform nanoporous structures that substantially improved the printability of a CSA. Finally, CSAs printed on these substrates evaluated for the detection of four different toxic industrial chemicals (e.g., ammonia, hydrogen sulfide, nitrogen dioxide, and sulfur dioxide) below their permissible exposure limits. |
