(45g) Visualizing a Macromolecular Phase Transition by Macroscopic Reaction-Diffusion Patterns Conference: AIChE Annual MeetingYear: 2005Proceeding: 2005 AIChE Annual MeetingGroup: Engineering Sciences and FundamentalsSession: Transport and Reaction in Heterogeneous and Porous Materials Time: Monday, October 31, 2005 - 9:48am-10:06am Authors: Fialkowski, M., Northwestern University Bitner, A., Dept of Chemical and Biological Engineering, Northwestern University Smoukov, S. K., North Carolina State University Campbell, C. J., Northwestern University Grzybowski, B. A., Northwestern University we have described a model chemical system, which by virtue of the imposed microgeometry autonomously detects a macromolecular phase transition occurring in a thin film, and reports it in a visual form of color patterns. We suggest that micronetwork RD systems similar to the one described here might be useful in rapid assessment of absorptivities of other materials ? likely, using different indicator/ink pairs and possibly with different solvents12. Finally, we believe that this work will stimulate new theoretical research on RD processes coupled by mass transfer and occurring in complex microgeometries.