(45g) Visualizing a Macromolecular Phase Transition by Macroscopic Reaction-Diffusion Patterns

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.