1. The author claim "This result suggests that the FN proteins are acting as effective crosslinks, prohibiting the redistribution of polymer chains." A control, using only fluorescent agent, might be required to make this statement.
2. It is very interesting the polymer film could be tear-out, it would be also important to test the interface interaction between the polymer film and glass substrate.
3. Tuneable mobility of the polymer film is one objective of this work, however, no data was shown to support this statement.