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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Adv Healthc Mater. 2012 Jul 31;2(1):126–133. doi: 10.1002/adhm.201200118

Figure 1.

Figure 1

Transmission electron micrographs of PA nanostructures at various co-assembly compositions. High aspect-ratio nanofibers are predominant in aqueous solutions of (a) 100% K3 PA and (b) 2% KLAK PA. Solutions of (c) 20% KLAK PA display a significant number of small spherical aggregates, while solutions of (d) 50% KLAK PA and (e) 100% KLAK PA contain predominantly spherical aggregates with few short nanofibers. (f) Heating a 50% KLAK PA solution at 80 °C for 8 h leads to nanofiber morphology. Total PA concentration is 5 mm for all samples. Labels indicate the percentage of KLAK PA, with K3 PA comprising the remaining balance.