Fig. 4
From: Phase transitions as intermediate steps in the formation of molecularly engineered protein fibers
Dry spinning of 3-block architecture proteins into fibers at ambient temperature, pressure, and using water as the solvent. a Rapid formation of fibers by extending a 10–15 µL aliquot of LLC at 70–75% w/v. b SEM image of a single pulled fiber (scale bar 2 μm). High-magnification image from the surface of the fibers show a regular surface pattern with a periodicity of 20 nm (scale bar 200 nm). c Adherence of two freshly pulled fibers to each other. Junctions were strong enough to withstand stretching. d Electron micrographs showing the full fusion of two individual fibers placed in contact with each other. The fusing of fibers was dependent on water content, with dry fibers not fusing. The two original fibers are marked 1 and 2 (scale bar 20 μm)
