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A phenomenological description of BslA assemblies across multiple length scales.

Morris RJ, Bromley KM, Stanley-Wall N, MacPhee CE - Philos Trans A Math Phys Eng Sci (2016)

Bottom Line: Here we describe several self-assembled structures formed by BslA, both at interfaces and in bulk solution, over a range of length scales spanning from nanometres to millimetres.First, we observe transiently stable and highly elongated air bubbles formed in agitated BslA samples.Second, we describe elongated tubules formed by BslA interfacial films when shear stresses are applied in both a Langmuir trough and a rheometer.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.

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Relaxation of BslA films as a function of equilibration time: 2 min (black squares); 5 min (red circles); 10 min (blue triangles). Films were produced in a pendant drop from a 0.03 mg ml−1 solution of BslA. Wrinkles were monitored and the average lifetimes of six wrinkles are reported (error bars are standard deviation).
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RSTA20150131F5: Relaxation of BslA films as a function of equilibration time: 2 min (black squares); 5 min (red circles); 10 min (blue triangles). Films were produced in a pendant drop from a 0.03 mg ml−1 solution of BslA. Wrinkles were monitored and the average lifetimes of six wrinkles are reported (error bars are standard deviation).

Mentions: To reinforce this point, we monitored the relaxation of a BslA film formed on a pendant drop after compression at an oil–water interface as a function of equilibration time. We observe that there is a clear dependence between the equilibration time and the robustness of the film (figure 5). Taken together, we propose that the dissipation of air bubbles arises from non-optimal packing of BslA units at the poles owing to higher curvature in these regions, in conjunction with the slow kinetics of formation of the cohesive, elastic surface layer.Figure 5.


A phenomenological description of BslA assemblies across multiple length scales.

Morris RJ, Bromley KM, Stanley-Wall N, MacPhee CE - Philos Trans A Math Phys Eng Sci (2016)

Relaxation of BslA films as a function of equilibration time: 2 min (black squares); 5 min (red circles); 10 min (blue triangles). Films were produced in a pendant drop from a 0.03 mg ml−1 solution of BslA. Wrinkles were monitored and the average lifetimes of six wrinkles are reported (error bars are standard deviation).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4920280&req=5

RSTA20150131F5: Relaxation of BslA films as a function of equilibration time: 2 min (black squares); 5 min (red circles); 10 min (blue triangles). Films were produced in a pendant drop from a 0.03 mg ml−1 solution of BslA. Wrinkles were monitored and the average lifetimes of six wrinkles are reported (error bars are standard deviation).
Mentions: To reinforce this point, we monitored the relaxation of a BslA film formed on a pendant drop after compression at an oil–water interface as a function of equilibration time. We observe that there is a clear dependence between the equilibration time and the robustness of the film (figure 5). Taken together, we propose that the dissipation of air bubbles arises from non-optimal packing of BslA units at the poles owing to higher curvature in these regions, in conjunction with the slow kinetics of formation of the cohesive, elastic surface layer.Figure 5.

Bottom Line: Here we describe several self-assembled structures formed by BslA, both at interfaces and in bulk solution, over a range of length scales spanning from nanometres to millimetres.First, we observe transiently stable and highly elongated air bubbles formed in agitated BslA samples.Second, we describe elongated tubules formed by BslA interfacial films when shear stresses are applied in both a Langmuir trough and a rheometer.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.

Show MeSH
Related in: MedlinePlus