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Fluid mixing in gro...
Fluid mixing in growing microscale vesicles conjugated by surfactant nanotubes
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- Davidson, M. (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Dommersnes, P. (författare)
- Physico-Chimie Curie
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- Markström, Martin, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Joanny, J. F. (författare)
- Physico-Chimie Curie
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- Karlsson, Mattias, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Orwar, Owe, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2005-01-05
- 2005
- Engelska.
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Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 1520-5126 .- 0002-7863. ; 127:4, s. 1251-1257
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This work addresses novel means for controlled mixing and reaction initiation in biomimetic confined compartments having volume elements in the range of 10-12 to 10-15 L. The method is based on mixing fluids using a two-site injection scheme into growing surfactant vesicles. A solid-state injection needle is inserted into a micrometer-sized vesicle (radius 5-25 μm), and by pulling on the needle, we create a nanoscale surfactant channel connecting injection needle and the vesicle. Injection of a solvent A from the needle into the nanotube results in the formation of a growing daughter vesicle at the tip of the needle in which mixing takes place. The growth of the daughter vesicle requires a flow of surfactants in the nanotube that generates a flow of solvent B inside the nanotube which is counterdirectional to the pressure-injected solvent. The volume ratio ψ between solvent A and B inside the mixing vesicle was analyzed and found to depend only on geometrical quantities. The majority of fluid injected to the growing daughter vesicle comes from the pressure-based injection, and for a micrometer-sized vesicle it dominates. For the formation of one daughter vesicle (conjugated with a 100-nm radius tube) expanded from 1 to 200 μm in radius, the mixing ratios cover almost 3 orders of magnitude. We show that the system can be expanded to linear strings of nanotube-conjugated vesicles that display exponential dilution. Mixing ratios spanning 6 orders of magnitude were obtained in strings of three nanotube-conjugated micrometer-sized daughter vesicles.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
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