Fatty Acid Chemistry at the Oil−Water Interface: Self-Propelled Oil Droplets
- 6 July 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 129 (30), 9386-9391
- https://doi.org/10.1021/ja0706955
Abstract
Fatty acids have been investigated as boundary structures to construct artificial cells due to their dynamic properties and phase transitions. Here we have explored the possibility that fatty acid systems also demonstrate movement. An oil phase was loaded with a fatty acid anhydride precursor and introduced to an aqueous fatty acid micelle solution. The oil droplets showed autonomous, sustained movement through the aqueous media. Internal convection created a positive feedback loop, and the movement of the oil droplet was sustained as convection drove fresh precursor to the surface to become hydrolyzed. As the system progressed, more surfactant was produced and some of the oil droplets transformed into supramolecular aggregates resembling multilamellar vesicles. The oil droplets also moved directionally within chemical gradients and exhibited a type of chemotaxis.Keywords
This publication has 28 references indexed in Scilit:
- Listeria-like Motion of Oil DropletsChemistry Letters, 2006
- Periodic Marangoni Instability in Surfactant (CTAB) Liquid/Liquid Mass TransferThe Journal of Physical Chemistry B, 2005
- Fast Directed Motion of “Fakir” DropletsLangmuir, 2004
- Correlation between Electric Potential and Interfacial Tension Oscillations in a Water−Oil−Water SystemThe Journal of Physical Chemistry B, 2004
- Experimental Models of Primitive Cellular Compartments: Encapsulation, Growth, and DivisionScience, 2003
- Chemical influences on adsorption-mediated self-propelled drop movementPhysical Review E, 2002
- Auto-oscillation of surface tensionPhysical Review E, 1999
- Self-polarization and directional motility of cytoplasmCurrent Biology, 1999
- Spontaneous oscillation of pH and electrical potential in an oil-water systemJournal of the American Chemical Society, 1983
- The distribution of alkali metal, ammonium, and tetraethylammonium dipicrylaminates between water and nitrobenzene phasesJournal of Inorganic and Nuclear Chemistry, 1968