Flow-controlled phase boundaries in Langmuir monolayers.
Flow-controlled fingering of the liquid expanded/liquid condensed phase boundary in a 2-d insoluble monolayer is investigated using a laser-induced thermocapillary pump. Spatially periodic perturbations of the initially smooth monolayer phase boundary between a liquid expanded and liquid condensed phase are shown to lead to the development of steady profile of one-dimensional fingers. The steady-state modulation wave vector and the transient growth rate increase with the flow velocity that drives the instability following power scaling laws consistent with a theory of Bruinsma, Rondelez, and Levine (Bruinsma, R.; Rondelez, F.; Levine, A. Eur. Phys. J. E. 2001, 6, 191) on flow rather than diffusion dominated instabilities in monolayers.
Muruganathan
R M
RM
Fischer
Th M
TM
D000388:Air; D007700:Kinetics; D008081:Liposomes / Q000737:chemistry*; D008856:Microscopy, Fluorescence; D012995:Solubility; D012997:Solvents / Q000737:chemistry*; D013228:Stearates / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry
C512255:2,3-dimethyl octadecanoate; D008081:Liposomes; D012997:Solvents; D013228:Stearates; D013501:Surface-Active Agents; D014867:Water