Joy Y. Cheng, Daniel P. Sanders, et al.
SPIE Advanced Lithography 2008
Brewster angle microscopy is used to directly visualize the influence of an applied extensional flow on the domain structure and molecular orientation of a docosanoic acid monolayer at the air-water interface. At a surface pressure of 12 mN/m and a subphase temperature of 15 °°C (L2 phase), extensional flow causes domain elongation parallel to the extension axis. A frequency domain analysis of the Brewster angle images indicates that the domains undergo an affine deformation in response to flow. AT 20 mN/m (L2′ phase), the flow modifies not only the domain structure of the monolayer but also the azimuthal orientation of the fatty acid molecules. This flow-alignment process is strain-rate dependent. Thus, flow can couple to the monolayer order over a variety of length scales.
Joy Y. Cheng, Daniel P. Sanders, et al.
SPIE Advanced Lithography 2008
G. Will, N. Masciocchi, et al.
Zeitschrift fur Kristallographie - New Crystal Structures
H.D. Dulman, R.H. Pantell, et al.
Physical Review B
J.R. Thompson, Yang Ren Sun, et al.
Physica A: Statistical Mechanics and its Applications