Cooperative photoinduced two-dimensional condensation in Langmuir films observed using nanosecond pump-probe Brewster angle microscopy |
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Authors: | Hobley Jonathan Gorelik Sergey Oori Tomoya Kajimoto Shinji Fukumura Hiroshi Matsui Jun Miyashita Tokuji |
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Institution: | Institute of Materials Research and Engineering, Agency for Science Technology (A*STAR), 3 Research Link, Singapore 117602, Singapore. hobleyj@imre.a-star.edu.sg |
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Abstract: | Two-dimensional condensation was initiated in a self-assembled mixed monolayer of spiropyran and octadecanol by a nanosecond laser pulse. The dynamics of the process were monitored using nanosecond pump-probe Brewster angle microscopy. Domain growth followed a power law with a growth exponent of 0.47 at a velocity approaching 20?ms(-1). This represents a limit for the rate of longitudinal signaling of pressure waves through a self-assembled amphiphilic layer at an interface and adds to our understanding of signal transmission rates in biomimetic membranes where morphological change in one region can be signaled to a more remote region. |
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