Grazing incidence synchrotron x-ray diffraction of polymerizing Langmuir monolayers
Octadecyltrimethoxysilane (OTMS) was spread on the water surface of a Langmuir trough. Utilizing the high-intensity synchrotron X-ray radiation at the Advanced Photon Source at Argonne National Laboratory, the kinetics of film growth of OTMS as a function of the subphase pH was studied. In situ grazing incidence X-ray diffraction experiments at the air/water interface revealed that OTMS self-assembles into small domains and that the number of these ordered domains increases as OTMS undergoes hydrolysis/condensation reactions. The hexagonal packing of alkyl chains found in the OTMS monolayer is consistent with the ordering found in bulk OTMS by powder X-ray diffraction.
Publication Source (Journal or Book title)
Carino, S., Underhill, R., Tostmann, H., Skolnik, A., Logan, J., Davidson, M., Culp, J., & Duran, R. (2003). Grazing incidence synchrotron x-ray diffraction of polymerizing Langmuir monolayers. Langmuir, 19 (25), 10514-10522. https://doi.org/10.1021/la034444v