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This thesis presents an in-depth study on the effect of colloidal
particle shape and formation mechanism on self-organization and the
final crystal symmetries that can be achieved. It demonstrates how
state-of-the-art X-ray diffraction techniques can be used to
produce detailed characterizations of colloidal crystal structures
prepared using different self-assembly techniques, and how smart
systems can be used to investigate defect formation and diffusion
in-situ. One of the most remarkable phenomena exhibited by
concentrated suspensions of colloidal particles is the spontaneous
self-organization into structures with long-range spatial and/or
orientational orders. The study also reveals the subtle structural
variations that arise by changing the particle shape from spherical
to that of a rounded cube. In particular, the roundness of the cube
corners, when combined with the self-organization pathway,
convective assembly or sedimentation, was shown to influence the
final crystal symmetries.
This thesis presents an in-depth study on the effect of colloidal
particle shape and formation mechanism on self-organization and the
final crystal symmetries that can be achieved. It demonstrates how
state-of-the-art X-ray diffraction techniques can be used to
produce detailed characterizations of colloidal crystal structures
prepared using different self-assembly techniques, and how smart
systems can be used to investigate defect formation and diffusion
in-situ. One of the most remarkable phenomena exhibited by
concentrated suspensions of colloidal particles is the spontaneous
self-organization into structures with long-range spatial and/or
orientational orders. The study also reveals the subtle structural
variations that arise by changing the particle shape from spherical
to that of a rounded cube. In particular, the roundness of the cube
corners, when combined with the self-organization pathway,
convective assembly or sedimentation, was shown to influence the
final crystal symmetries.
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