Colloidal Crystals of Spheres and Cubes in Real and by Janne-Mieke Meijer

By Janne-Mieke Meijer

This thesis offers an in-depth examine at the impact of colloidal particle form and formation mechanism on self-organization and the ultimate crystal symmetries that may be accomplished. It demonstrates how cutting-edge X-ray diffraction thoughts can be utilized to provide special characterizations of colloidal crystal buildings ready utilizing various self-assembly recommendations, and the way clever platforms can be utilized to enquire illness formation and diffusion in-situ. some of the most striking phenomena exhibited via targeted suspensions of colloidal debris is the spontaneous self-organization into constructions with long-range spatial and/or orientational orders. The research additionally unearths the delicate structural adaptations that come up via altering the particle form from round to that of a rounded dice. particularly, the roundness of the dice corners, while mixed with the self-organization pathway, convective meeting or sedimentation, used to be proven to persuade the ultimate crystal symmetries.

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We start in Chap. 2 with the preparation of these dried colloidal crystals via sedimentation and vertical deposition. Our aim is to investigate the structure and possible defects via several types of X-ray diffraction experiments performed at synchrotrons and free electron lasers, which allow larger sample volumes and provides better statistics on the structure analysis. However, each X-ray diffraction setup has specific sample requirements which have to be met and the experimental challenges are described.

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