Assembling anisotropic colloidal building blocks

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Assembling anisotropic colloidal building blocks

Type: Doctoral Thesis
Title: Assembling anisotropic colloidal building blocks
Author: Meester, V.
Journal Title: Casimir PhD Series
Issue Date: 2018-06-07
Keywords: Soft Matter
Colloids
Anisotropy
Patchy
Self-Assembly
Reconfigurability
Colloidal crystals
Defects
Abstract: This PhD-thesis presents a study on micron-sized particles, so-called colloids. By controlling the chemical and physical properties of these particles, such as the interparticle interaction and the particles’ shape, colloids can act as building blocks that self-assembly into larger structures. This could lead to the development of materials with novel properties such as ‘smart’ materials with the ability to adapt their structure to the environment. In this thesis spherical colloids are used as a starting point to make complex colloidal building blocks and larger microstructures. Anisotropic particles were formed by introducing surface roughness, dents, protrusions and chemical functionalization on the particle surface. Complex structures were obtained by assembling and reconfiguring clusters of spheres. Here, a balance of several phenomena including, the interfacial and potential energy, entropy and geometric constraints, determined the final geometry of the assembled structure. The work also shows how anisotropic elongated particles distorted the hexagonal order in crystals of spheres, either locally or over long distances. These distortions are known to influence the optical, mechanical and electronic properties of colloidal crystals. The complex particles and assemblies made in this study are therefore an important step towards the development of materials with novel and adaptable properties.
Promotor: Supervisor: Hecke M.L. van Co-Supervisor: Kraft D.J.
Faculty: Science
University: Leiden
Uri: urn:isbn:9789085933434
Handle: http://hdl.handle.net/1887/62808
 

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