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Effect of crystallisation rate and colloidal stability on structural rearrangements during growth of colloidal monolayers
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
2003 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 265, 29-35 p.Article in journal (Refereed)
Abstract [en]

The structural rearrangements during growth of colloidal crystals were investigated using a combination of light microscopy and image analysis based on a Delaunay triangulation procedure. We followed the creation and disappearance of square lattice domains during the convection-promoted formation of colloidal monolayers by drying. We found that the concentration of square lattice domains increased with the crystal growth rate and that there is a direct relation between the concentration of square lattice domains formed at the crystal-suspension interface and the lower concentration of these domains in the colloidal monolayer; hence, the degree of rearrangement from square lattice domains to a close-packed triangular structure is not significantly affected by the crystal growth rate for colloidally stable suspensions. The colloidal stability, manipulated by the addition of salt, has a profound influence on the structural features of the growing monolayers. Particles that adhere strongly to each other, and to the substrate, tend to resist rearrangement; hence, the defect density is high in the colloidal monolayers and the structural reorganization of the square lattice domains to the more stable close-packed triangular structure occurred gradually over large distances from the crystal-suspension interface.

Place, publisher, year, edition, pages
2003. Vol. 265, 29-35 p.
Keyword [en]
Colloid, monolayer, crystallization, transition, growth, structure, interactions, triangulation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26684OAI: oai:DiVA.org:ri-26684DiVA: diva2:1053687
Note
A1586Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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